Terms of Use

1. Acceptance of Terms

By accessing or using any part of GreenCalculus — the website and its calculators, the GreenCalculus API, our add-ons and client libraries, our MCP server, the methodology documentation, or any associated content — you agree to be bound by these Terms of Use in full. This agreement takes effect immediately upon your first access to the platform and continues for the duration of your use.

If you are accessing the platform on behalf of an organisation, you represent that you have the authority to bind that organisation to these Terms. In that case, “you” and “user” refer to both you individually and the organisation you represent.

If you do not agree with any part of these Terms, you must not access or use the platform. Continued use of the platform after any update to these Terms constitutes your acceptance of the revised version.

2. Description of the Platform

GreenCalculus.com is a web-based environmental calculation platform. It provides calculation tools, analytical instruments, and methodology-based estimation infrastructure for professionals working in greenhouse gas accounting, energy management, and sustainability reporting.

The platform’s calculation logic is aligned with globally recognised standards including the GHG Protocol Corporate Standard, the GHG Protocol Land Sector and Removals Standard (2026), IPCC Sixth Assessment Report GWP values (AR6, 100-year basis), U.S. EPA emission factor datasets, DEFRA GHG Conversion Factors, and the IEA Global Energy Review 2026. Alignment with these standards means our methodology is derived from and consistent with their published guidance — it does not mean our outputs are certified or endorsed by these organisations.

GreenCalculus is a calculation tool, not a decision authority. The platform produces estimates that support analysis. It does not make determinations about your organisation’s compliance obligations, reporting requirements, or regulatory standing.

2a. What these Terms cover

The platform is not only the website. We deliver the same calculation infrastructure through several surfaces: greencalculus.com and its calculators, the GreenCalculus API, our Google Sheets add-on, the client libraries we publish for JavaScript and Python, our MCP server for AI agents, and the template spreadsheets we distribute. These Terms apply to all of them, in full, whichever one you arrived through.

Some of those surfaces run inside someone else’s product — a spreadsheet in Google Sheets, an agent framework calling our MCP server, a notebook on a dataset platform. That provider’s terms apply to you alongside ours. We do not control them, we cannot vary them, and where a provider changes or withdraws a distribution channel we may have to follow.

Distribution is not endorsement. Our add-on is published by GreenCalculus and is not a Google product. Being listed in a marketplace, a registry, or a package index means an operator accepted our listing. It does not mean they have checked our emission factors, reviewed our methodology, or endorsed our results. No distributor of our software vouches for our numbers. We do.

Client software carries no extra rights. An add-on, a library, or an MCP tool call reaches the same API, on the same plan, under the same limits and the same attribution condition as a request you write yourself. Installing something of ours does not widen the licence — §8 governs either way.

3. User Responsibilities

The quality and reliability of any GreenCalculus output depends directly on what you put into it. Users are responsible for the following at all times.

• Accurate and complete input data: You must enter activity data — fuel volumes, energy consumption, fleet distances, headcount, supply chain figures — that accurately reflects your organisation’s actual operations. GreenCalculus has no mechanism to verify the data you provide. Inaccurate inputs will produce inaccurate outputs, regardless of the technical quality of the calculation engine.
• Evaluating outputs before use: You must review and critically assess any output generated by the platform before applying it in analysis, reporting, or decision-making. You should satisfy yourself that the result is plausible, consistent with other known data, and appropriate for the context in which you intend to use it.
• Ensuring suitability for your use case: Different contexts — internal management reporting, voluntary public disclosure, regulated reporting, carbon credit applications — carry different requirements for data quality, boundary definitions, and methodology. You are responsible for confirming that the tool, emission factors, and assumptions applied are appropriate for your specific purpose before relying on any output.
• Understanding methodology limitations: Each GreenCalculus tool documents its emission factor source, GWP basis, and applicable boundaries on its methodology tab. You are responsible for reading and understanding these limitations before using the tool’s outputs in any formal or consequential context.

4. Acceptable Use

You may use GreenCalculus.com for any lawful purpose consistent with the platform’s intended function: environmental analysis, internal estimation, scenario planning, methodology research, and education. The following uses are expressly prohibited.

