Conversion
Feet to Inches
Convert feet to inches instantly — type a value and watch it convert live, with the formula, the working shown step by step, and lookup charts for heights, lumber, and rooms.
Convert feet to inches
ft ↔ in× 12
6 ft equals
72in
ft
6
in
72
per ft
12
Edit either field — the other updates live.
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The basics
What does the conversion mean?
Feet and inches are both imperial length units — the inch is just a finer slice of the same ruler. Because the relationship is a definition, not a measurement, there is no rounding: any number of feet converts to a perfectly exact number of inches.
1 ft = 12 in exactly
The inch is twelfth of a foot
One foot was historically divided into twelve equal parts — the inches. That ratio of twelve is baked into the definition, so converting is nothing more than scaling by a whole number.
6 ft = 72 in
× 12
One multiplication does it all
There is no offset, no rounding, no approximation. Multiply the feet by twelve and you have the inches. Reverse the trip by dividing inches by twelve.
5 ft = 60 in
Method
How to convert feet to inches by hand
Three steps cover every case — whole feet, mixed heights, and going back the other way.
- 1
Multiply whole feet by 12
Take the number of feet and multiply by the conversion factor. The result is all those feet expressed as inches.
6 ft × 12 = 72 in - 2
Add any leftover inches
For a mixed measurement (feet + inches), add the leftover inch count to the result from step one. Multiplying the leftover inches is the most common mistake — just add them.
(5 × 12) + 8 = 68 in - 3
Sanity-check the size
The inch figure should be twelve times larger than the foot figure. If you converted 5 ft and got something smaller than 60, you divided instead of multiplied.
5 ft → 60 in ✓
Quick chart
Feet to inches lookup table
Looking up a specific value? Browse the tabs for whole feet, common heights, and the reverse inches-to-feet direction.
ft
in
1 ft
12 in
2 ft
24 in
3 ft
36 in
4 ft
48 in
5 ft
60 in
6 ft
72 in
7 ft
84 in
8 ft
96 in
9 ft
108 in
10 ft
120 in
Where it shows up
When you actually need this
Three everyday situations where knowing the total number of inches saves you a calculation mid-task.
5 ft 8 in = 68 in
Heights & medical forms
Medical records, fitness apps, and travel documents often ask for height in total inches rather than feet and inches separately. Converting up-front prevents entry errors on forms that accept only one number.
8 ft = 96 in
Lumber & DIY room dimensions
Standard lumber lengths and ceiling heights are given in feet, but saw blades and tape measures often read in inches. Knowing that an eight-foot stud is exactly ninety-six inches avoids mid-cut arithmetic.
55 in diagonal
Screen, TV & furniture sizing
Screen sizes, sofa depths, and clearance measurements are spec'd in inches while room plans are drawn in feet. A quick conversion keeps both worlds in sync when you're buying a television or fitting a corner sectional.
Reference
Common feet-to-inches benchmarks
Landmarks worth knowing by heart — each converts with the same factor of twelve the tool uses.
Item
ft
in
One foot
1
12
Three feet (a yard)
3
36
Average adult height (approx.)
5
60
Tall adult height (approx.)
6
72
Standard ceiling height
8
96
Ten feet
10
120
Worth knowing
Facts worth remembering
A handful of anchors that make feet-to-inch arithmetic almost automatic.
1 ft = 12 in exactly
The relationship is a definition
The conversion factor is not a rounded approximation. One foot is exactly twelve inches by definition — there is no measurement error, ever.
3 ft = 1 yard = 36 in
Yards connect the two units
Three feet make one yard, which is thirty-six inches. Useful for fabric, fencing, and field measurements where yards are the natural unit but inches are needed for cuts.
(ft × 12) + in
Mixed heights: multiply then add
To convert a mixed height, multiply the feet part by twelve and then add the leftover inches. The addition step is what trips people up — the leftover inches are not multiplied.
