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1/2 as a Decimal
Last updated: May 31, 2026
Written by Blake Boege
Converting a fraction to a decimal is calculated by dividing its numerator by its denominator.
Find out how to convert 1/2 as a decimal. See the step-by-step division, the simplified decimal value, and a live fraction-to-decimal converter.
Quick Answer
1/2 as a decimal is 0.5.
1/2 = 0.5
e.g. 3
Cannot be 0. · e.g. 4
Adjust numerator and denominator to dynamically recalculate the value.
Decimal value
0.5
1/2 as a decimal
Divide the numerator by the denominator.
How it works
To find the decimal representation of the fraction 1/2, divide the numerator by the denominator:
Division Formula
1 ÷ 2 = 0.5
Decimal Type
This is a terminating decimal, which means the division resolves cleanly without repeating values.
Step-by-Step Division for 1/2
To perform this conversion manually, use long division. Treat the fraction line as a division symbol:
1. Divide the numerator by the denominator: 1 ÷ 2.
2. The division resolves cleanly to 0.5.
Terminating vs. Repeating Decimals
Fractions whose denominators only have prime factors of 2 or 5 will always result in a terminating decimal (like 1/2, 1/4, or 1/5). Denominators with other prime factors (like 3 or 12) result in repeating decimal sequences.
Common Fraction Equivalents Reference Table
| Fraction | Decimal | Percent |
|---|---|---|
| 1/2 | 0.5 | 50% |
| 1/3 | 0.333… | 33.3% |
| 1/4 | 0.25 | 25% |
| 3/4 | 0.75 | 75% |
| 1/5 | 0.2 | 20% |
| 2/5 | 0.4 | 40% |
| 3/5 | 0.6 | 60% |
| 4/5 | 0.8 | 80% |
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Frequently asked questions
1/2 as a decimal is 0.5.
Divide the numerator (1) by the denominator (2): 1 ÷ 2 = 0.5.
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