• Misuse of calculators: You must not manipulate, exploit, or misuse the platform’s tools — including deliberately entering false data to generate misleading outputs for use in public reporting, regulatory submissions, or third-party communications.
• Reverse engineering: You must not attempt to decompile, disassemble, extract, or reverse engineer any part of the platform’s calculation logic, source code, algorithms, or proprietary methodology.
• Automated scraping: You must not use automated bots, crawlers, scripts, or any programmatic means to extract, copy, or mirror content, data, or outputs from the platform at scale without prior written authorisation from GreenCalculus.
• Systematic data extraction: You must not use the platform’s calculators as a pipeline to systematically harvest emission factor data, GWP values, or other reference data for use in competing products or services.
• Unlawful use: You must not use the platform for any purpose that is unlawful, fraudulent, or harmful — including the production of outputs intended to deceive investors, regulators, or the public about an organisation’s environmental performance.
• Interference: You must not take any action that damages, disrupts, or unreasonably burdens the platform’s infrastructure, security systems, or other users’ access.

GreenCalculus reserves the right to suspend or permanently terminate access for any user found to be in violation of this section, without prior notice and without liability.

5. Use of Outputs

All outputs generated by GreenCalculus calculators are estimates. They are produced by applying published emission factors and documented methodological assumptions to user-supplied activity data. The following conditions apply to all outputs without exception.

Specifically, users must understand and accept the following before using any output outside of internal analysis:

• Input dependency: The output is entirely dependent on the data you provided. GreenCalculus cannot assess the accuracy, completeness, or auditability of your activity data. Garbage in, garbage out applies with full force.
• Boundary sensitivity: GHG accounting results are highly sensitive to how organisational and operational boundaries are defined. The default boundaries applied by each tool are documented, but they may not match the boundaries required by your specific reporting framework or regulatory obligation.
• Emission factor currency: Emission factors are updated on a scheduled basis. The factor applied at the time of your calculation may differ from the factor that will be in effect at your reporting date. Where reporting-period accuracy is required, verify the applicable factor against the current official dataset.
• No audit guarantee: The use of this platform, regardless of how carefully outputs are produced, does not guarantee that results will be accepted by any external auditor, verification body, or regulatory authority.
• Independent validation: You are required to independently validate any GreenCalculus output before using it in a context that carries financial, regulatory, legal, or reputational consequences for your organisation.

6. Payments and Access

Some features, tools, or content on GreenCalculus.com may be available only behind an access gate — which may take the form of email registration, a subscription, or a one-time payment. The following conditions apply to all paid and gated access.

• Free and gated features: Core calculators are available to all users without registration. Additional features — including advanced reporting tools, downloadable methodology documents, priority data updates, or bulk calculation capabilities — may require account registration or payment.
• Limits are published, not improvised: Every API plan states its quota on the plan page, and that published figure is the limit we hold you to. When you reach it, calls return 429 quota_exceeded and you are billed nothing — overage stays off unless you switch it on yourself. We may also apply short-term rate limiting to keep the service healthy for everyone. What we will not do is invent a limit after the fact to justify cutting you off: if a published limit changes, §11 governs that change like any other.
• Pricing: All pricing is displayed in the relevant currency at the point of purchase. GreenCalculus reserves the right to modify its pricing, subscription tiers, or feature access at any time, except where a rate has been expressly held for the life of a subscription — see §6a and §6b. Material changes to pricing for existing subscribers will be communicated with at least 30 days’ notice.
• The product page forms part of these Terms. For the directory listing and category sponsorship described in §6a and §6b, the product page as it stood when you bought forms part of the agreement between us. Where it and these Terms differ, the product page governs. We do this so that what you were shown is what you are owed, rather than what a longer document says instead.
• Subscriptions: Where subscription access is offered, it will renew automatically at the applicable rate unless cancelled before the renewal date. You may cancel at any time from the self-service link on your Stripe receipt where one is provided, or by telling us through greencalculus.com/contact/. Except as stated in §6a and §6b, no refunds are issued for partial subscription periods unless required by applicable law.
• Revocation of access: GreenCalculus may restrict, suspend, or permanently revoke your access to paid or free features at any time where you have violated these Terms, attempted to circumvent access controls, or engaged in conduct that poses a risk to the platform or other users. Refunds in such cases are at GreenCalculus’s sole discretion.
• Taxes: Prices displayed are exclusive of applicable taxes unless otherwise stated. You are responsible for any taxes applicable to your purchase under the laws of your jurisdiction. GreenCalculus is the merchant of record and is not GST-registered; no GST is added.

