Decimals and percentages describe the same proportion: 0.25 of something is 25 per hundred, or 25%. Spreadsheets, statistics software and probability questions usually use decimals, while reports and shops use percentages, so converting between them is an everyday task.
How to use the Decimal to Percent Converter
- Decimal
- Every result field is editable: type into Percentage and Decimal plus every other field update to match.
Results update as you type, and everything is calculated in your browser.
How it works
Moving between the two forms means shifting the decimal point two places: to the right for a percentage, to the left for a decimal. The calculator also shows the decimal as a fraction where it has a reasonable denominator.
What each result means
- Percentage = [Decimal]×100
- Per mille (‰) = [Decimal]×1000
Example values
How the main result changes when Decimal changes and everything else stays at the example values above:
| Decimal | Percentage (%) |
|---|---|
| 0.1875 | 18.75 |
| 0.2813 | 28.125 |
| 0.375 | 37.5 |
| 0.4688 | 46.875 |
| 0.5625 | 56.25 |
| 0.75 | 75 |
Formula
Percent = decimal × 100
Decimal = percent ÷ 100
Worked example
Inputs — Decimal: 0.375.
Results — Percentage = 37.5 %; As a fraction = 3/8; Per mille (‰) = 375 ‰.
Key terms
- Percentage
- A number expressed per hundred.
- Per mille (‰)
- A number expressed per thousand.
Frequently asked questions
How do I convert 0.05 to a percentage?
Multiply by 100: 0.05 × 100 = 5%.
How do I convert 150% to a decimal?
Divide by 100: 150 ÷ 100 = 1.5. Type 150 into the percentage field.
What is per mille?
Parts per thousand – 0.375 is 375‰. It is used for alcohol limits, salinity and some interest rates.
Is 0.5% the same as 0.5?
No. 0.5% = 0.005, while 0.5 = 50%.