3/8 Inch as a Decimal
Answer
0.375 in
3/8 in = 0.375 in = 9.525 mm
3/8 inch is best known as the size of a 3/8 inch drive ratchet and socket set, the most common drive size for general DIY and light automotive work. As a decimal it equals 0.375 inches, or 9.525 millimeters, sitting exactly midway between 5/16 inch (0.3125 in) and 7/16 inch (0.4375 in). It is also a standard plywood and dowel thickness in cabinetry.
Try another fraction
/
Decimal
0.375
Millimeters
9.525 mm
Related values
| Value | Result |
|---|---|
| Decimal | 0.375 in |
| Millimeters | 9.525 mm |
| Centimeters | 0.9525 cm |
| Feet | 0.03125 ft |
How the conversion works
- Divide. Divide the numerator (3) by the denominator (8) to convert the fraction into a decimal.
- Decimal result. 3 ÷ 8 = 0.375. This is an exact, terminating decimal because 8 is a power of two.
- Convert to mm. Multiply the decimal by 25.4, the number of millimeters in one inch: 0.375 × 25.4 = 9.525 mm, useful when matching a metric drawing or drill bit to an imperial part.
Frequently Asked Questions
3/8 equals 0.375 as a decimal. Divide the numerator, 3, by the denominator, 8, to get this result. It is a common mark on a tape measure, sitting between the 1/4 inch and 1/2 inch lines.
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