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About Calcorithm

Calcorithm is a free collection of 120+ online calculators, converters and generators. Our goal is simple: whenever you have a number to work out — a mortgage payment, a percentage, a unit conversion, a developer hash — you should be able to get an accurate answer in one click, without sign-ups, paywalls or clutter.

What we offer

Calcorithm covers 10categories — including finance, mortgage, health, math, unit conversion, dates & time, developer tools and SEO. Every tool runs instantly in your browser and is paired with a plain-English explanation, the underlying formula, worked examples and practical tips, so you not only get the answer but understand how it was calculated.

How we keep tools accurate

Each calculator is built on well-established, publicly documented formulas — for example, the standard amortization formula for mortgages, the Mifflin-St Jeor equation for calorie needs, and WHO thresholds for BMI. Tools that rely on changing data, such as the currency converter, fetch live rates from reputable third-party APIs. We review tools periodically and welcome corrections from users.

Our principles

  • Free and open access. No account, no registration, no credit card. Every tool is free to use.
  • Privacy first. The values you enter into a tool are processed in your browser and are never stored or sold. See our Privacy Policy for details on cookies and advertising.
  • Clarity over clutter. Fast, distraction-free tools with helpful context around every result.
  • Educational, not advisory. Our tools provide estimates for informational and educational purposes — they are not financial, medical or legal advice.

Who is behind Calcorithm

Calcorithm is an independent project built and maintained by a small team that believes everyday math tools should be fast, accurate and free for everyone. We are continuously adding new tools and improving existing ones based on what people actually search for.

Contact

Found a bug, have a suggestion, or want a new calculator added? We'd love to hear from you — email info@calcorithm.com or use our contact page.