What percentage of the whole is the part?
Result
Enter a part value and a whole value to see the share.
Take a percentage of a value
Result
Enter a percentage and a base value to see the result.
How much did it go up or down?
Result
Enter a starting value and an ending value to see the change.
How it is calculated
- A whole value of 0 has no share, so the calculator stops and explains instead of guessing.
- Percentage change divides by the absolute value of the starting number. That is why −50 changing to −25 reads as "+50%": the loss has halved.
- Displayed numbers are rounded to four decimal places; the unrounded value is what carries into any further arithmetic.
- A trailing 0.5 always rounds away from zero, so 2.675 becomes 2.68.
- Numbers containing thousands separators, such as 1,234, are accepted as typed.
- Anything that is not a plain number — letters, symbols, or scientific notation such as 1e5 — is rejected with a message rather than silently treated as 0.
Examples
1. Progress towards a savings goal
Saving 37,500 towards a goal of 250,000 gives 37,500 ÷ 250,000 × 100 = 15%. The remaining 212,500 is 85%.
2. Adding a tip or a fee
15% of 32,000 is 32,000 × 0.15 = 4,800. Added on that is 36,800; taken off it is 27,200.
3. A subscription price rise
A monthly fee going from 8,000 to 9,900 is (9,900 − 8,000) ÷ 8,000 × 100 = 23.75% higher.
4. Shares above 100%
Hitting 250 against a target of 200 is 125%. Shares are not capped at 100%.
A common mix-up
Percent (%) and percentage points (pp) are different. An interest rate moving from 3% to 4% has risen by 1 percentage point, which is a 33.33% increase. The "Percentage change" tab calculates the second one.
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Three common percentage questions, split across tabs. Results update as you type.