Add or subtract lengths in customs (decimal or fraction), feet, centimeters, and millimeters. Get in equations just like you would write it on paper, e.g. 4′ 3 7/8″ + 5 cm.

You are watching: 2 7/8 divided by 2

See the outcomes 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 individually lengths in feet and inches can seem complicated, but it’s in reality really straightforward if you monitor a few simple steps. It’s even easier to add or subtract length measurements using a calculator prefer the one above, however follow this easy measures to learn exactly how to execute it yourself.


Step One: convert Feet and also Inches come Decimal

The very first thing to do as soon as adding, subtraction, or doing various other math through inches, feet, and other measurements is to transform all the measurements right into a usual unit the measure.

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

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

You can also use one inch portion calculator come quickly uncover 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 by 12, since there space 12 inches in a foot. Using a feet come inches switch calculator also simplifies this step.


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


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

Step Two: add or Subtract the converted Values

With all dimensions in an customs decimal form, add or subtract all measurements as you usually would, making use of a calculator as needed. The final result will be the length in inches; girlfriend can transform the result to any kind of other unit at this point.

To express the amount or difference value in feet, just multiply through 12.

The following charts simplify the process of adding and individually fractional inch values together and also might be faster than making use of a calculator.

Inch portion Addition Chart

Table showing the sum of typical inch fractions. Include a fraction from the height heading and first column; the sum 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 mirroring the difference of common inch fractions. Subtract a portion from the peak heading indigenous the first column; the difference 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 spanned the basics of including length measurements, and also we expect you’re emotion confident utilizing the steps above. Learn an ext about how to include feet and also inches in our comprehensive guide.

How to main point or division Feet & Inches

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

Step One: transform Feet and also Inches come Decimal

The an initial step in multiplying or separating is to transform the size measurements to a decimal value. If the size measurements space in feet and also inches, it can be most basic 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 as with you would certainly with any kind of decimal number. Because that example, if her inch value is 1.25 and also you need to multiply by 2, simply multiply making use of 1.25 × 2 = 2.5.

The following charts do multiplying or splitting fractional customs values much easier.

Inch fraction Multiplication Chart

Table reflecting the multiplication of common inch fractions. Main point the portion in the first column by the peak heading’s value; the result is whereby 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 department of usual inch fractions. Division the portion in the very first column through the height heading’s value; the result is wherein 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 portion and Decimal Equivalents