inches to feet calculator
An inches to feet calculator divides inches by 12: 100 inches is 8.333 feet, which is 2.778 yards or 254.0 centimeters, handy for plans and orders.
Inches to feet calculator formula
An inches to feet calculator divides your measurement by 12, because there are 12 inches in a foot. The formula is feet = inches ÷ 12.
Enter a number of inches and the calculator also shows yards (inches ÷ 36) and centimeters (inches × 2.54). The default of 100 inches gives 8.333 feet, 2.778 yards and 254.0 cm.
If you want feet and inches instead of a decimal, take the whole number of feet and multiply the leftover decimal by 12. For 8.333 feet, that is 8 feet and 0.333 × 12 = 4 inches.
Worked examples
Example 1 is a fence panel, 100 inches long.
- 100 ÷ 12 = 8.333 feet
- 100 ÷ 36 = 2.778 yards
- 100 × 2.54 = 254.0 centimeters
- As feet and inches: 8 feet 4 inches
Example 2 is a countertop cutout, 67 inches wide.
- 67 ÷ 12 = 5.583 feet
- 67 ÷ 36 = 1.861 yards
- 67 × 2.54 = 170.2 centimeters
- As feet and inches: 5 feet 7 inches
Common conversions
| Inches | Feet | Yards | Centimeters |
|---|---|---|---|
| 6 | 0.500 | 0.167 | 15.2 |
| 10 | 0.833 | 0.278 | 25.4 |
| 12 | 1.000 | 0.333 | 30.5 |
| 18 | 1.500 | 0.500 | 45.7 |
| 24 | 2.000 | 0.667 | 61.0 |
| 30 | 2.500 | 0.833 | 76.2 |
| 36 | 3.000 | 1.000 | 91.4 |
| 48 | 4.000 | 1.333 | 121.9 |
| 96 | 8.000 | 2.667 | 243.8 |
| 120 | 10.000 | 3.333 | 304.8 |
Some numbers worth knowing on a job site: a 4×8 sheet is 48 by 96 inches, a standard door is often 80 inches (6 ft 8 in) high, and a 2×4 stud is commonly cut at 92 5/8 inches for an 8 ft wall with a double top plate and one bottom plate.
A third example, stair rise
Stair totals are a classic case where every number is in inches. Say the finished floor is 105 inches above the floor below.
- 105 ÷ 12 = 8.75 feet
- 8.75 feet is 8 feet 9 inches
- 105 ÷ 7.5 inches per riser = 14 risers
The riser height in this example is 7.5 inches, which you can check against your local code, since maximum riser and minimum tread limits are set locally. The point is that once the total is in inches, the feet figure is just a quick division for your plans and your material orders.
Fractions of an inch
Tape measures show eighths and sixteenths, so you often need to turn something like 37 3/8 inches into feet. Convert the fraction to a decimal first.
| Fraction | Decimal |
|---|---|
| 1/8 | 0.125 |
| 1/4 | 0.25 |
| 3/8 | 0.375 |
| 1/2 | 0.5 |
| 5/8 | 0.625 |
| 3/4 | 0.75 |
| 7/8 | 0.875 |
So 37 3/8 inches is 37.375 inches, and 37.375 ÷ 12 = 3.115 feet. Enter 37.375 into the calculator.
How to measure
- Hook the tape on the edge and pull it straight. A sagging tape reads long.
- Read the number at the end of the run in inches. Write down the inches, not a mix of feet and inches, to keep the arithmetic simple.
- For long runs, measure in sections and add the inches before you convert.
- Write the unit next to every number. A note that says 36 could mean inches or yards.
Common mistakes
- Treating 5 feet 7 inches as 5.7 feet. It is 5.583 feet, because 7 inches is 0.583 of a foot.
- Entering feet in an inches box, or the other way round. A result that looks 12 times off is the clue.
- Dividing by 10 instead of 12 when working in your head.
- Rounding too early. If you round 8.333 to 8.3 on a 120 foot run, you are off by about 4 inches.
- Forgetting that depth for materials like gravel and mulch is usually in inches while area is in feet.
Related calculators
For the reverse direction, use the feet to inches calculator. Metric dimensions convert with the cm to inches calculator and the mm to inches calculator, and longer runs are easier with the feet to yards calculator.
Frequently asked questions
How many inches are in a foot?
Twelve. To convert inches to feet, divide by 12. So 36 inches is 3 feet, 100 inches is 8.333 feet, and 6 inches is 0.5 feet. To go the other way, multiply feet by 12.
Why would a measurement start in inches but need to be in feet?
Tape measures, lumber lengths and drawings mix the two units. Gravel, mulch and concrete calculators want length and width in feet but depth in inches, and a quote for fence or trim is priced per foot. Converting once, up front, avoids a 12 times error.
How do I convert an odd measurement like 5 feet 7 inches?
Change the whole thing to inches first, then divide by 12. 5 feet 7 inches is 5 × 12 + 7 = 67 inches, and 67 ÷ 12 = 5.583 feet. The decimal is not 5.7, because the 7 inches is seven twelfths of a foot, not seven tenths.
What's the centimeter conversion used for?
It helps when plans, product specs or imported materials are metric. The calculator multiplies inches by 2.54, so 100 inches is 254.0 cm. It shows the result with one decimal place, which is plenty for ordering.
Is this the same for depth measurements, like gravel or mulch depth?
Yes. A 4 inch depth is 4 ÷ 12 = 0.333 feet. Our volume calculators take depth in inches and divide by 12 for you, but if you work by hand, convert before you multiply or the volume comes out 12 times too large.
Estimates only. Verify quantities with your supplier before purchasing.