Convert inches to feet instantly using the exact relationship 12 inches = 1 foot. Enter a total number of inches to get decimal feet, reverse the conversion from feet to inches, split total inches into feet-and-inches notation, or combine feet plus inches into one decimal-foot value. The calculator keeps the maths visible so you can check every conversion.
Use a direct inches-to-feet conversion, reverse it, split total inches into mixed feet and inches, or combine a mixed measurement into decimal feet.
Your converted length will appear after you press Convert Length.
Conversions use exact 12 inches per foot and 2.54 centimetres per inch relationships.
A foot is divided into 12 equal inches. Converting inches to feet means grouping the inch measurement into sets of twelve.
The tool provides decimal feet, total inches, mixed feet-and-inches notation and centimetres so one measurement can be reused across plans, calculators and product specifications.
Enter or review a total measurement using inches.
Divide inches by 12 to get a single decimal-foot value.
Split a total inch measurement into whole feet plus remaining inches.
See the same length in centimetres using 2.54 cm per inch.
Convert feet back into total inches when a drawing or tool uses a different unit.
Save the original measurement and converted values with ConcreteCreek.com branding.
Converting inches to feet is one of the simplest imperial length conversions because one foot contains exactly 12 inches. To convert a measurement in inches into decimal feet, divide the inch value by 12. The calculator above performs that division and can also express the same length as whole feet plus the remaining inches.
Feet = Inches ÷ 12
For example, 24 inches ÷ 12 = 2 feet. A measurement of 30 inches ÷ 12 = 2.5 feet. A measurement of 42 inches ÷ 12 = 3.5 feet. Whole multiples of 12 convert to whole feet, while values between those multiples create decimal feet.
The inch and foot are traditional imperial/US customary length units linked by a fixed 12-to-1 relationship. For conversion purposes, that means the ratio is exact: 12 inches equal 1 foot and 1 inch equals one-twelfth of a foot.
Because the conversion is exact, any difference you see in a displayed decimal result comes from rounding, not from uncertainty in the relationship itself. Keeping more decimal places is useful when the converted value will be used in another calculation.
| Inches | Decimal Feet | Feet + Inches | Centimetres |
|---|---|---|---|
| 1 in | 0.083333 ft | 0 ft 1 in | 2.54 cm |
| 6 in | 0.5 ft | 0 ft 6 in | 15.24 cm |
| 12 in | 1 ft | 1 ft 0 in | 30.48 cm |
| 18 in | 1.5 ft | 1 ft 6 in | 45.72 cm |
| 24 in | 2 ft | 2 ft 0 in | 60.96 cm |
| 30 in | 2.5 ft | 2 ft 6 in | 76.20 cm |
| 36 in | 3 ft | 3 ft 0 in | 91.44 cm |
| 48 in | 4 ft | 4 ft 0 in | 121.92 cm |
| 60 in | 5 ft | 5 ft 0 in | 152.40 cm |
| 72 in | 6 ft | 6 ft 0 in | 182.88 cm |
| 96 in | 8 ft | 8 ft 0 in | 243.84 cm |
| 120 in | 10 ft | 10 ft 0 in | 304.80 cm |
Reverse conversion is multiplication. Multiply the number of feet by 12 to get total inches. Two feet equals 24 inches, 2.5 feet equals 30 inches and 7.25 feet equals 87 inches.
Inches = Feet × 12
The reverse mode is useful when a product sheet, cutting list or site note uses inches but your starting dimension is in decimal feet. It also provides a quick way to check an inches-to-feet result by converting it back.
Decimal feet and feet-and-inches notation describe the same length in different formats. 2.5 ft is the same as 2 ft 6 in. 3.25 ft is the same as 3 ft 3 in. 4.75 ft is the same as 4 ft 9 in. Decimal feet are often easier for multiplication and engineering calculations, while mixed feet-and-inches notation is familiar on site.
The Total Inches → ft + in mode gives whole feet plus the remainder. It is useful when you have a tape measurement such as 53 inches and want to express it as 4 ft 5 in.
