Calculate percentages and percentage change.
Calculate percentages and percentage change. Results are estimates and depend on the assumptions you enter. Verify important financial decisions with the applicable contract, lender, tax rules or provider.
Loan · Mortgage · Compound interest · Salary
This percentage calculator handles the most common percentage problems: finding a percentage of a number, calculating percentage increase or decrease, and determining what percentage one number is of another. It is useful for discounts, tips, tax calculations, exam scores, growth rates, and everyday arithmetic.
Choose the type of calculation you need:
• “What is X% of Y?” — e.g. 15% of 200
• “X is what percent of Y?” — e.g. 40 is what percent of 200
• “Percentage change” — from an old value to a new value
Enter the numbers and the result appears immediately.
Enter the original price and the discount percentage. The calculator shows both the discount amount and the final price.
If a rate rises from 5% to 7%, it has risen by 2 percentage points, which is a 40% relative increase.
Yes. Use the “X is what percent of Y” mode or rearrange the formula: original = final / (1 ± percentage/100).
Results are shown with reasonable precision. For financial work you may want to round to two decimal places.
Quick mental-math tips:
• 10% = move the decimal one place left
• 5% = half of 10%
• 15% = 10% + 5%
• 1% = move the decimal two places left
This tool provides estimates for informational purposes only. Always verify important figures with your bank, lender, or a qualified professional before making financial decisions.