Metric to Fractional Inches Calculator
This conversion utility provides direct mapping between standard metric units (millimeters, centimeters, meters) and standard imperial lengths (feet, inches, fractions). The exact conversion basis is 1 inch = 25.4 mm (exact).
How Fractional Rounding Works
Because metric and imperial systems don't always align perfectly, this tool rounds to your chosen precision. For example, rounding to the nearest 1/16" divides the inch into 16 equal segments and snaps your exact decimal measurement to the closest segment.
Worked Conversion Examples
- 25 mm ≈ 1" (0.984")
- 16 mm ≈ 5/8" (0.630")
- 6' 2 1/2" = 1892.3 mm
Common Conversions Q&A
Is 16 mm 5/8 inch?
Yes, 16 mm is commonly referred to as 5/8 inch in hardware. Exactly 5/8" is 15.875 mm, meaning 16 mm is only a 0.125 mm difference.
What is 3/4 inch in mm?
3/4 inch is exactly 19.05 mm.
What is 10 mm in inches?
10 mm is exactly 0.3937 inches, which rounds closely to 3/8" (0.375").
Reference Chart: mm to 1/16" & 1/32"
| Millimeters (mm) | Nearest 1/16" | Nearest 1/32" |
|---|---|---|
| 1 mm | 1/16" | 1/32" |
| 5 mm | 3/16" | 3/16" |
| 10 mm | 3/8" | 13/32" |
| 20 mm | 13/16" | 25/32" |
| 50 mm | 1 15/16" | 1 31/32" |
| 100 mm | 3 15/16" | 3 15/16" |
| 500 mm (0.5 m) | 19 11/16" | 19 11/16" |
| 1000 mm (1 m) | 39 3/8" | 39 3/8" |
| 1500 mm (1.5 m) | 59 1/16" | 59 1/16" |
| 2000 mm (2 m) | 78 3/4" | 78 3/4" |
| 2500 mm (2.5 m) | 98 7/16" | 98 7/16" |
| 3000 mm (3 m) | 118 1/8" | 118 1/8" |
| 3500 mm (3.5 m) | 137 13/16" | 137 25/32" |
| 4000 mm (4 m) | 157 1/2" | 157 15/32" |
| 4500 mm (4.5 m) | 177 3/16" | 177 5/32" |
| 5000 mm (5 m) | 196 7/8" | 196 27/32" |
| 5500 mm (5.5 m) | 216 9/16" | 216 17/32" |
| 6000 mm (6 m) | 236 1/4" | 236 7/32" |
| 6500 mm (6.5 m) | 255 7/8" | 255 29/32" |
| 7000 mm (7 m) | 275 9/16" | 275 19/32" |
| 7500 mm (7.5 m) | 295 1/4" | 295 9/32" |
| 8000 mm (8 m) | 314 15/16" | 314 31/32" |
| 8500 mm (8.5 m) | 334 5/8" | 334 21/32" |
| 9000 mm (9 m) | 354 5/16" | 354 11/32" |
| 9500 mm (9.5 m) | 374" | 374 1/32" |
| 10000 mm (10 m) | 393 11/16" | 393 11/16" |
Reference Chart: Common Fractions to mm
| Fractional Inch | Exact Millimeters (mm) |
|---|---|
| 1/64" | 0.3969 mm |
| 1/16" | 1.5875 mm |
| 1/8" | 3.175 mm |
| 1/4" | 6.35 mm |
| 1/2" | 12.7 mm |
| 3/4" | 19.05 mm |
| 1" | 25.4 mm |