6a. Directory listings

A sponsored listing places your business in the paid section of our provider directory, above the listings we selected ourselves. Price, inclusions and the number of founder places are stated on the directory page.

• What paying does and does not do. Paying places a listing in the sponsored section. It does not change whether a business qualifies, and it never changes which businesses we selected for the curated section. Paid and curated listings are shown in separately labelled sections and are never mixed.
• Review. Every listing is reviewed before it is published. We may decline a listing, or remove one already published, where it is inaccurate, misleading, or something we would not stand behind. If we decline before publication you receive a full refund.
• Refunds. A full refund is available at any time before your listing is published. After publication we do not pro-rate a part-period refund, because the placement has been held for you. We will not argue about a genuine mistake.
• Cancellation. Cancel at any time. The listing runs to the end of the period you have paid for and then comes down on its own. There is no notice period.
• What we count. We report the enquiries sent to you through your listing, and that each passed an automated check that the sender was a person. We do not read them and we do not keep them, so we cannot tell you what was asked or whether it was answered — only that it was sent.
• The contact details you give us. A listing may publish a named individual, their role and a telephone number. We do not publish the email address you give us — enquiries reach you through a form on your listing, and we pass the message on without keeping a copy. You confirm that you are entitled to publish the details that are published, that the individual is aware, and that you will tell us when they change or when the person named leaves. Please give a business line rather than a personal mobile number. The individual named may ask us to remove their details directly, without going through you, and we will act on that request.
• Your logo and description. You grant us a non-exclusive licence to display the logo, description and other material you supply, for the term of your listing and for the purpose of displaying it. You retain ownership. You confirm you have the right to grant that licence.
• Outbound links. Every outbound link in the directory carries rel="sponsored". We do not sell followed links at any price.
• Founder rate. Where a founder rate is offered and you take one, that rate is held for as long as your subscription runs continuously. If the subscription lapses, a new one is priced at the rate then current. The held rate applies to the product as it was scoped when you bought it; separate products introduced later are priced separately.

6b. Category sponsorship

Category sponsorship places your card in the result panel of the calculators in one category. Price is set by how many calculators the category holds, and both are stated on the sponsorship page.

• Sold as a whole category and nothing smaller. Sponsorship is sold as one whole top-level category. We do not sell sub-category or single-calculator placements. While a category is held, neither it nor anything within it is separately available.
• Exclusive. One sponsor per category for the term. Nothing else on a calculator page in that category is a paid placement.
• Scope is the category, not a fixed list of pages. Calculators added to the category during your term are included at no extra cost. If the number of calculators in the category falls below the band you bought at, and remains below it for 30 days, you may choose: a move to the lower band with a refund of the difference for the remainder of the term, an extension of equivalent value, or an exit with a pro-rata refund.
• Independence. Sponsors have no influence over our emission factors, methodology, or calculator results. We will not accept a sponsorship that is conditional on any of them, and we will end one that is made conditional on them later. This is not a courtesy; it is the only reason the placement is worth anything.
• Review. We review every card before it appears, and may decline or remove one. If we decline before your card is published you receive a full refund.
• Refunds and cancellation. Cancel at any time. The sponsorship runs to the end of the period you have paid for, then stops, and the category returns to sale. We do not pro-rate a part-year refund except as stated above. We will not argue about a genuine mistake.
• Outbound links. Sponsor links carry rel="sponsored".
• Founder rate. As in §6a: held for as long as the subscription runs continuously, applied to the product as scoped when bought.
• Renewal. Before offering your category to anyone else at the end of a term, we will give you 30 days in which to renew it. Exclusivity otherwise ends with the term.

7. Accounts

Where account registration is required or offered, the following terms apply.

