Percentage Calculator
Work out percentages, increases and changes.
What is % of ?
30
is what percent of ?
25 %
Percentage change from to
+50 %
About the Percentage Calculator
Work out percentages, percentage change and reverse percentages with clear, labeled inputs. Quick answers for discounts, tips, tax, growth and everyday math.
How to use it
- 1Pick the type of calculation you need.
- 2Enter your numbers in the labeled fields.
- 3Read the result instantly.
The everyday percentage problems, solved
Percentages trip people up because there are several different questions hiding behind the same word: what is 15% of 80, what percent is 12 of 50, and what's the change from 200 to 260? Each needs a different formula, and it's easy to reach for the wrong one. Labelled fields for each type remove the ambiguity, so you pick the question you're actually asking and read the answer. That covers the common real-world cases — tips, taxes, discounts, markups, exam scores and growth rates — without second-guessing the maths.
Common uses
- Working out a tip or a sale price from a percentage.
- Finding what percentage one number is of another, like a score.
- Calculating percentage growth or decline between two figures.
Frequently asked questions
- Can it calculate percentage increase or decrease?
- Yes — enter the old and new values to get the percentage change between them.
- How do I work out a discount?
- Use the 'percentage of a number' calculation: enter the discount percent and the original price to see the amount off, then subtract it for the sale price.