Fraction to Decimal Calculator
Formula
Decimal = Numerator ÷ Denominator
To convert a fraction to a decimal, divide the numerator (top number) by the denominator (bottom number). For example, 3/8 = 3 ÷ 8 = 0.375.
How to use
- Enter the top number in the Numerator field.
- Enter the bottom number in the Denominator field.
- Read the Decimal result, plus the equivalent percentage.
Example
Enter 3 as the Numerator and 8 as the Denominator. The tool divides 3 ÷ 8 = 0.375, which is also 37.5% as a percentage.
Frequently Asked Questions
What is 3/8 as a decimal?
3/8 = 0.375
What is 1/3 as a decimal?
1/3 = 0.333... (repeating). It's a non-terminating decimal.
How do I convert a decimal back to a fraction?
Write the decimal over a power of 10 (e.g., 0.75 = 75/100), then simplify. 75/100 = 3/4.
How do I convert a mixed number like 2 3/4 to a decimal?
Convert just the fractional part to a decimal and add it to the whole number. For 2 3/4, divide 3 by 4 to get 0.75, then add the 2 to get 2.75. You can also turn the whole thing into an improper fraction first (11/4) and divide, which gives the same 2.75.
Why do some fractions give repeating decimals?
A fraction produces a repeating decimal when its denominator has prime factors other than 2 or 5 after the fraction is fully reduced. For example, 1/3 = 0.333... and 1/7 = 0.142857... repeat forever, while 3/8 ends cleanly at 0.375 because 8 is just 2×2×2. When you see a repeating result, it's usually rounded to a set number of decimal places for practical use.