Feet to Inches Calculator

Q: How many inches is 5 foot 7?

5 foot 7 is 67 inches . Multiply the feet by 12, then add the extra inches: (5 × 12) + 7 = 60 + 7 = 67. The same trick works for any height: 5 ft 2 in = 62 in 5 ft 10 in = 70 in 6 ft 1 in = 73 in

Q: How many inches are in a yard?

One yard is 36 inches , because a yard is 3 feet and each foot is 12 inches. Quick chart: 1 yard = 3 ft = 36 in 2 yards = 6 ft = 72 in 10 yards = 30 ft = 360 in Half a yard = 18 in

Feet To Inches Calculator

Updated Sep 1, 2026 By Jehan Wadia

Introduction

One foot equals 12 inches. This Feet to Inches Calculator multiplies your feet by 12 and adds any leftover inches. Type in your feet, add extra inches if you have them, and the total inches appear right away.

You can enter whole feet like 5, or decimal feet like 5.75. If your measure is something like 5 ft 3 in, put 5 in the Feet box and 3 in the Inches box. Quick buttons let you add common fractions like ¼, ½, and ¾ of an inch.

The tool shows your answer in four ways: total inches, decimal feet, feet plus fractional inches, and one unit you pick, such as centimeters, meters, yards, or miles. You also get a step-by-step solution so you can see how the answer was found, plus a chart and a table for 1 to 50 feet.

This helps with height, room size, wood cuts, fabric, and school work. Use the Copy button to save your result and use it later.

How to use our Feet to Inches Calculator

Type in your length in feet (and inches if you have them), pick an extra unit, and the calculator shows the total inches, decimal feet, feet with fractional inches, and your chosen unit.

Feet: Type the number of feet. You can use whole numbers or decimals, like 5, 5.5, or 10.75. The limit is 10,000 feet.

Inches (optional): Type only the leftover inches, from 0 to 11.99. For example, for 5 ft 3 in, put 5 in the Feet box and 3 here. You can also tap a fraction button (¼, ½, ¾, ⅛, ⅜, ⅝, ⅞) to add a part of an inch.

Also show result in: Pick the extra unit you want to see, such as millimeters, centimeters, meters, kilometers, yards, miles, feet, or inches.

Calculate and Clear: Results update as you type, but you can press Calculate to run it again. Press Clear to empty the boxes and start over.

Copy Result: Press this to copy all your answers so you can paste them anywhere.

Reference table: Click any row in the 1 to 50 ft table to load that number of feet into the calculator.

Feet to Inches Conversion

A foot and an inch are both units of length in the imperial and US customary systems. One foot equals exactly 12 inches. That number never changes, so changing feet into inches is simple multiplication.

The Formula

Inches = Feet × 12

If your measurement has both parts, like 5 ft 3 in, multiply the feet first, then add the extra inches:

Total inches = (Feet × 12) + Inches

Example: 5 ft 3 in → (5 × 12) + 3 = 60 + 3 = 63 inches.

Quick Examples

1 foot = 12 inches
2 feet = 24 inches
3 feet (1 yard) = 36 inches
5.5 feet = 66 inches
6 feet = 72 inches
10 feet = 120 inches

Decimal Feet vs. Feet and Inches

Feet can be written two ways. Decimal feet look like 5.25 ft. Feet and inches look like 5 ft 3 in. Both mean the same length. To turn the decimal part into inches, multiply it by 12. For 5.25 ft, that is 0.25 × 12 = 3 inches, so 5.25 ft = 5 ft 3 in.

Going Backward

To change inches into feet, divide by 12. For example, 90 ÷ 12 = 7.5 feet, which is 7 ft 6 in.

Inches in Metric Units

One inch is exactly 2.54 centimeters, and one foot is exactly 30.48 centimeters. So 6 feet = 72 inches = 182.88 cm, or about 1.83 meters.

Where People Use This

Feet and inches show up in building and carpentry, room and furniture sizes, height charts, TV and screen sizes, fabric and lumber cutting, and sports fields. Builders often switch everything to inches because it is easier to add and cut with whole numbers instead of decimals. Tape measures also mark fractions like 1/8, 1/4, and 1/2 inch, so knowing the total inch count helps you find the right mark fast.

