Decimal to Fraction Calculator
Turn a decimal into a fraction, exactly or to the nearest sixteenth, sixty-fourth and more.
Quick answer: Type a decimal to get the exact fraction in lowest terms. For example 0.375 = 3/8, 0.25 = 1/4 and 0.125 = 1/8. You can also find the nearest fraction with a small bottom number, such as sixteenths for tape measures.
How to use it
- Type the decimal, such as 0.375 or 2.75.
- The exact fraction in lowest terms appears. 2.75 is 11/4, or 2 3/4 as a mixed number.
- For measuring, choose the largest bottom number your ruler uses (16 for most tape measures) to see the nearest fraction.
How it works
A decimal is a fraction with a bottom number of 10, 100, 1000 and so on. 0.375 is 375/1000. Dividing top and bottom by their greatest common divisor, 125, gives 3/8. The nearest-fraction option uses continued fractions to find the closest value for the bottom number you choose.
Decimal inches to fractions
| Fraction | Decimal inches | Millimeters |
|---|---|---|
| 1/16 | 0.0625 | 1.59 mm |
| 1/8 | 0.125 | 3.17 mm |
| 3/16 | 0.1875 | 4.76 mm |
| 1/4 | 0.25 | 6.35 mm |
| 5/16 | 0.3125 | 7.94 mm |
| 3/8 | 0.375 | 9.52 mm |
| 7/16 | 0.4375 | 11.11 mm |
| 1/2 | 0.5 | 12.70 mm |
| 9/16 | 0.5625 | 14.29 mm |
| 5/8 | 0.625 | 15.88 mm |
| 11/16 | 0.6875 | 17.46 mm |
| 3/4 | 0.75 | 19.05 mm |
| 13/16 | 0.8125 | 20.64 mm |
| 7/8 | 0.875 | 22.22 mm |
| 15/16 | 0.9375 | 23.81 mm |
Repeating decimals such as 0.3333 are not exactly 1/3, so use the nearest-fraction option and choose a small bottom number to get 1/3.
What people use it for
- Measuring with a tape measure
- Math homework
- Cooking and recipes
- Drilling and woodworking
Questions
How do I convert a decimal to a fraction?
Write the digits over 10, 100 or 1000 depending on the decimal places, then simplify. 0.6 = 6/10 = 3/5.
What is 0.5 as a fraction?
1/2.
What is 0.75 as a fraction?
3/4.
What is 0.125 as a fraction?
1/8.
How do I turn a decimal inch into a fraction on a tape measure?
Choose 16 as the nearest bottom number. 0.4375 is exactly 7/16.
Is it free?
Yes. No sign-up, no install and no limit.
Is anything saved or sent?
No. Everything runs in your browser. Only your own best score, where a page shows one, is kept on your device.
Last updated 2026-10-24. Free to use, no sign-up. Made by ficklestudio26.