1/4 Inch as a Decimal
Answer
0.25 in
1/4 in = 0.25 in = 6.35 mm
1/4 inch is one of the most familiar fractional marks on a tape measure, the second line after the whole inch. As a decimal it equals 0.25 inches, or 6.35 millimeters. It gives its name to the quarter-inch phone jack used on guitar cables and headphones, and it is a common plywood and dowel size, sitting exactly between 3/16 inch (0.1875 in) and 5/16 inch (0.3125 in).
Try another fraction
/
Decimal
0.25
Millimeters
6.35 mm
Related values
| Value | Result |
|---|---|
| Decimal | 0.25 in |
| Millimeters | 6.35 mm |
| Centimeters | 0.635 cm |
| Feet | 0.020833 ft |
How the conversion works
- Divide. Divide the numerator (1) by the denominator (4) to turn the fraction into a decimal.
- Decimal result. 1 ÷ 4 = 0.25. This is an exact, terminating decimal because 4 is a power of two.
- Convert to mm. Multiply 0.25 by 25.4 to convert to millimeters: 0.25 × 25.4 = 6.35 mm, the figure to use when matching a metric spec sheet.
Frequently Asked Questions
1/4 equals 0.25 as a decimal. Divide the numerator, 1, by the denominator, 4, to get this result. It is one of the most recognizable marks on a tape measure, sitting halfway between the whole inch and the 1/2 inch line.
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