Calculators — Math & Everyday

Free online math calculators: percentages, fractions, mean median mode, standard deviation, GCF and LCM, ratios and quadratic equations.

8 tools

Math calculators for homework, work and everyday questions: percentages and percent change, fractions, mean, median and mode, standard deviation, GCF and LCM, ratios and quadratic equations.

Each calculator shows the result clearly, and the matching guide explains the method with a worked example.

Frequently asked questions

How do I calculate a percentage?

Divide the part by the whole and multiply by 100, or use the Percentage Calculator for X% of Y and percent change.

Sample or population standard deviation?

Use population when you have the whole group and sample when your data is a subset.

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