Calculators / Measuring and costs
Feet and inches calculator
Type lengths the way you read them off the tape, fractions and all. You'll get the answer back the same way, plus decimals and metric.
Updated · How we check our numbers
Difference
9 ft 6 7/8 in
That's 114 7/8 in, or 114.875 in as a decimal.
- Inches
- 114.875
- Feet
- 9.573
- Millimeters
- 2917.8
- Meters
- 2.918
Estimate for planning only, not professional advice. Check the manufacturer’s instructions, your local code and a licensed professional before you buy, build or install. Use at your own risk. Terms.
first = 12 ft × 12 + 7.375 in = 151.375 in
second = 3 ft × 12 + 0.5 in = 36.5 in
151.375 − 36.5 = 114.875 in
mm = 114.875 in × 25.4 = 2917.8 mm
Tape measure fractions
to decimals and mm- 1/16 in0.0625 in, 1.6 mm0.063
- 1/8 in0.1250 in, 3.2 mm0.125
- 3/16 in0.1875 in, 4.8 mm0.188
- 1/4 in0.2500 in, 6.4 mm0.250
- 5/16 in0.3125 in, 7.9 mm0.313
- 3/8 in0.3750 in, 9.5 mm0.375
- 7/16 in0.4375 in, 11.1 mm0.438
- 1/2 in0.5000 in, 12.7 mm0.500
- 9/16 in0.5625 in, 14.3 mm0.563
- 5/8 in0.6250 in, 15.9 mm0.625
- 11/16 in0.6875 in, 17.5 mm0.688
- 3/4 in0.7500 in, 19 mm0.750
- 13/16 in0.8125 in, 20.6 mm0.813
- 7/8 in0.8750 in, 22.2 mmYours
- 15/16 in0.9375 in, 23.8 mm0.938
1 in = 25.4 mm exactly.
How we work it out
Everything goes to inches first, then the math, then back to feet and inches.
inches = feet × 12 + inches
The answer rounds to the nearest 1/16 in, the smallest mark on most tapes, and reduces it: 8/16 shows as 1/2. Type fractions as 7 3/8 or 7-3/8. An inch is exactly 25.4 mm.
Where the numbers come from
Reference
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