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100 mm = 3.937 in
Worked example
100 ÷ 25.4 = 3.937 inches. On a ruler marked in sixteenths, that is about 3 15/16″; in thirty-seconds, 3 15/16″; in sixty-fourths, 3 15/16″. The nearest 1/16 mark (3 15/16″ = 100.01 mm) is off by 0.01 mm.
100 mm is also 10 cm and 0.328 feet.
| Millimeters | Inches | Nearest 1/16 |
|---|---|---|
| 95 mm | 3.7402 | 3 3/4″ |
| 96 mm | 3.7795 | 3 3/4″ |
| 97 mm | 3.8189 | 3 13/16″ |
| 98 mm | 3.8583 | 3 7/8″ |
| 99 mm | 3.8976 | 3 7/8″ |
| 100 mm | 3.937 | 3 15/16″ |
| 101 mm | 3.9764 | 4″ |
| 102 mm | 4.0157 | 4″ |
| 103 mm | 4.0551 | 4 1/16″ |
| 104 mm | 4.0945 | 4 1/8″ |
| 105 mm | 4.1339 | 4 1/8″ |
Frequently asked questions
How many inches is 100 mm?
3.937 inches, about 3 15/16″.
What fraction of an inch is 100 mm?
About 3 15/16″ to the nearest 1/32.