Free everyday calculator
Percentage Calculator
Work out percentages, discounts, percentage change, tax, tips, bill splits, and profit margins. Enter values for instant results—no account or spreadsheet needed.
6 practical calculators Live results Works on mobile
1. Find a percentage of a number
Example: What is 15% of 240?
Result: 36
Formula: percentage ÷ 100 × number
2. What percentage is one number of another?
Result: 25%
Formula: part ÷ whole × 100
3. Percentage increase or decrease
Increase: 25%
Formula: (new − old) ÷ |old| × 100
4. Discount and sale price
5. Add tax or tip and split the bill
This treats tax and tip as percentages of the entered bill amount. Local tax and tipping conventions vary.
6. Profit margin and markup
Margin = profit ÷ selling price. Markup = profit ÷ cost. These are different measures.