About Calcuris
Calcuris is an independent publisher of free, interactive calculators for the US, UK, Canada and Australia, with a growing Spanish-language section. We build each tool from primary official data and document our formulas in the open — see our methodology.
What Calcuris is
Calcuris publishes calculators across finance, tax, salary, health, math and everyday practical tools — mortgage and loan payments, income and sales tax, take-home pay, BMI and calories, percentages and fractions, concrete and material quantities, and more. Every tool runs country-specific logic for the US, UK, Canada and Australia rather than a one-size-fits-all formula, and we are steadily expanding our Spanish-language calculators for Spanish-speaking readers.
Our method
We build from primary official sources — the IRS and HUD in the US, HMRC in the UK, the CRA in Canada, the ATO in Australia, and equivalent national tax and statistics offices — rather than secondary summaries. Each calculator’s engine is checked against worked examples until it matches the official figures to the cent, and every page cites and dates its sources so you can verify them yourself. The full process — how we source data, build engines, check accuracy and decide when to update — is documented on our methodology page.
Who is behind Calcuris
Calcuris is researched and maintained by the Calcuris Data & Research Team, an independent group of analysts covering finance, math, health and practical tools. We are not a government agency, a bank, an accounting firm or a medical provider, and we do not claim professional financial, tax, medical or legal authority. We are researchers who source, calculate and cite — see the team on our methodology page.
Why Calcuris is free
Every calculator on Calcuris is free to use, with no account and no paywall. The site is currently supported by its own resources, and over time we expect to fund ongoing development through advertising shown alongside our tools. Advertising will never change the numbers a calculator produces — see our privacy policy for details on how ads and analytics work.
Get in touch
Found an error in a figure or a bug in a calculator? Interested in partnering or embedding a tool? Visit our contact page — we read every message and prioritize fixing data errors quickly.