Percentage calculator
Quick percent math without opening a spreadsheet.
Type any two numbers and read all three percentage answers at once.
Comment utiliser cet outil
- Type the two numbers in any of the three blocks.
- Read the three percentage answers below.
- Adjust the inputs to compare scenarios.
- Copy the figure you need.
Cas d’usage typiques
- Calculating retail discounts before checkout.
- Checking tax or tip on a bill.
Limites et mises en garde
- Computations use floating-point math; round the final number where appropriate.
- Educational helper only; for legal taxes, confirm with the official source.
Frequently asked questions
How do I calculate X percent of a number?
Multiply the value by X and divide by 100. Example: 15% of 200 = 200 × 15 ÷ 100 = 30.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. Example: 25 is 50% of 50 because 25 ÷ 50 × 100 = 50.
How is percent increase or decrease calculated?
Use (final − initial) ÷ initial × 100. A positive result is an increase; negative is a decrease.
Confidentialité sur cette page
Les balises d’analyse produit (si vous les ajoutez plus tard) doivent se charger uniquement après consentement. Ce site n’impose pas de traceurs tiers.
Use this percentage calculator for shopping discounts, taxes, tips, statistics homework, or any number you want to grow or shrink by a percent. Numbers are not sent to any server.