0.8125 as a Fraction of an Inch
Answer
13/16 in
0.8125 in = 13/16 in (1/64 in) = 20.6375 mm
0.8125 inches equals 13/16 inch, most familiar as the size of a standard spark plug socket found in nearly every automotive toolbox. It also appears on fractional drill and tap drill charts for larger fasteners. Sitting exactly between 3/4 in (0.75 in) and 7/8 in (0.875 in), it stays 13/16 in whether you round to 1/16, 1/32, or 1/64 precision.
Try another decimal
Nearest 1/16
13/16"
Nearest 1/32
13/16"
Millimeters
20.6375 mm
Related values
| Value | Result |
|---|---|
| Nearest 1/8 in | 7/8 in |
| Nearest 1/16 in | 13/16 in |
| Nearest 1/32 in | 13/16 in |
| Nearest 1/64 in | 13/16 in |
| Millimeters | 20.6375 mm |
| Centimeters | 2.0638 cm |
| Feet | 0.067708 ft |
How the conversion works
- Split the decimal. Separate the whole-number part from the decimal part. 0.8125 has no whole-number portion, so the entire value converts into the fraction.
- Multiply by precision. Multiply the decimal by the denominator you want, 16, 32, or 64, then round to the nearest whole number. 0.8125 × 16 = 13 exactly, with nothing left to round.
- Simplify. Reduce the fraction using the greatest common divisor of numerator and denominator. 13 and 16 share no common factor, so 13/16 is already in lowest terms.
- Verify in mm. Multiply the decimal inches by 25.4 to check the metric value: 0.8125 × 25.4 = 20.6375 mm.
Frequently Asked Questions
0.8125 inches equals 13/16 in. That answer is exact at 1/16, 1/32, and 1/64 precision because 0.8125 is already a whole number of sixteenths.
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13/16 Inch as Decimal
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