Enter your First Measurement (in feet and inches), choose an operation (add, subtract, multiply, or divide), then enter your Second Measurement to get your result — rounded to your liking — plus the answer broken down as total inches and decimal feet.
Result
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Total Inches
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Decimal Feet
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The standard symbols are a single prime (′) for feet and double prime (″) for inches. In everyday writing, you can use a single quote (') for feet and double quote (") for inches.
Yes, exactly. There are 12 inches in 1 foot. This is a fixed conversion in the imperial measurement system.
To convert feet to inches, multiply the number of feet by 12. For example, 3 feet = 3 × 12 = 36 inches.
Add the feet separately from the inches. If the inches total 12 or more, convert every 12 inches to 1 foot and add to the feet total.
Yes, you can use fractions, decimals, or mixed numbers for inches. For example, 5' 7.5" or 5' 7 1/2" are both valid measurements.
Convert everything to inches first, perform the multiplication, then convert back to feet and inches. Alternatively, convert to decimal feet, multiply, then convert back.
Decimal inches use decimals (like 7.75 inches), while fractional inches use fractions (like 7 3/4 inches). Both represent the same measurement.