Fraction to Decimal Chart and Inch Calculator
Accurate fraction, decimal, and millimeter conversions for woodworking, engineering, and shop projects.
Decimal to Fraction Calculator
Conversion mode
Precision (round to nearest)
Input unit (if applicable)
Selected: 3/8 inch = 0.3750 in = 9.525 mm
Fraction to Decimal Chart
Common fractions
| Fraction | Decimal | Millimeters | Nearest 1/16 | Nearest 1/32 | Nearest 1/64 |
|---|---|---|---|---|---|
| 1/8 | 0.1250 | 3.175 | 1/8 | 1/8 | 1/8 |
| 3/16 | 0.1875 | 4.763 | 3/16 | 3/16 | 3/16 |
| 1/4 | 0.2500 | 6.350 | 1/4 | 1/4 | 1/4 |
| 5/16 | 0.3125 | 7.938 | 5/16 | 5/16 | 5/16 |
| 3/8 | 0.3750 | 9.525 | 3/8 | 3/8 | 3/8 |
| 7/16 | 0.4375 | 11.113 | 7/16 | 7/16 | 7/16 |
| 1/2 | 0.5000 | 12.700 | 1/2 | 1/2 | 1/2 |
| 5/8 | 0.6250 | 15.875 | 5/8 | 5/8 | 5/8 |
| 3/4 | 0.7500 | 19.050 | 3/4 | 3/4 | 3/4 |
| 7/8 | 0.8750 | 22.225 | 7/8 | 7/8 | 7/8 |
Note: Values are based on 1 inch = 25.4 millimeters.
How to convert fractions to decimals
- Divide the numerator by the denominator.
- Example: 3/8 = 3 divided by 8 = 0.375.
- For mixed numbers, add the whole number.
- Example: 1 3/16 = 1 + (3 divided by 16) = 1.1875.
How to convert decimals to inch fractions
- Multiply the decimal by the chosen denominator.
- Round to the nearest whole number.
- Simplify the fraction if possible.
- Example: 0.375 x 16 = 6, so 6/16 = 3/8.
When to use 1/16 vs 1/32 vs 1/64 precision
- 1/16: general carpentry and cabinet work.
- 1/32: fine woodworking and fitting joinery.
- 1/64: precision layout and model work.
- Higher precision reduces rounding error.
Decimal Inch to Fraction Chart
Convert common decimal inch values to nearest fractions at multiple precisions.
View Chart ->Millimeters to Inch Fractions
Convert millimeter measurements to inch fractions for quick shop checks.
Open Converter ->Printable Conversion Charts
Use printable fraction charts for shop walls, classroom desks, and field notes.
View Printables ->All Conversion Charts
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