Educational information
Percentage Calculator provides general mathematical tools and explanations. It is an independent website, not a bank, school, government agency or professional advisory service.
Check consequential results
Examples use simplified situations. Actual grading systems, transaction policies, taxes and financial products may apply additional rules. Do not rely solely on a calculator result for decisions requiring professional judgement or official certification.
Arithmetic and rounding
The tools use standard JavaScript floating-point arithmetic. Displayed values can be rounded, and some combinations are undefined or intentionally unsupported. See each calculator’s input rules and formula before applying the answer.
No outcome guarantees
We do not guarantee savings, grades, returns or any other real-world outcome from using a result. If you find an error, please report the inputs and expected result so it can be reviewed.