How to use: Choose one of three modes — calculate X% of a number, find the percentage change between two values, or work out what percentage one number is of another. Decimals supported.
Snumly's percentage calculator handles three of the most common percentage questions in one place. Whether you need to find a percentage of a number, calculate how much something has increased or decreased, or work out what percentage one figure is of another — this tool does it instantly with full decimal support.
Percentage calculations come up constantly in everyday life — calculating a discount on a purchase, working out a pay rise, understanding exam scores, figuring out VAT or sales tax, or comparing prices. This calculator handles all of these with accuracy.
All three modes support decimal inputs and outputs, so you can calculate 17.5% VAT, a 2.5% interest rate, or any other non-whole percentage with precision.
How do I calculate 20% of a number?
Use the 'X% of Y' mode. Enter 20 in the first box and your number in the second box. The result appears instantly. For example, 20% of 150 is 30.
How do I calculate a percentage increase?
Use the '% change' mode. Enter the original value on the left and the new value on the right. The calculator shows the percentage increase or decrease automatically.
What is 15% of 200?
15% of 200 is 30. Enter 15 in the percentage field and 200 in the number field using the 'X% of Y' mode.
How do I calculate VAT?
Use the 'X% of Y' mode. Enter your VAT rate (e.g. 15 for 15% VAT) and the pre-tax price. The result is the VAT amount. Add this to the original price for the total including VAT.
How do I work out what percentage one number is of another?
Use the 'X is what %' mode. Enter the part in the first box and the whole in the second box. For example, to find what percentage 30 is of 150, enter 30 and 150 — the answer is 20%.