5/16 Inch as a Decimal
Answer
0.3125 in
5/16 in = 0.3125 in = 7.9375 mm
5/16 inch is a fine gradation between 1/4 inch (0.25 in) and 3/8 inch (0.375 in) on a tape measure or machinist rule. As a decimal it equals 0.3125 inches, or 7.9375 millimeters. It is a very common bolt head and socket size, and it doubles as the standard tap drill for a 3/8-16 machine thread, so it shows up constantly on mechanics' and machinists' benches.
Try another fraction
/
Decimal
0.3125
Millimeters
7.9375 mm
Related values
| Value | Result |
|---|---|
| Decimal | 0.3125 in |
| Millimeters | 7.9375 mm |
| Centimeters | 0.7937 cm |
| Feet | 0.026042 ft |
How the conversion works
- Divide. Divide the numerator (5) by the denominator (16) to convert the fraction into a decimal.
- Decimal result. 5 ÷ 16 = 0.3125. This is an exact, terminating decimal since 16 is a power of two.
- Convert to mm. Multiply the decimal by 25.4, the number of millimeters in one inch: 0.3125 × 25.4 = 7.9375 mm, useful when matching a metric drawing or drill bit to an imperial part.
Frequently Asked Questions
5/16 equals 0.3125 as a decimal. Divide the numerator, 5, by the denominator, 16, to get this result. It is a fine gradation between 1/4 inch and 3/8 inch on a tape measure or machinist rule.
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