Formulas used

Total inches from feet and inches

I_{\text{total}} = (f \times 12) + i

Decimal feet from total inches

F_{\text{dec}} = \frac{I_{\text{total}}}{12}

Feet and remaining inches breakdown

ft = \left\lfloor \frac{I_{\text{total}}}{12} \right\rfloor, \quad in_{\text{rem}} = I_{\text{total}} - 12 \cdot ft

Fractional inch rounded to nearest sixteenth

\text{frac} = \frac{\operatorname{round}\left( (in_{\text{rem}} - \lfloor in_{\text{rem}} \rfloor) \times 16 \right)}{16}

Conversion to selected unit via SI base (meters)

V_u = \frac{I_{\text{total}} \times 0.0254}{k_u}

Inch-to-unit conversion factor

k_{\text{in}\to u} = \frac{0.0254}{k_u}

Frequently asked questions

How many inches is 5 foot 7?

5 foot 7 is 67 inches. Multiply the feet by 12, then add the extra inches: (5 × 12) + 7 = 60 + 7 = 67.

The same trick works for any height:

5 ft 2 in = 62 in
5 ft 10 in = 70 in
6 ft 1 in = 73 in

Why are there 12 inches in a foot?

The number 12 comes from old Roman and English measuring systems. The Romans split their foot into 12 parts called unciae, which is where the word inch comes from.

Twelve caught on because it divides evenly by 2, 3, 4, and 6. That makes it easy to split a foot into halves, thirds, and quarters without messy leftovers.

How do you write feet and inches with symbols?

Feet use one mark (') and inches use two marks ("). So 5 feet 8 inches is written 5' 8".

Other ways to write the same thing:

5 ft 8 in
5'8"
68 inches
5.667 feet

Never use the two-mark symbol for feet. That means inches and can cause big mistakes on a plan.

How do you add two measurements in feet and inches?

Add the inches first, then the feet. If the inches add up to 12 or more, carry 12 inches over as 1 foot.

Example: 3 ft 8 in + 2 ft 7 in

8 in + 7 in = 15 in
15 in = 1 ft 3 in
3 ft + 2 ft + 1 ft = 6 ft
Answer: 6 ft 3 in

An easier way is to change both to inches first: 44 in + 31 in = 75 in, then divide by 12 to get 6 ft 3 in.

How many inches are in a yard?

One yard is 36 inches, because a yard is 3 feet and each foot is 12 inches.

Quick chart:

1 yard = 3 ft = 36 in
2 yards = 6 ft = 72 in
10 yards = 30 ft = 360 in
Half a yard = 18 in

What is the fastest way to convert feet to inches in your head?

Multiply by 10, then add double the number of feet. That equals × 12.

Example: 14 feet

14 × 10 = 140
14 × 2 = 28
140 + 28 = 168 inches

For decimal feet, remember the common parts: 0.25 ft = 3 in, 0.5 ft = 6 in, and 0.75 ft = 9 in.

How do you turn a decimal inch into a tape measure fraction?

Multiply the decimal part by 16, round to the closest whole number, and put that over 16. Then simplify.

Example: 4.375 inches

0.375 × 16 = 6
6/16 = 3/8
So 4.375 in = 4 3/8 in

Common ones: 0.125 = 1/8, 0.25 = 1/4, 0.5 = 1/2, 0.625 = 5/8, 0.75 = 3/4.

What is the difference between a linear foot and a square foot?

A linear foot measures length only, in a straight line. A square foot measures area, which is length times width.

A board that is 8 feet long is 8 linear feet, no matter how wide it is. A room that is 10 ft by 12 ft is 120 square feet.

You can change linear feet to inches by multiplying by 12. Square feet change to square inches by multiplying by 144, since 12 × 12 = 144.

Is a US foot the same as a foot in other countries?

Yes, for almost everything. Since 1959 the international foot is exactly 0.3048 meters in the US, UK, Canada, and other countries.

There was one small exception: the old US survey foot, used for land surveys. It was longer by about 2 parts in a million, which is only a fraction of an inch over a mile. The US stopped using it in 2023.

Why do tape measures have red marks every 16 inches?

Those red numbers show standard wall stud spacing. Framers place studs 16 inches apart, from center to center, so the marks fall at 16, 32, 48, 64 inches, and so on.

That spacing lines up with 4-foot wide sheets of drywall and plywood, since 48 inches equals three 16-inch spaces. Some tapes also mark black diamonds every 19.2 inches for 5-joist layouts.

How many inches is a standard 8-foot ceiling?

An 8-foot ceiling is 96 inches tall (8 × 12).

Other common room heights:

9 ft = 108 in
10 ft = 120 in
7 ft door height = 84 in

Standard interior doors are usually 80 inches, or 6 ft 8 in, tall.

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