Convert ft to in Instantly
Use this Feet to Inches converter to change any length in feet (ft) into inches (in) for construction, concrete dimensions, room measurements, woodworking, furniture, drawings, height and everyday measuring. Because one foot contains exactly twelve inches, the conversion is direct and reliable.
Convert feet to inches, reverse inches to feet, compare multiple length units, or combine feet and extra inches into one measurement.
Enter a length in feet to calculate inches plus useful equivalents in yards, centimeters and meters.
Decimals are accepted, such as 5.5 ft or 2.25 ft.
Reverse the conversion by dividing inches by twelve. The result includes decimal feet and a feet-plus-inches breakdown.
Start with feet, inches, yards, meters, centimeters or millimeters and see equivalent lengths in all common units.
Enter whole or decimal feet plus extra inches to combine a mixed measurement into total inches, decimal feet, yards and metric units.
Extra inches may be greater than 12; the tool normalizes the total.
A foot and an inch are both units of length used in the U.S. customary system and in many everyday applications where imperial-style measurements are familiar. The relationship between the two is exact: one foot contains twelve inches. That means converting feet to inches does not require an approximation, a complicated formula, or a rounded conversion constant. You simply multiply the value in feet by twelve.
This Feet to Inches calculator is useful when a drawing, tape measure, room dimension, construction note, furniture specification, height measurement or material size is stated in feet but another part of the job uses inches. For example, an 8-foot board is 96 inches long, a 6-foot wall section is 72 inches, and 2.5 feet is 30 inches. The same relationship works for very small decimal values and large project dimensions.
Because the factor is exact, any uncertainty in the final result comes from the original measurement, not from the unit conversion. If you measured a length only to the nearest quarter inch, converting the corresponding feet value to many decimal places does not make the measurement more precise.
Start with the original measurement. For example, suppose a wall, board or slab edge is 7.5 feet long.
Use the exact relationship 1 foot = 12 inches. For 7.5 feet, calculate 7.5 × 12.
7.5 × 12 = 90, so 7.5 feet equals exactly 90 inches.
The chart below lists common feet-to-inches values. It also shows yards and centimeters so you can compare customary and metric lengths without doing a second calculation. On small screens, the table is placed inside a horizontally scrollable wrapper so every column remains usable.
| Feet | Inches | Yards | Centimeters |
|---|---|---|---|
| 0.25 ft | 3 in | 0.0833 yd | 7.62 cm |
| 0.5 ft | 6 in | 0.1667 yd | 15.24 cm |
| 0.75 ft | 9 in | 0.25 yd | 22.86 cm |
| 1 ft | 12 in | 0.3333 yd | 30.48 cm |
| 1.5 ft | 18 in | 0.5 yd | 45.72 cm |
| 2 ft | 24 in | 0.6667 yd | 60.96 cm |
| 2.5 ft | 30 in | 0.8333 yd | 76.2 cm |
| 3 ft | 36 in | 1 yd | 91.44 cm |
| 4 ft | 48 in | 1.3333 yd | 121.92 cm |
| 5 ft | 60 in | 1.6667 yd | 152.4 cm |
| 6 ft | 72 in | 2 yd | 182.88 cm |
| 7 ft | 84 in | 2.3333 yd | 213.36 cm |
| 8 ft | 96 in | 2.6667 yd | 243.84 cm |
| 9 ft | 108 in | 3 yd | 274.32 cm |
| 10 ft | 120 in | 3.3333 yd | 304.8 cm |
| 12 ft | 144 in | 4 yd | 365.76 cm |
| 15 ft | 180 in | 5 yd | 457.2 cm |
| 20 ft | 240 in | 6.6667 yd | 609.6 cm |
| 25 ft | 300 in | 8.3333 yd | 762 cm |
| 50 ft | 600 in | 16.6667 yd | 1,524 cm |
| 100 ft | 1,200 in | 33.3333 yd | 3,048 cm |
For a value that is not listed, enter it into the calculator above. Decimal feet are especially easy to convert because the same ×12 rule applies without any additional step.
The ruler below divides a single foot into twelve equal one-inch sections. The full distance stays the same; only the unit used to describe it changes.
Construction is one of the most common situations where feet and inches appear in the same project. Overall room, wall, slab or footing dimensions may be written in feet, while thicknesses, offsets, anchor locations, form heights and material sizes are shown in inches. Converting everything to one unit can reduce mistakes when dimensions are multiplied, compared or transferred to a tape measure.
Suppose a rectangular slab is 12 feet long and 8 feet wide. Those dimensions are 144 inches by 96 inches. If the slab thickness is 4 inches, using inches consistently can be helpful when checking form dimensions or detailing. For volume calculations, however, you should use a consistent length unit and then convert the resulting cubic unit correctly. A linear feet-to-inches conversion should never be applied directly to square feet or cubic feet because area and volume use squared and cubed relationships.
If you are estimating a square slab, use the Square Concrete Calculator. For unit changes involving concrete dimensions, you may also use Meters to Feet, Millimeters to Inches, or Inches of Concrete to Millimeters. Keeping the dimension unit clear at every step is more important than doing the arithmetic quickly.
A frequent source of confusion is the difference between decimal feet and the familiar feet-and-inches notation. A value such as 5.5 feet does not mean 5 feet 5 inches. The decimal part represents a fraction of one foot. Because half of a foot is 6 inches, 5.5 feet equals 5 feet 6 inches, or 66 total inches.
