Fraction to Decimal Calculator
Enter a fraction or mixed number and convert it to a decimal. The chart below shows common examples used on rulers.
Fraction to Decimal Calculator
Use the main calculator to enter fractions, decimals, mixed inch values, or millimeters. The chart below gives quick reference values for this page.
Open CalculatorCommon Fraction to Decimal Examples
Quick examples for fractions often found on inch rulers.
| Fraction | Decimal | Millimeters | Example use |
|---|---|---|---|
| 1/16 | 0.0625 | 1.588 | small ruler mark |
| 1/8 | 0.1250 | 3.175 | rough layout |
| 3/16 | 0.1875 | 4.763 | cabinet adjustment |
| 1/4 | 0.2500 | 6.350 | common quarter inch |
| 5/16 | 0.3125 | 7.938 | fine layout |
| 3/8 | 0.3750 | 9.525 | ruler midpoint between 1/4 and 1/2 |
| 1/2 | 0.5000 | 12.700 | half inch |
| 3/4 | 0.7500 | 19.050 | three quarter inch |
Note: Values are based on 1 inch = 25.4 millimeters.
Basic formula
- Divide the top number by the bottom number.
- 3/8 becomes 3 divided by 8.
- The decimal result is 0.375.
Mixed numbers
- Convert the fraction part first.
- Add the whole number afterward.
- 1 3/16 equals 1.1875.
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