About NumoCrunch

NumoCrunch is a set of 9 free calculators for percentages, tips, test scores and other everyday math. Every calculator runs entirely in your browser, so answers appear as you type and nothing you enter is sent anywhere.

Most calculators stop at the answer. NumoCrunch also shows the formula, a visual result bar and the arithmetic worked out with the exact numbers you entered — useful if you are checking homework, teaching a method, or want to be sure a result is right before acting on it.

Grading scales, tipping customs and tax rules vary by school, country and situation. Where a page mentions them, they are described as common practice rather than universal rules.

Start with the full calculator directory or the Tip Calculator.

This site is an independent project and is not affiliated with any school, employer or financial institution. Results are for general information, not professional advice.