Percentage Calculator
Calculate discounts, increases, percentages of values, and percentage changes between numbers.
The percentage calculator brings together the most common everyday percentage calculations: finding out how much X% of a value is, calculating a discounted or increased price, and measuring the percentage change between two numbers. Pick the calculation type, fill in the values, and watch the result update automatically.
How to use
- Choose the calculation you need: percentage of a value, discount, increase, or change between two values.
- Fill in the fields that appear for that calculation.
- The result updates automatically as you type, no button needed.
Frequently asked questions
How do I calculate how much X% of a value is?
Multiply the value by the percentage and divide by 100. For example, 15% of 200 is (200 × 15) ÷ 100 = 30.
How do I calculate a discounted price?
Subtract from the original value the percentage discount applied to it. A $100 item with a 20% discount costs $80, a $20 saving.
How do I calculate the percentage change between two values?
Subtract the initial value from the final value, divide by the initial value, and multiply by 100. A value going from 100 to 120 changed by +20%.