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

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


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How to include or Subtract Feet & Inches

Adding or individually lengths in feet and also inches might seem complicated, yet it’s actually really simple if you follow a few simple steps. It’s even less complicated to add or subtract size measurements using a calculator like the one above, yet follow these easy steps to learn exactly how to execute it yourself.


Step One: convert Feet and also Inches come Decimal

The first thing to do when adding, subtraction, or doing various other math with inches, feet, and other measurements is to transform all the measurements into a usual unit of measure.

Start by converting customs fractions into decimal. Then convert feet, centimeters, and millimeters to inches.

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

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


For example:3/8 = 3 ÷ 8 = .375 inches


Convert feet come inches by multiplying the number of feet through 12, because there room 12 inches in a foot. Using a feet come inches conversion calculator also simplifies this step.


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


Try our other size conversion calculators to transform other units to decimal inches.

Step Two: include or Subtract the converted Values

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

To refer the amount or distinction value in feet, merely multiply by 12.

The adhering to charts leveling the procedure of adding and individually fractional inch worths together and might be faster than using a calculator.

Inch portion Addition Chart

Table showing the sum of typical inch fractions. Add a fraction from the peak heading and very first column; the amount is wherein 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 peak heading indigenous the first column; the distinction 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″
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 covered the basics of including length measurements, and also we hope you’re feeling confident making use of the procedures above. Learn an ext about how to add feet and inches in our thorough guide.

How to main point or divide Feet & Inches

The procedures to main point or division feet and also inches are similar to the actions for including and individually above.

Step One: convert Feet and also Inches come Decimal

The first step in multiply or separating is to convert the size measurements to a decimal value. If the length measurements room in feet and inches, it could be easiest to convert to inches.

Step Two: main point or Divide

With the length value converted to a decimal, it’s now feasible to multiply or divide as with you would with any type of decimal number. For example, if her inch worth is 1.25 and you should multiply by 2, merely multiply utilizing 1.25 × 2 = 2.5.

The adhering to charts do multiplying or dividing fractional inch values much easier.

Inch fraction Multiplication Chart

Table reflecting the multiplication of common inch fractions. Main point the portion in the very first column through the height heading’s value; the an outcome is where they intersect.

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× 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 division Chart

Table reflecting the division of typical inch fractions. Division the fraction in the an initial column through the optimal heading’s value; the an outcome is whereby 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