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.

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
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
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
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
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″ |