1/2 as a Decimal
1/2 = 0.5
1/2 as a decimal is 0.5.
Step by step
- Divide 1 by 2: 0 whole (so the answer starts 0.), remainder 1.
- Bring down a 0: 10 ÷ 2 = 5, remainder 0.
- Result: 1/2 = 0.5.
Shortcut: 2 divides evenly into 10, so multiply the top and bottom by 5: 1/2 = 5/10 = 0.5. This works for any fraction whose denominator has only 2s and 5s as prime factors, which is why 1/2 gives a terminating decimal.
Details
- Decimal (rounded)
- 0.5
- Percent
- 50%
- Type
- Terminating decimal
- Equivalent fractions
- 2/4, 3/6, 4/8
- 1/2 inch in mm
- 12.7 mm
How it works
A fraction means division: the numerator (top) divided by the denominator (bottom). Use long division, adding zeros after the decimal point until the remainder is zero or a remainder repeats. If the simplified denominator has only 2 and 5 as prime factors, the decimal terminates; otherwise it repeats forever, and the repeating digits are marked with a bar.
Nearby values
Related conversions
Frequently asked questions
What is 1/2 as a decimal?
1/2 = 0.5.
How do you convert 1/2 to a decimal?
Divide 1 by 2. 1 ÷ 2 = 0.5.
What is 1/2 as a percent?
50%.
Is 1/2 a terminating or repeating decimal?
Terminating — the division ends with no remainder.