Decimal to fraction calculator
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- Write the decimal over a power of ten: 0.375 has 3 decimal places, so it is 375/1000.
- Divide the top and bottom by their greatest common factor 125: 3/8.
- This is exact for a terminating decimal; a repeating decimal such as 0.333… needs its repeating part.
| Inputs | Answer |
|---|---|
| Decimal: 0.375 | 0.375 as a fraction is 3/8. |
| Decimal: 0.125 | 0.125 as a fraction is 1/8. |
| Decimal: 2.5 | 2.5 as a fraction is 5/2. |
| Decimal: 0.0625 | 0.0625 as a fraction is 1/16. |
How to use it
Write the decimal over a power of ten, one zero for each decimal place, then simplify. 0.375 has three decimal places, so it is 375/1000, which simplifies to 3/8.
This works exactly for terminating decimals. A repeating decimal such as 0.333… is a different case: it equals 1/3 because the repeating part is known.
Frequently asked questions
What is 0.375 as a fraction?
375/1000, which simplifies to 3/8.
What is 0.5 as a fraction?
5/10 = 1/2.
How do I turn 2.5 into a fraction?
2.5 = 25/10 = 5/2, or the mixed number 2 1/2.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
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General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.