• Registration accuracy: You must provide accurate, current, and complete information when creating an account. You are responsible for maintaining the accuracy of your account information and updating it when it changes.
• Account security: Accounts are passwordless. Access is proved by a single-use link and code sent to your email address, which means the security of that mailbox is the security of your account — protect it accordingly. API keys are separate credentials and must be treated as secrets: keep them out of public repositories, client-side code, and shared spreadsheets, and rotate a key the moment you suspect it has been seen. You are responsible for all activity under your account and under every key issued to it. You must not share account access with third parties or allow multiple individuals to use a single account without an appropriate organisational licence.
• Unauthorised access: You must notify GreenCalculus immediately at greencalculus.com/contact/ if you become aware of any unauthorised access to or use of your account. GreenCalculus is not liable for any loss arising from unauthorised use of your account where you have failed to protect your credentials.
• Account suspension: GreenCalculus may suspend or terminate your account at any time for breach of these Terms, suspicious activity, or extended inactivity. Where suspension is due to suspected security risk rather than breach, we will endeavour to notify you and resolve the issue promptly.
• Account data: Your account data is handled in accordance with our Privacy Policy.

8. Intellectual Property

The GreenCalculus platform — including its calculation logic, algorithms, methodology documentation, tool designs, user interface, written content, and underlying code — is owned by or licensed to Numbers Publishing Pte. Ltd. (UEN 202500357K), the Singapore company that owns and publishes GreenCalculus, and is protected by applicable intellectual property law.

Your use of the platform does not transfer any ownership interest in any part of it. The following uses are expressly prohibited without prior written consent from GreenCalculus:

• Copying, reproducing, or republishing any part of the platform’s content, tools, or methodology documentation
• Reselling, sublicensing, or otherwise commercialising access to the platform or its outputs
• Distributing or publicly displaying platform content in a manner that misrepresents its origin or implies endorsement by GreenCalculus
• Incorporating the platform’s calculation logic or methodology into competing products or services
• Removing or obscuring any proprietary notices, attribution statements, or source citations displayed within the platform

You retain ownership of any data you input into the platform. By submitting data, you grant GreenCalculus a limited, non-exclusive licence to process that data solely for the purpose of returning your requested calculation result. We do not store, analyse, or use your input data for any other purpose. See our Privacy Policy for full details.

Where GreenCalculus references external standards — including the GHG Protocol, IPCC reports, EPA datasets, DEFRA conversion factors, and IEA publications — those materials remain the intellectual property of their respective owners. Our use of these standards for calculation purposes does not imply affiliation with or endorsement by those organisations.

8.1 API attribution

The Free, Developer and Business API plans require attribution. Where you display a figure or a calculation obtained from the GreenCalculus API, you must display the credit returned with it, as a working link. Every API response on these plans carries that credit in its attribution field, including ready-to-use HTML, and reports attribution.required: true. This is a condition of those licences.

Enterprise plans may remove it, and are the only plans that may. On an Enterprise plan the attribution field is null and no GreenCalculus credit is required anywhere — including the per-row source credit that travels inside a dataset redistributed under a Business plan.

The credit links to a public verification page for the exact emission factor and data version used in your result. That page is openly accessible, requires no account, and contains no information about you or your request — it states what we published, when, and from which source document.

We cannot technically detect what your application displays, and we make no claim to be able to. Attribution is a licence condition rather than a technical control, and failure to comply is grounds for GreenCalculus to suspend or revoke API access.

Effective 25 August 2026, this applies to all API keys, including keys issued before that date.

8.2 What we publish under an open licence

The prohibitions in §8 exist to protect the platform. They do not reach anything we have deliberately released under an open licence — and we release a great deal.

Our client libraries are open source under the MIT licence: the JavaScript SDK, the Python SDK, the MCP server, and the source of the Google Sheets add-on. The datasets we publish on Kaggle and Zenodo carry an open licence stated on each record, currently CC BY 4.0. Where we have granted a licence of that kind, that licence governs, and nothing in these Terms narrows it. Rely on it. Fork the code, ship it inside your own product, teach from the data. The licence text is the whole of the permission — you do not need to ask us as well.

What an open licence does not include is the live service behind it. The client is free; the calls it makes are governed by your plan, and the values it returns are governed by §8.1 and §8.3. A permissive licence on our software has never been a licence to our API.

8.3 The rights of the original publishers

Emission factors are not ours. They are published by government departments, agencies, standards bodies, and research institutions. What we own is the compilation, the methodology, the software, and the audit trail around a value — never the underlying source itself.

