About SolveCalcs

SolveCalcs is a small independent project that makes science homework easier to check and easier to understand. We build free calculators for physics, chemistry and study planning, and we write short guides that explain the idea behind each topic in everyday language.

What we care about

• Show the substitution. A bare number teaches nothing. Every solver here writes out the formula, the values and the units.
• Keep it free. No account, no paywall and no cap on how often you use a tool.
• Respect your data. Calculations run in your browser. What you type into a solver does not leave your device.
• Write like a person. If a guide needs a glossary to be understood, we have not done the job.

How we build and check

Each calculator is tested against worked examples that we solve by hand first, including awkward cases such as zero values, negative signs, unit mixes and formulas with brackets. When a user reports a wrong answer we reproduce it, fix it and add it to the tests so it cannot come back.

What we are not

We are not an exam board or a tutoring service. Our tools help you check work and see methods, but your teacher and your syllabus decide what counts as a correct answer in your course.

Paying for it

The site is supported by advertising, which keeps the tools free. You can read how that works in the privacy policy.

Questions or ideas? Get in touch.