Calculators World is an independent online calculator publisher serving users in Canada, Europe, and worldwide. We build and maintain practical web calculators that help people explore numbers, compare scenarios, and perform everyday calculations.
Calculators World is a software publisher. We are not a tax, accounting, legal, medical, or financial practice, and we do not present invented experts or professional credentials. Our goal is to make useful tools transparent about their inputs, formulas, sources, assumptions, and limitations.
Our websites
The network consists of separate websites with different subject areas:
- GSTCalculator.ca — Canadian GST calculations and related examples.
- HSTCalculator.ca — Canadian HST calculations, including province-specific HST use cases.
- GSTCalculator.net — general GST calculation tools and country-specific GST resources.
- CalculatorsCanada.ca — Canadian financial, tax, and other practical calculators.
- CalculatorsWorld.com — a broader collection of calculators across several subjects.
- VATCalculator.eu — European VAT calculations and country-specific VAT resources.
Each website is maintained as its own publication. Its About, Sources, calculator explanations, and update notes should describe that site’s actual tools and audience rather than repeating a generic network page.
How we build calculators
Calculator logic is developed and tested in source-controlled projects. A calculator page should explain what the user can enter, how the result is derived, and how rounding is handled. Where useful, the page also includes practical examples, reverse calculations, printable or shareable results, and links to related tools.
For rate-sensitive calculators, we use relevant official or primary sources wherever practical. A calculator may display a current rate, a historical rate, or a user-entered rate depending on the tool. The applicable source, effective period, and last verification date should be shown on the calculator page when those details matter.
Official rates and rules can change. A source may also contain exemptions, special cases, place-of-supply rules, registration requirements, or other conditions that a general calculator does not model. A result is therefore an estimate based on the stated inputs and assumptions, not a determination of a user’s legal or tax position.
Corrections and updates
We welcome reports about incorrect rates, formulas, wording, accessibility, or broken links. To help us review a report, please include:
- the calculator or page URL;
- the values and options entered;
- the result received;
- the result expected; and
- an official or primary source link, if available.
Material changes should be reviewed, tested, and recorded with the relevant effective date, verification date, source, and publication date. Site-specific update logs may be published on the relevant website.
What our calculators are not
Calculators World tools provide general information and estimates. They are not professional tax, accounting, legal, medical, or financial advice. Do not rely on a calculator alone for a decision with material consequences. Check the relevant government or professional source, or consult a qualified professional when appropriate.
Contact
To contact Calculators World or report a problem with one of the network’s websites. Please do not send passwords, payment details, government identifiers, or other sensitive personal information.
You can also use the Contact page on the relevant calculator website so that the report is associated with the correct site and tool.