Free calculator

Feet & Inches Calculator

Add, subtract, multiply and divide field measurements.

Measurement A
Operation
Measurement B
Result
8' 3"
8.25 decimal ft
Feet & inches8' 3"
Inches (total)99"
Centimetres251.46 cm
Millimetres2514.6 mm

What this tool does

Use this calculator for layout, cutting, estimating and drawing checks when measurements contain feet, inches and fractions. Measurements use separate feet, inches and fraction controls. Calculations run locally and results include feet-and-inches, total inches, centimetres and millimetres. Use the separate Feet/Inches & Decimal Converter for CAD decimal values.

Formula

Convert each measurement to inches, apply the operation, then round to the nearest 1/16 inch.

Examples

5' 8" + 2' 7"

8' 3"

12' 0" ÷ 3

4' 0"

Frequently asked questions

How are fractions rounded?

Results are rounded to the nearest one-sixteenth of an inch.

Can the result be negative?

Yes. Subtraction can return a negative measurement.

Professional workflow

Manage the work behind the measurements

PMO Engine gives project teams one connected place to track delivery, risks, stakeholders and execution work.

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