Percentage Calculator
Calculate percentages, percentage change, discounts, and more with this versatile tool.
Related Tools
How to use the Percentage Calculator
This percentage calculator handles six common types of percentage problems. Simply select the type of calculation you need, enter the required numbers, and get instant results with a breakdown of the calculation.
X% of Y
What is X% of Y?
X is what %
X is what % of Y?
% Change
Percentage increase or decrease
Discount
Price after discount
Add %
Add percentage to a number
Subtract %
Subtract percentage from a number
What this calculator shows you
- ✓X% of Y — Find the percentage of any number.
- ✓X is what % of Y — Determine what percentage one number is of another.
- ✓Percentage change — Calculate the increase or decrease between two values.
- ✓Discount calculations — Find the final price and amount saved after a discount.
- ✓Add/Subtract percentage — Increase or decrease a number by a percentage.
- ✓Calculation breakdown — See the step-by-step formula used for each calculation.
Common Percentage Formulas
X% of Y = (X / 100) × Y
→ 20% of 500 = (20/100) × 500 = 100
X is what % of Y = (X / Y) × 100
→ 25 is what % of 200 = (25/200) × 100 = 12.5%
Percentage Change = ((New - Old) / |Old|) × 100
→ From 100 to 150 = ((150-100)/100) × 100 = 50%
Discount Amount = Price × (Discount% / 100)
→ ₹1000 × (20/100) = ₹200 off
Price After Discount = Price - Discount Amount
→ ₹1000 - ₹200 = ₹800
Add X% to Y = Y + (Y × X / 100)
→ 500 + 10% = 500 + 50 = 550
Subtract X% from Y = Y - (Y × X / 100)
→ 500 - 10% = 500 - 50 = 450