About this calculator
Turn a decimal or metric dimension into a fraction you can find on a tape, or the other way round. Fractions such as 7/16 are accepted as input.
How it’s calculated
Fraction = round(decimal × denominator) ÷ denominator, then simplified.
Worked example
With these inputs:
- Convert from
- Millimetres
- Value
- 18
the result is:
- Nearest 1/16"
- 11/16"
- Nearest 1/32"
- 23/32"
- Nearest 1/64"
- 45/64"
- Decimal inches
- 0.7087"
- Millimetres
- 18 mm
Tips from the trade
- Most tapes are marked in 1/16". Cabinetmakers often work in 1/32".
Results are estimates for planning and pricing. Check quantities against your drawings, the manufacturer’s data and the Building Regulations before ordering.