About CalcSolver

What We Do

We build simple, accurate calculators for the math people actually need: percentages, fractions, algebra, geometry, statistics, grades, health and money. Each tool has a short guide with the formula and worked examples, so you can learn the method as well as get the answer.

• =Accurate results

  Answers are calculated to 12 significant digits and rounded correctly, and every tool is checked against problems with known answers.

• →Working shown

  Where it helps, the steps are listed under the result, so students can check homework rather than copy an answer.

• ✓Private by design

  The math happens on your device. What you type is not sent to a server, and there is nothing to sign up for.

• □Works everywhere

  Phones, tablets, laptops and school Chromebooks all work, with full keyboard support on desktop.

Our Principles

• Free to use. Every calculator on this site is free, with no paywall and no premium tier.
• Clear over clever. Plain labels, plain-English guides and no hidden modes, games or tricks.
• Honest about limits. Finance and health tools are for learning and estimates, and we say so on the page.
• Corrected quickly. If you find an error, tell us and we will check and fix it.

A Note On The Name

Several unrelated websites use the name CalcSolver. This site, calc-solver.co, is independent and is not affiliated with any of them. Please judge each site on its own.