Percentage calculator
Three common percentage questions, answered as you type.
What is X% of Y?
X is what percent of Y?
Percentage increase or decrease
Add or subtract a percentage
How to use Percentage calculator
Three steps. No account, no upload, no waiting in a queue.
- 1
Pick the question that matches yours.
- 2
Enter the two numbers.
- 3
Read the answer and the formula.
Why use Tooldesk percentage calculator
Free, with no sign-up
Instant results as you type
Works offline once loaded
Nothing you type is sent anywhere
Frequently asked questions
How do I calculate a percentage increase?
Subtract the old value from the new value, divide by the old value, then multiply by 100.
How do I find 15% of a number?
Multiply the number by 0.15. For example, 15% of 200 is 30.