Percentage Calculator

Calculate percentages, shares and percentage changes.

● Runs locally in your browser. No file or text uploads.

Compare two values

20% of 80 is 16. A value of 10 is 50% of 20. A change from 100 to 125 is a 25% increase.

Percent versus percentage points

Moving from 10% to 15% adds 5 percentage points. The relative increase is (15 − 10) / 10 × 100 = 50%. Choose the calculation that matches your question instead of treating these results as interchangeable.

When to use it

Distinguish a percentage change from a percentage-point difference: moving from 10% to 15% is +5 points, or a 50% relative increase.

About this tool

Calculate percentages, shares and percentage changes. Use it without creating an account. Results are available immediately, and inputs are not saved between visits.

Does this send my input to a server?

Inputs are processed locally. Optional Analytics sends page statistics only after consent; tool inputs and files are excluded.