01
Everyday percentages
Handle the quick percentage questions that appear in daily life, from splitting amounts to comparing two numbers.
- Percentage of a number
- What percent?
- Percentage difference
- Reverse percentage
Free percentage calculator
Percentage answers that make sense.
Enter two numbers. Get the answer, the formula and a plain-English explanation—without signing up or second-guessing the maths.
- No sign-up
- Works in your browser
- Clear working
Quick calculator
What do you need to find?
Choose a calculation, enter the numbers and we’ll show the working.
Popular:
Built around real questions
Percentage calculators for everyday decisions.
Start with the general calculator above, then move into a focused tool when the context matters.
02
Money & shopping
Check a sale price, tip, tax, markup or savings amount before money changes hands.
- Discount
- Sales tax
- Tip
- Markup
03
Business & work
Measure growth, margins, commissions and changes in the numbers that keep work moving.
- Profit margin
- Growth rate
- Commission
- ROI
04
School & grades
Turn points into percentages and understand grades, scores and attendance without reworking the formula.
- Grade percentage
- Test score
- Attendance
- Points needed
05
Health & fitness
Put weight change, training progress and nutrition ratios into clearer percentage terms.
- Weight change
- Body fat
- Macro split
- Goal progress
06
Data & change
Compare observations, quantify error and describe increases or decreases with the right baseline.
- Percent change
- Percent error
- Relative difference
- Index change
The maths behind the click
Three percentage formulas cover most questions.
You do not need to memorise them. But seeing the method makes every answer easier to trust.
Find a percentage
What is 15% of 240?
(15 ÷ 100) × 240 = 36 Convert the percentage to a decimal, then multiply it by the number.
Find the percent
36 is what percent of 240?
(36 ÷ 240) × 100 = 15% Divide the part by the whole, then multiply the result by 100.
Measure a change
From 200 to 240
((240 − 200) ÷ 200) × 100 = 20% Use the original number as the baseline for an increase or decrease.
Why Percentage.click?
Because the answer is more useful when you can see why it is right.
A bare number solves the question once. A clear formula helps you understand the relationship between the part, the whole and the percentage—so you can use the same thinking again.
Percentage.click is designed as a fast static site. Calculations happen on the page, the layout stays lightweight and every tool is organised around a specific question rather than a wall of inputs.
Run a calculationCommon questions
A few useful percentage shortcuts.
Short answers to the questions people most often ask before reaching for a calculator.
How do I calculate a percentage of a number?
Divide the percentage by 100 and multiply the decimal by the number. For example, 15% of 240 is 0.15 × 240, which equals 36.
How do I find what percentage one number is of another?
Divide the first number by the second, then multiply by 100. If 36 is the part and 240 is the whole, 36 ÷ 240 × 100 equals 15%.
How is percentage change calculated?
Subtract the original value from the new value, divide that difference by the absolute original value, and multiply by 100. A positive answer is an increase; a negative answer is a decrease.
Does Percentage.click store the numbers I enter?
No. The homepage calculator runs in your browser, so the values you enter are not sent away for calculation.
One question. Two numbers.