Feet and Inches Calculator

Add surgery subtract lengths in inches (decimal fraction or fraction), feet, centimeters, and millimeters. Enter equations just like you would write information technology on newspaper, e.g. 4′ 3 7/8″ + 5 cm.

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

Inches, Feet, Divide, Centimeters, and Millimeters Results

0"

Imperial Units

0 Inches (fraction)
0 Inches
0 Feet

Metric Units

0 Millimeters
0 Centimeters
0 Meters


On this page:

  • How to Bring or Subtract Feet and Inches
  • How to Procreate or Divide Feet & Inches
  • Inch Divide and Decimal Equivalents

How to Add or Subtract Feet and Inches

Scheming feet and inches mightiness seem complicated, but adding and subtracting measurements is actually really well-fixed if you follow few peltate stairs. While it's easy to add together operating theatre subtract feet and inches using a measure calculator like the one above, if you follow a fewer basic steps, you can do it yourself!

Step Unrivalled: Win over Feet and Inches to Decimal

The first thing to do when adding, subtracting, or doing different math with inches, feet, and other measurements is to convince complete the measurements into a rough-cut unit of measure. For instance, when reading a tape measure, inches bequeath be in divide form.

Start by converting inch fractions into decimals. Then convert feet, centimeters, and millimeters to inches.

Convert inch fractions to denary by dividing the bottom incomplete of the divide by the behind half on a calculator. If there is a whole number, hyperkinetic syndrome it to the decimal esteem after converting.

You canful also practice an inch fraction calculator to quickly observe the decimal value for an inch fraction.

For example:
3/8 = 3 ÷ 8 = .375 inches

Convince feet to inches by multiplying the numerate of feet away 12, since there are 12 inches in a foot. Using a leg it to inch changeover figurer besides simplifies this step.

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

Try our length convertor to change other units to decimal inches.

Step Two: Add or Subtract the Converted Values

With your feet and edge measurements in an inch decimal form, MBD or subtract them as you normally would, using a reckoner pro re nata. The final outcome will be the length in inches; you can convert the result to any past whole at this point.

To fast the sum operating room difference value in feet, just reproduce by 12.

The following charts simplify the work of adding and subtracting fractional inch values unneurotic and might be faster than using a calculator.

Inch Fraction Addition Chart

Table showing the sum of common inch fractions. Add a fraction from the top 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 1/8″
1/4″ 3/8″ 1/2″ 5/8″ 3/4″ 7/8″ 1″ 1 1/8″ 1 1/4″
3/8″ 1/2″ 5/8″ 3/4″ 7/8″ 1″ 1 1/8″ 1 1/4″ 1 3/8″
1/2″ 5/8″ 3/4″ 7/8″ 1″ 1 1/8″ 1 1/4″ 1 3/8″ 1 1/2″
5/8″ 3/4″ 7/8″ 1″ 1 1/8″ 1 1/4″ 1 3/8″ 1 1/2″ 1 5/8″
3/4″ 7/8″ 1″ 1 1/8″ 1 1/4″ 1 3/8″ 1 1/2″ 1 5/8″ 1 3/4″
7/8″ 1″ 1 1/8″ 1 1/4″ 1 3/8″ 1 1/2″ 1 5/8″ 1 3/4″ 1 7/8″
1″ 1 1/8″ 1 1/4″ 1 3/8″ 1 1/2″ 1 5/8″ 1 3/4″ 1 7/8″ 2″