To convert a decimal-foot measurement to mixed feet and inches, keep the whole-foot portion and multiply only the decimal portion by 12. For example, 8.25 feet has 8 whole feet and 0.25 foot remaining. Since 0.25 × 12 = 3, the mixed measurement is 8 feet 3 inches. Similarly, 6.75 feet becomes 6 feet 9 inches.
The reverse process works the same way. To express 5 feet 9 inches as decimal feet, divide 9 inches by 12 to get 0.75 foot, then add the 5 whole feet. The result is 5.75 feet. The fourth calculator on this page automates this process and is useful for takeoffs, elevations, surveying notes, fabrication dimensions and any worksheet that prefers decimal feet.
The reverse conversion uses division instead of multiplication. Since every foot contains 12 inches, divide the number of inches by 12 to get decimal feet. For example, 84 inches ÷ 12 = 7 feet. If the inch value is not a multiple of twelve, the decimal-foot result will include a fraction. Seventy-eight inches divided by twelve equals 6.5 feet, which is the same as 6 feet 6 inches.
For mixed notation, divide the total inches by 12 and keep the whole-number quotient as feet. The remainder is the number of inches left over. For 77 inches, twelve fits into 77 six full times, accounting for 72 inches. The remaining 5 inches means the measurement is 6 feet 5 inches. The reverse calculator above shows both the decimal-foot result and the mixed feet-and-inches form.
Feet-to-inches conversion is exact, but real measurements often include fractions. A carpenter may record 5 feet 7 1/2 inches, while a digital drawing may store the same dimension in decimal feet. When converting fractional inches, retain enough precision to match the work. One-half inch is 0.5 in, one-quarter inch is 0.25 in, one-eighth inch is 0.125 in and one-sixteenth inch is 0.0625 in.
If a decimal-foot value creates a repeating or awkward inch decimal, avoid rounding too early. For example, a calculated measurement may become 3.333333 feet. Multiplying the decimal part by 12 gives almost 4 inches. If you round 3.333333 to 3.3 feet first, the converted inch portion becomes 3.6 inches, which is materially different. Keep the original value through the calculation and round the final measurement to the resolution your project actually uses.
For everyday room dimensions, a tenth or hundredth of an inch may be unnecessary. For fabrication, machining, cabinetry or precision layouts, much finer resolution may be required. The calculator preserves decimals, but the appropriate final rounding depends on the measurement method and specification.
Human height is often written in feet and inches, such as 5 ft 8 in or 6 ft 2 in. Converting that format to total inches is useful for forms, sports data, medical records, sizing charts and comparisons. Multiply the feet by 12, then add the extra inches. A height of 5 ft 8 in is 5 × 12 + 8 = 68 inches. A height of 6 ft 2 in is 74 inches.
Be careful with decimal notation. A height of 5.8 feet is not the same as 5 ft 8 in. The decimal 0.8 foot equals 9.6 inches, so 5.8 feet corresponds to 5 ft 9.6 in, or 69.6 total inches. When a source uses the apostrophe and quotation-mark symbols—5′ 8″—it usually means five feet and eight inches, not a decimal number.
The combined Feet + Inches panel is especially useful for this type of entry because it keeps the two components separate and then reports the total inches and decimal feet.
Woodworking and home improvement frequently mix feet and inches because lumber lengths may be sold in feet while cut lists and clearances are specified in inches. An 8-foot board is 96 inches long, making it easier to subtract cuts such as 22 inches, 31.5 inches or 14.25 inches when every value is expressed in the same unit. Furniture dimensions, cabinet openings, shelves, trim, curtains and appliance clearances are also commonly given in inches.
For planning, convert the stock length into inches first, subtract the required cut lengths, and then convert any remaining length back to feet and inches if desired. Remember to account for saw kerf, trimming and other fabrication allowances separately; those are project factors, not part of the unit conversion.
For larger outdoor measurements you may prefer feet or yards because the numbers are shorter. Use Yards to Feet or Feet to Centimeters when a project crosses unit systems.
A very important distinction is that feet to inches is a length conversion. One foot equals 12 inches. Area uses two dimensions, so one square foot is not 12 square inches. Instead, a square measuring 1 foot by 1 foot measures 12 inches by 12 inches, giving 144 square inches. Volume uses three dimensions, so one cubic foot contains 12 × 12 × 12 = 1,728 cubic inches.
This dimensional difference explains why you should identify whether a number represents length, area or volume before choosing a conversion factor. If your value is in square feet, use the Square Feet to Square Inches converter. If it is in cubic feet, use the Cubic Feet to Cubic Inches conversion instead of multiplying by twelve.
1 ft = 12 in.
1 ft² = 144 in².
1 ft³ = 1,728 in³.
Match the factor to the dimension type.
Continue with other tools when your starting measurement uses a different unit. Use Inches to Feet for the direct reverse conversion, Yards to Feet for larger customary lengths, Meters to Feet when moving from metric to U.S. customary units, Millimeters to Inches for small dimensions, and Centimeters to Feet for metric measurements.
For authoritative unit-definition background, see the NIST guidance on length units and the BIPM SI Brochure. These sources explain the internationally defined relationships that connect customary length units to the SI meter.
Feet to inches uses ×12. Division by 12 is for inches to feet.
5.5 ft means 5 ft 6 in, not 5 ft 5 in.
Square feet to square inches requires ×144, not ×12.
Cubic feet to cubic inches requires ×1,728.
Confirm that the number is a linear length in feet, not square feet or cubic feet.
Distinguish decimal feet such as 5.75 ft from mixed notation such as 5′ 9″.
For a feet-to-inches conversion, use inches = feet × 12.
Keep useful precision through the calculation and report a result appropriate for the measurement.
Quick answers to common ft-to-in conversion questions.