Length converter

Feet to inches.

Turn a decimal-foot measurement into the total inches used in an inch-based specification.

Feet (ft)Inch fraction precision

5.5 ft = 66 in

Nearest inch fraction≈ 66 in

Fraction rounding difference-0 mm

Metric length1,676.4 mm

Feet and inches5 ft 6 in

The marker shows the fractional part of one inch. This diagram illustrates tick positions; it is not a physical-size ruler.

Reverse conversion ↔Measure on screen ↗

Conversion formula

inches = feet × 12

Enter the source length above. The result updates immediately. These calculations use exact length definitions: 1 m = 100 cm = 1000 mm, 1 in = 25.4 mm, and 1 ft = 12 in. Only the displayed answer and fractional ruler mark are rounded. The feet-and-inches output splits a length into whole feet and remaining inches; decimal feet do not encode an inch count.

Worked example

5.5 ft is exactly 66 inches. The half foot contributes six inches, so the same reading is 5 ft 6 in. For 5 ft 3 in, enter 5.25 ft; its total is 63 inches. Entering 5.3 ft instead would produce 63.6 inches.

Conversion table: ft → in

Select a source value to load it into the calculator. Decimal results are displayed to at most six places; inch fractions in this table are rounded to 1/16 inch.

Feet → Inches
Feet (ft)	Inches (in)	Nearest inch fraction
	3	≈ 3 in
	6	≈ 6 in
	12	≈ 12 in
	18	≈ 18 in
	24	≈ 24 in
	36	≈ 36 in
	48	≈ 48 in
	60	≈ 60 in
	63	≈ 63 in
	66	≈ 66 in
	72	≈ 72 in
	96	≈ 96 in

When to use this conversion

Use this for long tape readings, furnishing sizes, and specifications that need a single total-inch value. Enter decimal feet or a fraction of a foot, such as 5 1/2. A string containing foot and inch symbols is not accepted because those are two separate quantities.

The definition is twelve inches per foot. For a mixed foot reading, add the remaining inches after multiplying the whole feet by twelve. The fractional-inch display is rounded separately; keep the decimal result if the drawing calls for a specific tolerance.

Exact conversion versus a ruler reading

The unit relationship is exact, but a measured object may have uncertainty. At 1/16 inch, the maximum rounding difference is half a tick: 1/32 inch, or 0.79375 mm. The calculator shows the actual rounding difference for your value. Use a finer division only if the source measurement and physical instrument support that precision.

Next steps

Numerical conversion needs no display calibration. Comparing a physical object against your screen does. Use the ruler for small objects, a verified paper ruler away from your display, or an appropriate calibrated instrument for safety-critical measurements.

Measure on screen Printable ruler PDFs Screen calibration guide How to read a ruler

Related converters

Inches to feet.Split a long inch reading into whole feet and remaining inches, or keep it as a decimal-foot value.Millimeters to inches.Turn a metric measurement into decimal inches and a usable ruler fraction. See how much precision you lose when rounding to a tick mark.Centimeters to inches.Read the decimal answer, find its nearest inch-ruler mark, and keep the rounding difference visible.Meters to inches.Translate a metric length into decimal inches, then choose a fractional tick only if the job permits rounding.Feet to centimeters.Convert a decimal-foot length to centimeters and verify how the fractional foot relates to inches.

Length converters ↗

Reference: NIST unit conversion factors. Calculations use the international foot, not historical survey-foot units. Fractions are explicitly approximate. NIST ↗