What is Y% of X?
Example: what is 20% of 150?
Result30
Free online calculator
Percentage Calculator
for everyday math
Calculate percentage values, percentage increases and percentage decreases instantly in your browser.
Percentage Increase
Find the increase from an old value to a new value.
Result25%
Percentage Decrease
Find the decrease from an old value to a new value.
Result20%
Use cases
Useful for discounts, growth rates, price changes, reports, invoices and quick planning.
- Discount and sale calculations
- Growth or decrease checks
- Fast daily calculations
Related calculators and utilities
Return to the calculators section for current browser-based utilities and future category updates.
Run everyday arithmetic
Use a controlled calculator for basic operations, decimals and parentheses.
Convert common measurement units
Convert length, weight, temperature and volume values.