Add or subtract lengths in customs (decimal or fraction), feet, centimeters, and 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 also millimeters – all outcomes are in imperial and metric.


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How to include or Subtract Feet & Inches

Adding or individually lengths in feet and inches can seem complicated, yet it’s in reality really easy if you monitor a couple of simple steps. It’s even much easier to include or subtract length measurements using a calculator choose the one above, however follow this easy measures to learn just how to carry out it yourself.


Step One: transform Feet and also Inches come Decimal

The an initial thing to do when adding, subtraction, or doing various other math with inches, feet, and other measurements is to convert all the measurements right into a common unit that measure.

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

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

You can also use an inch fraction calculator come quickly find the decimal value for an inch fraction.


For example:3/8 = 3 ÷ 8 = .375 inches


Convert feet to inches by multiply the variety of feet by 12, due to the fact that there are 12 inches in a foot. Using a feet to 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 convert Values

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

To express the amount or difference value in feet, simply multiply by 12.

The complying with charts simplify the procedure of including and individually fractional inch values together and might be quicker than utilizing a calculator.

Inch fraction Addition Chart

Table reflecting the sum of usual inch fractions. Add a portion from the height heading and first 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 fraction Subtraction Chart

Table mirroring the difference of typical inch fractions. Subtract a portion from the peak heading native the first column; the difference 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″
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 adding length measurements, and we hope you’re feeling confident utilizing the actions above. Learn more about exactly how to include feet and also inches in our detailed guide.

How to multiply or divide Feet & Inches

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

Step One: convert Feet and also Inches come Decimal

The an initial step in multiply or separating is to convert the length measurements to a decimal value. If the length measurements room in feet and also inches, it might be simplest to transform to inches.

Step Two: multiply or Divide

With the length value converted to a decimal, it’s now feasible to main point or divide similar to you would with any decimal number. For example, if your inch value is 1.25 and also you must multiply through 2, simply multiply using 1.25 × 2 = 2.5.

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

Inch portion Multiplication Chart

Table reflecting the multiplication of usual inch fractions. Main point the fraction in the very first column by the top heading’s value; the an outcome is where they intersect.

See more: Which Command Entered Without Arguments Is Used To Display A List Of Processes

× 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 department of usual inch fractions. Division the portion in the first column by the top 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