Publishers set their own conditions, and those conditions travel with the number. One dataset may forbid commercial use. Another may forbid third-party products that calculate footprints from it. Another may require the figure to be reproduced unaltered, or credited in a particular form. We honour those conditions in what we serve, and where we cannot serve a dataset lawfully, we decline to serve it at all.

So that you can do the same, every factor we return names its source document, publisher, cell reference, and data version — on the factor page and in the citation carried with the value. Before you redistribute factor values in bulk, resell them, or build a product on them, read that publisher’s licence. Your licence from us cannot grant rights we were never given. Where the two differ, the publisher’s terms are the ones that decide.

9. Limitation of Liability

Where liability cannot be excluded under applicable law, our total aggregate liability to you for any claim arising from your use of the platform is limited to the total fees paid by you to GreenCalculus in the twelve months preceding the event giving rise to the claim — or, if no fees have been paid, SGD 100.

Nothing in these Terms excludes liability for fraud, death or personal injury caused by negligence, or any other liability that cannot lawfully be excluded or limited.

These Terms do not affect any statutory rights you hold as a consumer under the law of your jurisdiction that cannot be waived by contract.

10. Platform Changes

GreenCalculus is an actively maintained platform. The following changes may occur at any time and do not constitute a breach of these Terms.

• Tool updates: Individual calculators may be updated to reflect new emission factor releases, revised GWP values, or corrections to methodology. Where an update materially changes how a tool calculates results, the tool’s methodology tab will reflect the new version and update date.
• Methodology revisions: Where underlying standards are revised — for example, a new IPCC assessment report or an updated DEFRA dataset — GreenCalculus may update calculation logic accordingly. Outputs produced under a prior methodology version may differ from those produced after an update.
• Feature additions and removals: GreenCalculus may add, modify, or discontinue features or tools at any time. Where a paid feature is discontinued, affected subscribers will be notified in advance and an appropriate remedy — such as a pro-rata refund or access extension — will be offered.
• Service availability: GreenCalculus does not guarantee uninterrupted platform availability. Scheduled maintenance and unavoidable downtime may occur. We will endeavour to communicate planned outages in advance where operationally feasible.

11. Changes to These Terms

GreenCalculus may update these Terms of Use to reflect changes in the platform, applicable law, or our operating practices. This page is the authoritative record of the Terms in force.

• Where a revision appears: Every revision is published at greencalculus.com/terms/ with a version number and a revision date. The version shown here is the version that applies.
• When it takes effect: A revision takes effect when it is published, unless it states a later effective date.
• Material changes: Where a revision would materially reduce your rights or increase your obligations, we will take reasonable steps to bring it to your attention before it takes effect — a notice on the site, an email to the address on your account, or both, as the change warrants. Pricing changes for existing subscribers are governed separately by §6 and are unaffected by this section.
• What is not a material change: Corrections, clarifications, and the addition of new features, surfaces, or distribution channels are not material changes, provided they do not reduce rights you already hold under these Terms.

Continuing to use GreenCalculus after a revision takes effect constitutes your acceptance of it. If you do not accept a revision, stop using the platform and, where applicable, cancel your account or subscription before the effective date.

Earlier versions of these Terms are available on request from greencalculus.com/contact/.

12. Governing Law

These Terms of Use are governed by and construed in accordance with the laws of the Republic of Singapore, without regard to conflict of law principles.

Any dispute arising from or relating to these Terms or your use of GreenCalculus.com — including any question regarding their existence, validity, or termination — shall be subject to the exclusive jurisdiction of the courts of Singapore, except where applicable mandatory consumer protection law in your jurisdiction provides otherwise.

Where you are accessing the platform from a jurisdiction with mandatory local law protections that cannot be waived by contract — including but not limited to EU consumer protection law, UK consumer rights legislation, or Australian Consumer Law — those protections apply to you in addition to these Terms, and are not diminished by the Singapore governing law election.

GreenCalculus operates globally and is designed to be used by professionals in multiple jurisdictions. The choice of Singapore as governing law reflects our operational base and does not imply that the platform is unavailable, restricted, or unsuitable for users in other jurisdictions.