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Percentage Increase Calculator — Calculate % Change Between Two Numbers

Find the exact percentage increase or decrease from one number to another, with the step-by-step formula shown live.

In plain words: Want to know the percentage increase from an old price, salary, rent or traffic number to a new one? Type the starting number and the new number into Card 1 below to see the exact percentage growth (or drop) and the working-out formula.

🔒 Runs in your browser. Nothing you type is sent anywhere ✓ No email · No sign-up · No watermark · Free
1. Percentage Increase / Decrease (From A to B)
From to
((108 − 80) ÷ 80) × 100
2. Sale Discount or Markup Calculator
%
Saved / Difference: 18
3. What is X% of Y?
What is % of
(20 ÷ 100) × 250
4. X is what % of Y?
is what % of
(45 ÷ 180) × 100
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How to Use Percentage Increase Calculator — Calculate % Change Between Two Numbers

  1. In Card 1 (Percentage Increase / Decrease), enter your starting number in the From box.
  2. Enter the new number in the To box.
  3. See the exact percentage change (+% for an increase, −% for a decrease) along with the step-by-step formula.
  4. Click the result button to copy the percentage to your clipboard.
To calculate the percentage increase between two numbers, subtract the original number from the new number, divide that difference by the original number, and multiply by 100: ((New − Old) ÷ Old) × 100. For example, if rent rises from £800 to £900, the increase is (£900 − £800) ÷ £800 × 100 = +12.5%. WeShoal shows both the final percentage and the live working-out formula so you can double-check spreadsheets, pay rises, price changes and year-on-year revenue reports.