Inch Divide Subtraction Chart

Table showing the difference of opinion of common inch fractions. Subtract a fraction from the top head from the first column; the difference is where they intersect.
− 1/8″ − 1/4″ − 3/8″ − 1/2″ − 5/8″ − 3/4″ − 7/8″ − 1″
1/8″ 0″ -1/8″ -1/4″ -3/8″ -1/2″ -5/8″ -3/4″ -7/8″
1/4″ 1/8″ 0″ -1/8″ -1/4″ -3/8″ -1/2″ -5/8″ -3/4″
3/8″ 1/4″ 1/8″ 0″ -1/8″ -1/4″ -3/8″ -1/2″ -5/8″
1/2″ 3/8″ 1/4″ 1/8″ 0″ -1/8″ -1/4″ -3/8″ -1/2″
5/8″ 1/2″ 3/8″ 1/4″ 1/8″ 0″ -1/8″ -1/4″ -3/8″
3/4″ 5/8″ 1/2″ 3/8″ 1/4″ 1/8″ 0″ -1/8″ -1/4″
7/8″ 3/4″ 5/8″ 1/2″ 3/8″ 1/4″ 1/8″ 0″ -1/8″
1″ 7/8″ 3/4″ 5/8″ 1/2″ 3/8″ 1/4″ 1/8″ 0″

We've covered the basics of adding length measurements, and we hope you'Re feeling confident victimisation the steps above. Learn more all but how to add feet and inches with our in-depth manoeuver.

How to Multiply or Split Feet & Inches

The steps to breed operating room divide feet and inches are twin to the steps for adding and subtracting to a higher place.

Step Unrivaled: Convert Feet and Inches to Decimal

The firstborn step in multiplying operating theatre dividing is to commute the distance measurements to a decimal value. If the length measurements are in feet and inches, information technology might be easiest to commute to inches.

Step 2: Multiply or Separate

With the length treasure converted to a decimal, it's directly accomplishable to multiply or divide good like you would with whatsoever decimal numeral. For object lesson, if your column inch value is 1.25 and you need to multiply by 2, simply multiply using 1.25 × 2 = 2.5.

The following charts make multiplying Oregon dividing fractional inch values much easier.

Inch Fraction Multiplication Chart

Table showing the multiplication of common inch fractions. Multiply the fraction in the first column by the top heading's time value; the result is where they intersect.
× 2 × 3 × 4 × 5 × 6 × 7 × 8
1/8″ 1/4″ 3/8″ 1/2″ 5/8″ 3/4″ 7/8″ 1″
1/4″ 1/2″ 3/4″ 1″ 1 1/4″ 1 1/2″ 1 3/4″ 2″
3/8″ 3/4″ 1 1/8″ 1 1/2″ 1 7/8″ 2 1/4″ 2 5/8″ 3″
1/2″ 1″ 1 1/2″ 2″ 2 1/2″ 3″ 3 1/2″ 4″
5/8″ 1 1/4″ 1 7/8″ 2 1/2″ 3 1/8″ 3 3/4″ 4 3/8″ 5″
3/4″ 1 1/2″ 2 1/4″ 3″ 3 3/4″ 4 1/2″ 5 1/4″ 6″
7/8″ 1 3/4″ 2 5/8″ 3 1/2″ 4 3/8″ 5 1/4″ 6 1/8″ 7″
1″ 2″ 3″ 4″ 5″ 6″ 7″ 8″

Inch Fraction Part Chart

Table showing the section of usual edge fractions. Dissever the fraction in the first column by the cover heading's evaluate; the result is where they intersect.
÷ 2 ÷ 3 ÷ 4 ÷ 5 ÷ 6 ÷ 7 ÷ 8
1/4″ 1/8″ 5/64″ 1/16″ 3/64″ 1/32″ 1/32″ 1/64″
1/2″ 1/4″ 11/64″ 1/8″ 7/64″ 5/64″ 1/16″ 1/16″
3/4″ 3/8″ 1/4″ 3/16″ 5/32″ 1/8″ 7/64″ 3/32″
1″ 1/2″ 21/64″ 1/4″ 13/64″ 11/64″ 9/64″ 1/8″

Inch Divide and Decimal Equivalents

Sometimes a chart makes things easier: find common inch fractions and equivalent decimal fraction values using this one.

Chart showing decimal values for every inch fraction from 1/64" - 1"

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