Divide total inches by 12 and keep the whole-number part as feet. The remainder becomes inches. For 53 inches, 12 fits into 53 four whole times, using 48 inches. The remaining 5 inches gives 4 ft 5 in.
If the input contains a decimal fraction of an inch, the remainder can also be decimal. For example, 53.5 inches becomes 4 ft 5.5 in.
To combine a mixed measurement, divide the inch part by 12 and add it to the whole feet. For 6 ft 3 in, 3 ÷ 12 = 0.25, so the result is 6.25 ft. For 8 ft 9 in, 9 ÷ 12 = 0.75, so the result is 8.75 ft.
This conversion is especially helpful when a formula requires one consistent unit. A concrete volume formula, for example, is easier to calculate when every length dimension is expressed as one decimal value rather than a mixture of feet and inches.
| Inches | Fraction Of A Foot | Decimal Feet | Typical Mixed Example |
|---|---|---|---|
| 1 in | 1/12 ft | 0.083333 ft | 5 ft 1 in = 5.083333 ft |
| 2 in | 1/6 ft | 0.166667 ft | 5 ft 2 in = 5.166667 ft |
| 3 in | 1/4 ft | 0.25 ft | 5 ft 3 in = 5.25 ft |
| 4 in | 1/3 ft | 0.333333 ft | 5 ft 4 in = 5.333333 ft |
| 6 in | 1/2 ft | 0.5 ft | 5 ft 6 in = 5.5 ft |
| 8 in | 2/3 ft | 0.666667 ft | 5 ft 8 in = 5.666667 ft |
| 9 in | 3/4 ft | 0.75 ft | 5 ft 9 in = 5.75 ft |
| 11 in | 11/12 ft | 0.916667 ft | 5 ft 11 in = 5.916667 ft |
Building plans, product specifications and imported tools sometimes mix inches and feet. Converting everything into one unit before calculating reduces errors. Length × width calculations, concrete volume, timber cut lists and spacing layouts are easier to audit when every dimension follows the same unit convention.
If you are calculating concrete, remember that a linear conversion is only the first step. A slab or footing needs length, width and thickness/depth. Use the Concrete Volume Calculator or Ready Mix Concrete Calculator after your dimensions are consistent.
Concrete thickness is often discussed in inches in US-based guides but metres or millimetres in Australia. If you need feet for a cubic-foot calculation, divide the thickness in inches by 12. A 4-inch slab is 0.333333 ft thick. A 6-inch slab is 0.5 ft thick.
For metric volume, it is usually better to convert inches directly to millimetres or metres rather than moving through feet. One inch equals exactly 25.4 mm, so 4 inches equals 101.6 mm.
Interior measurements are often recorded as feet plus inches, such as 12 ft 7 in. Converting to decimal feet can simplify floor-area calculations: 12 ft 7 in equals approximately 12.583333 ft. Multiply that by the decimal-foot width to get square feet.
If you ultimately need metric area, convert the finished square-foot area using the Square Feet to Square Metres converter rather than converting each area result informally.
Timber and board dimensions may be specified in inches while overall cut lengths are in feet. Converting can help when adding repeated cuts, comparing stock lengths or preparing estimates. Keep fractional or decimal inch precision until the final cut list is confirmed.
Be careful not to confuse nominal product size with actual manufactured dimensions. A unit conversion can be mathematically correct while the product assumption is wrong.
Human height is commonly expressed in feet and inches rather than decimal feet. A height of 70 inches is 5 ft 10 in, while the decimal-foot value is approximately 5.833333 ft. Mixed notation is easier to read for everyday height, but decimal feet may be useful in formulas.
The calculator lets you see both formats at the same time, so you do not need to choose one permanently.
Product dimensions from international retailers may use inches while room plans use feet or metres. Converting width, height and depth into a consistent unit helps with clearance checks. For example, a 36-inch-wide appliance is 3 ft wide.
For metric compatibility checks, the result panel also shows centimetres. Thirty-six inches equals 91.44 cm.
Pipe and duct diameters are often given in inches, while route lengths are given in feet or metres. Do not convert diameter into feet unless the formula actually requires consistent length units. For cross-sectional area or volume calculations, unit consistency becomes especially important because the dimension may be squared or cubed.
