Percentage of a value
15% of 10,000 is 1,500. Multiply the value by the percentage, then divide by 100.
PERCENTAGE / MAKE SENSE OF NUMBERS
Percentage calculator
Calculate percentages, changes, and discounts with the formula in view.
What percentage of a value?
Negative values and percentages above 100% are allowed.
Negative baselines use their absolute value as the denominator. An increase is positive and a decrease is negative. Change from zero is undefined.
Applied to the price remaining after the first discount.
Result
Enter values to calculate
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Original value × percentage ÷ 100
Rounding is for display only. Intermediate calculations are not rounded.
Your numbers are not saved or uploaded.
Percentage change
100 → 125 is a 25% increase. Divide the difference by the absolute baseline.
Successive discounts
20% off followed by another 10% off gives 28% off, rather than the sum of 30%.
How to use the percentage calculator
Use this tool to compare proportions, before-and-after changes, and successive price discounts.
Choose a calculation type, fill in all inputs, and review the result and formula. Select decimal precision and copy the result.
Why is percentage change from zero undefined?
The formula divides by the baseline, so a zero baseline makes it undefined. Compare the absolute difference instead.
Will the result match my checkout total?
Only your entered discounts are applied. Shipping, tax, coupon conditions, and retailer rounding rules are not included.