Tape measures in the U.S. show inches and fractions; metric drawings show millimetres. This bridges the two at the precision of a typical tape (1/16″).
How to use the Metric to Inches Calculator
- Metric length
- Every result field is editable: type into Inches and Metric length plus every other field update to match.
Results update as you type, and every field accepts the units shown in its menu.
How it works
The metric length is converted to inches and also rounded to the nearest sixteenth.
What each result means
- Inches = [Metric length] ÷ 0.0254
- Nearest 1/16″ = round([Metric length] ÷ 0.0254 × 16) ÷ 16
- Feet and inches = [Metric length] ÷ 0.0254
Example values
How the main result changes when Metric length changes and everything else stays at the example values above:
| Metric length (mm) | Inches (in) |
|---|---|
| 75 | 2.9528 |
| 112.5 | 4.4291 |
| 150 | 5.9055 |
| 187.5 | 7.3819 |
| 225 | 8.8583 |
| 300 | 11.811 |
Formula
inches = mm ÷ 25.4 = cm ÷ 2.54 = m × 39.37Worked example
Inputs — Metric length: 150 mm.
Results — Inches = 5.9055 in; Nearest 1/16″ = 5 7/8; Feet and inches = 0 ft 5 7/8 in.
Frequently asked questions
How many inches is 150 mm?
About 5.906 in, or 5 15/16″.
How many inches is 1 m?
About 39.37 in.
What formula does the Metric to Inches Calculator use?
inches = mm ÷ 25.4 = cm ÷ 2.54 = m × 39.37.