5 ft 8 in → (5 × 12) + 8 = 68 in
in ÷ 12
Reverse: inches back to feet
To go the other direction, divide total inches by twelve. When the result has a remainder, that leftover is the inch count — so seventy inches is five feet and ten inches.
84 in ÷ 12 = 7 ft
1 in = 2.54 cm
The metric bridge
One inch is exactly 2.54 centimeters (also a definition, not an approximation), which makes one foot exactly 30.48 cm. The chain inches → feet → cm → meters is all exact arithmetic.
1 ft = 30.48 cm
12 in = 1 ft
Twelve is the anchor
The number twelve is why fractions of a foot — half, third, quarter — work out cleanly in inches. Half a foot is six inches, a third is four, a quarter is three — all whole numbers, no rounding needed.
36 in = 3 ft = 1 yard
Related units
Where feet and inches sit in the imperial chain
Feet and inches do not stand alone — they connect upward to yards and miles, and sideways to the metric system through an exact defined bridge.
12 in → 1 ft → 3 ft = 1 yd → 5,280 ft = 1 mi
The imperial length chain
Twelve inches make one foot. Three feet make one yard. Five thousand, two hundred and eighty feet make one mile. Each step is a fixed whole-number ratio — no approximations anywhere in the imperial length chain.
1 in = 2.54 cm · 1 ft = 30.48 cm
The metric bridge is exact
Since 1959, one inch has been defined as exactly 2.54 centimeters. This makes every feet-to-meters conversion exact as well — one foot is 0.3048 meters, with no rounding at any step.
Common mistakes
Where conversions go wrong
Three slips that produce a wrong answer — easy to avoid once you can name them.
add, don't multiply
Multiplying the leftover inches
In a mixed height like five feet eight inches, only the feet are multiplied by twelve. The eight inches are added. Multiplying them gives ninety-six, which adds far too much to the total.
× 12, not × 10
Using 10 instead of 12
The decimal habit can make people multiply by ten instead of twelve. Feet have twelve inches — not ten. Six feet is seventy-two inches, not sixty.
5'8" = 5 ft 8 in, not 5.8 ft
Reading foot-inch notation as a decimal
The notation five-foot-eight (5'8") is five feet and eight inches, not the decimal 5.8 feet. Treating it as 5.8 ft gives 69.6 inches instead of the correct 68 inches.
FAQ
Common questions
There are exactly 12 inches in one foot. This is a defined relationship — not an approximation — so the conversion is always precise and produces an exact integer when the feet value is a whole number.
Five feet is 5 × 12 = 60 inches. Adding extra inches on top gives the full total — so 5 ft 6 in is 66 inches, and 5 ft 11 in is 71 inches.
Convert the feet first: 5 × 12 = 60, then add the 8 leftover inches: 60 + 8 = 68 inches. The key step is multiplying the whole feet — then adding, not multiplying, the remaining inches.
Multiply the feet portion by 12 and add the leftover inches. For 6 ft 2 in: (6 × 12) + 2 = 72 + 2 = 74 inches. For 5 ft 10 in: (5 × 12) + 10 = 70 inches. The formula is always (feet × 12) + remaining inches.
No. The notation 5'8" means 5 feet and 8 inches — not 5.8 feet. 5.8 feet would be 5 ft 9.6 in (since 0.8 × 12 = 9.6). Always treat the second number in foot-inch notation as whole inches, not a decimal fraction of a foot.
Divide the total inches by 12. For example, 72 ÷ 12 = 6 feet. If the result isn't a whole number, the integer part is the feet and the remainder is the leftover inches — so 68 ÷ 12 = 5 remainder 8, which is 5 ft 8 in.
Six feet is 6 × 12 = 72 inches. This is a useful benchmark: a person who is exactly 6 ft tall is 72 inches tall.
Yes. Because 1 inch is defined as exactly 2.54 cm, and there are 12 inches in a foot, 1 foot = 12 × 2.54 = 30.48 cm exactly. The relationship is defined, not measured, so there is no rounding error.
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Ugo CharlesBuilt and fact-checked against our editorial standards · Last updated June 2026
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