A simple length converter does not automatically convert square inches to square feet or cubic inches to cubic feet. Those use squared and cubed conversion factors.
Inches to feet is a linear conversion. Square inches to square feet is an area conversion, where the factor is 12² = 144. One square foot equals 144 square inches. Do not divide square inches by 12 and call the result square feet.
Likewise, cubic inches to cubic feet uses 12³ = 1,728. Keeping track of whether a measurement is length, area or volume prevents a common category of conversion errors.
For quick checking, remember common multiples of 12: 12 in = 1 ft, 24 in = 2 ft, 36 in = 3 ft, 48 in = 4 ft, 60 in = 5 ft and 72 in = 6 ft. Half a foot is 6 inches, one-quarter foot is 3 inches and three-quarters foot is 9 inches.
These reference points make it easy to sense-check calculator results. If 30 inches returns 2.5 ft, the result matches 24 inches plus 6 inches = 2 ft plus 0.5 ft.
Some inch values produce repeating decimal feet. One inch is 0.083333... ft, five inches is 0.416666... ft and ten inches is 0.833333... ft. Rounding these too early can create small errors when several dimensions are multiplied or added.
Keep extra decimal places during calculations and round only the final displayed or purchase value. The converter lets you select two, three, four or six decimal places for direct conversions.
| Example | Calculation | Decimal Feet | Mixed Result |
|---|---|---|---|
| 15 in | 15 ÷ 12 | 1.25 ft | 1 ft 3 in |
| 27 in | 27 ÷ 12 | 2.25 ft | 2 ft 3 in |
| 33 in | 33 ÷ 12 | 2.75 ft | 2 ft 9 in |
| 50 in | 50 ÷ 12 | 4.166667 ft | 4 ft 2 in |
| 65 in | 65 ÷ 12 | 5.416667 ft | 5 ft 5 in |
| 78 in | 78 ÷ 12 | 6.5 ft | 6 ft 6 in |
| 100 in | 100 ÷ 12 | 8.333333 ft | 8 ft 4 in |
| 144 in | 144 ÷ 12 | 12 ft | 12 ft 0 in |
Every numeric field starts empty. The faint blurred zero is only a visual placeholder and is not stored as the field value. If you type 24, the converter receives 24 rather than 024. Typed values appear sharp and readable.
Reset clears the numeric fields and restores the placeholder state. This keeps the converter visually clean without creating a leading-zero problem.
Door, window and rough-opening dimensions are often shown in inches, while wall lengths and room dimensions may be recorded in feet. Converting opening dimensions to decimal feet can make area calculations easier when you need to subtract openings from wall area. For example, a 36-inch-wide door is 3 ft wide, and an 80-inch-high door is approximately 6.666667 ft high.
When estimating plasterboard, cladding, paint or masonry area, keep the opening dimensions in one consistent unit before multiplying width by height. Do not convert the final square-inch result with the linear 12:1 factor; area conversion uses a squared factor.
Stair risers and goings are commonly discussed in millimetres in Australia, but imported plans and calculators may use inches. Converting an inch dimension to feet can be useful when combining it with overall stair runs shown in feet. A 7.5-inch riser is 0.625 ft, while an 11-inch going is approximately 0.916667 ft.
The conversion does not determine whether a stair dimension is compliant. Stair geometry, rise, going, headroom, landings and handrails must still follow the applicable project requirements.
Fence-post spacing and panel widths may be supplied in inches, particularly for imported systems. Converting to feet can make a long fence layout easier to add and compare with site measurements. A 96-inch panel is 8 ft wide, while a 72-inch panel is 6 ft wide.
If you later need concrete for post holes, convert the actual hole diameter and depth consistently before calculating cylindrical volume. The Concrete Post Hole Calculator can be used after the dimensions are confirmed.
Cabinet modules, appliance clearances and benchtop depths may arrive from international product sheets in inches. Converting them into decimal feet can help when a room plan or estimating spreadsheet is already using feet. A 24-inch cabinet depth is 2 ft, while a 30-inch depth is 2.5 ft.
