What's the difference between % and percentage points?

If a rate goes from 5% to 7%, that's a 2 percentage point increase but a 40% relative increase. The Δ-points mode shows both.

How do I calculate a percentage increase?

Use the '% Change' mode. Enter the old value and new value. The formula is ((new - old) / old) × 100.

What's the tip calculator mode?

Enter the bill total and desired tip percentage. It shows the tip amount, total bill, and per-person split for up to 10 people.

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Percentage Calculator

Compute percentages, increases, decreases, tips, and percentage-of-total — six modes.

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About this tool

Switch between six modes: X% of Y, X is what % of Y, % change, after-discount price, tip calculator, and percentage points. Each shows the formula used.

How to use

1 Choose one of the six calculation modes from the tabs.
2 Enter the required numbers in the input fields.
3 The result calculates instantly and shows the formula used.
4 Switch modes at any time — inputs are preserved where applicable.

Frequently Asked Questions

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