Add or subtract lengths in inch (decimal or fraction), feet, centimeters, and also millimeters. Enter equations similar to you would write the on paper, e.g. 4′ 3 7/8″ + 5 cm.

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See the results in inches, feet, centimeters, and millimeters – all outcomes are in imperial and also metric.


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How to add or Subtract Feet & Inches

Adding or subtracting lengths in feet and also inches might seem complicated, yet it’s in reality really basic if you monitor a couple of simple steps. It’s even easier to include or subtract length measurements making use of a calculator like the one above, yet follow this easy steps to learn how to execute it yourself.


Step One: transform Feet and Inches to Decimal

The first thing come do as soon as adding, subtraction, or doing other math through inches, feet, and other dimensions is to convert all the measurements into a common unit that measure.

Start through converting inch fractions right into decimal. Then transform feet, centimeters, and millimeters come inches.

Convert customs fractions to decimal by separating the bottom half of the fraction by the bottom half on a calculator. If over there is a whole number, add it come the decimal worth after converting.

You can additionally use one inch portion calculator to quickly discover the decimal worth for an customs fraction.


For example:3/8 = 3 ÷ 8 = .375 inches


Convert feet come inches by multiplying the number of feet by 12, because there space 12 inch in a foot. Utilizing a feet to inches conversion calculator additionally simplifies this step.


For example:3 feet = 3 × 12 = 36 inches


Try ours other length conversion calculators to convert other units to decimal inches.

Step Two: add or Subtract the convert Values

With all dimensions in an customs decimal form, include or subtract all measurements as you normally would, utilizing a calculator together needed. The final an outcome will it is in the length in inches; friend can transform the an outcome to any other unit in ~ this point.

To express the sum or distinction value in feet, simply multiply by 12.

The complying with charts simplify the procedure of including and subtracting fractional inch values together and might be faster than making use of a calculator.

Inch portion Addition Chart

Table mirroring the sum of usual inch fractions. Add a fraction from the optimal heading and an initial column; the sum is where they intersect.+ 1/8″+ 1/4″+ 3/8″+ 1/2″+ 5/8″+ 3/4″+ 7/8″+ 1″1/8″1/4″3/8″1/2″5/8″3/4″7/8″1″
1/4″3/8″1/2″5/8″3/4″7/8″1″1 1/8″
3/8″1/2″5/8″3/4″7/8″1″1 1/8″1 1/4″
1/2″5/8″3/4″7/8″1″1 1/8″1 1/4″1 3/8″
5/8″3/4″7/8″1″1 1/8″1 1/4″1 3/8″1 1/2″
3/4″7/8″1″1 1/8″1 1/4″1 3/8″1 1/2″1 5/8″
7/8″1″1 1/8″1 1/4″1 3/8″1 1/2″1 5/8″1 3/4″
1″1 1/8″1 1/4″1 3/8″1 1/2″1 5/8″1 3/4″1 7/8″
1 1/8″1 1/4″1 3/8″1 1/2″1 5/8″1 3/4″1 7/8″2″

Inch portion Subtraction Chart

Table showing the distinction of typical inch fractions. Subtract a portion from the top heading indigenous the an initial column; the distinction is whereby they intersect.− 1/8″− 1/4″− 3/8″− 1/2″− 5/8″− 3/4″− 7/8″− 1″1/8″1/4″3/8″1/2″5/8″3/4″7/8″1″
0″-1/8″-1/4″-3/8″-1/2″-5/8″-3/4″-7/8″
1/8″0″-1/8″-1/4″-3/8″-1/2″-5/8″-3/4″
1/4″1/8″0″-1/8″-1/4″-3/8″-1/2″-5/8″
3/8″1/4″1/8″0″-1/8″-1/4″-3/8″-1/2″
1/2″3/8″1/4″1/8″0″-1/8″-1/4″-3/8″
5/8″1/2″3/8″1/4″1/8″0″-1/8″-1/4″
3/4″5/8″1/2″3/8″1/4″1/8″0″-1/8″
7/8″3/4″5/8″1/2″3/8″1/4″1/8″0″

We’ve extended the basics of including length measurements, and also we hope you’re feeling confident using the steps above. Learn much more about exactly how to include feet and inches in our detailed guide.

How to multiply or divide Feet & Inches

The procedures to multiply or divide feet and inches are similar to the steps for adding and individually above.

Step One: convert Feet and also Inches to Decimal

The first step in multiplying or dividing is to transform the length measurements to a decimal value. If the size measurements room in feet and also inches, it can be easiest to convert to inches.

Step Two: main point or Divide

With the size value convert to a decimal, it’s now feasible to main point or divide similar to you would certainly with any type of decimal number. Because that example, if your inch worth is 1.25 and you need to multiply through 2, merely multiply making use of 1.25 × 2 = 2.5.

The complying with charts make multiplying or dividing fractional inch values lot easier.

Inch portion Multiplication Chart

Table reflecting the multiplication of common inch fractions. Main point the portion in the an initial column by the height heading’s value; the an outcome is wherein they intersect.

See more: How Many Inches Are In 5 Centimeters To Inches, How Many Inches Are 5 Centimeters

× 2× 3× 4× 5× 6× 7× 81/8″1/4″3/8″1/2″5/8″3/4″7/8″1″
1/4″3/8″1/2″5/8″3/4″7/8″1″
1/2″3/4″1″1 1/4″1 1/2″1 3/4″2″
3/4″1 1/8″1 1/2″1 7/8″2 1/4″2 5/8″3″
1″1 1/2″2″2 1/2″3″3 1/2″4″
1 1/4″1 7/8″2 1/2″3 1/8″3 3/4″4 3/8″5″
1 1/2″2 1/4″3″3 3/4″4 1/2″5 1/4″6″
1 3/4″2 5/8″3 1/2″4 3/8″5 1/4″6 1/8″7″
2″3″4″5″6″7″8″

Inch Fraction department Chart

Table showing the division of typical inch fractions. Division the portion in the first column by the optimal heading’s value; the an outcome is where they intersect.÷ 2÷ 3÷ 4÷ 5÷ 6÷ 7÷ 81/4″1/2″3/4″1″
1/8″5/64″1/16″3/64″1/32″1/32″1/64″
1/4″11/64″1/8″7/64″5/64″1/16″1/16″
3/8″1/4″3/16″5/32″1/8″7/64″3/32″
1/2″21/64″1/4″13/64″11/64″9/64″1/8″

Inch fraction and Decimal Equivalents