For fabrication, however, inches or millimetres are often more practical because they preserve fine detail without long repeating decimals. Use decimal feet mainly when the downstream formula or drawing convention requires it.
Equipment heights, widths and clearances are often listed in inches. Converting can help compare the same item with room dimensions in feet. A 84-inch height is 7 ft; 90 inches is 7.5 ft; 102 inches is 8.5 ft.
When checking whether equipment fits through a door or under a ceiling, compare like with like. Either convert the equipment to feet or convert the room opening to inches, but avoid mixing the two without a clear conversion step.
| Inches | Feet | Feet + Inches | Metres |
|---|---|---|---|
| 144 in | 12 ft | 12 ft 0 in | 3.6576 m |
| 180 in | 15 ft | 15 ft 0 in | 4.5720 m |
| 240 in | 20 ft | 20 ft 0 in | 6.0960 m |
| 300 in | 25 ft | 25 ft 0 in | 7.6200 m |
| 360 in | 30 ft | 30 ft 0 in | 9.1440 m |
| 480 in | 40 ft | 40 ft 0 in | 12.1920 m |
Decimal feet are especially useful in spreadsheets, CAD calculations, estimating formulas and repeated multiplication because the measurement behaves as one number. A value such as 12.75 ft can be multiplied directly by width or quantity without first splitting the foot and inch components.
Mixed notation is often easier to read on a tape measure and in site communication. The right format depends on the task. This converter shows both so you can calculate in decimal feet while still communicating a familiar feet-and-inches dimension.
A simple reverse check is to multiply the decimal-foot answer by 12. If 84 inches converts to 7 ft, then 7 × 12 returns 84 inches. For a non-whole result such as 50 inches, the calculator gives approximately 4.166667 ft; multiplying that by 12 returns approximately 50 inches, subject only to display rounding.
Another quick check is to compare with nearby multiples of 12. If a measurement is slightly more than 48 inches, the answer should be slightly more than 4 ft. If it is slightly less than 60 inches, it should be slightly less than 5 ft.
Feet-and-inches notation is not a base-10 decimal. The inch portion is based on twelve inches per foot. Six inches is therefore 6/12 = 0.5 ft, making 5 ft 6 in equal 5.5 ft. Writing 5.6 ft actually means 5 ft plus 0.6 of a foot, and 0.6 ft equals 7.2 inches.
This distinction is one of the most common sources of mistakes when site measurements are copied into spreadsheets. Always convert the inch portion by dividing by 12 before adding it to the whole feet.
Changing inches to feet changes the number and unit, not the physical length.
Twelve inches make one foot exactly.
One foot is the same physical length as twelve inches.
One foot also equals exactly 30.48 centimetres.
Divide inches by twelve to get decimal feet.
Quick answers about inches, feet, decimal feet, mixed notation, rounding and construction conversions.
Divide the number of inches by 12. For example, 36 inches ÷ 12 = 3 feet.
There are exactly 12 inches in 1 foot.
24 inches equals exactly 2 feet.
30 inches equals 2.5 feet, or 2 ft 6 in.
36 inches equals exactly 3 feet.
48 inches equals exactly 4 feet.
60 inches equals exactly 5 feet.
100 inches equals approximately 8.333333 feet, or 8 ft 4 in.
Divide the inches by 12 and add the result to the whole feet. For example, 5 ft 6 in = 5 + 6/12 = 5.5 ft.
No. Six inches is half a foot, so 5 ft 6 in equals 5.5 ft.
The blurred zero is only a placeholder. It is not a real value, so typing 24 gives 24 rather than 024. Typed values remain clear.
Yes for linear conversion, but concrete volume still requires length, width and thickness in consistent units.
Use the exact 12 inches per foot relationship and standard metric relationships when moving between imperial and metric dimensions.
1 foot = 12 inches exactly, so inches are converted to feet by dividing by 12.
1 inch = 2.54 centimetres exactly, which also makes 1 foot = 30.48 centimetres.
Use the converter above for direct inches ↔ feet calculations and mixed feet-and-inches notation.