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How to Calculate Feet & Inches

What is Feet & Inches?

Height and length are commonly measured in feet and inches in the UK, US, and other countries using the imperial system. Converting between imperial (feet/inches) and metric (centimetres/metres) is essential for medical, architectural, and everyday use.

Formula

To convert cm to feet: divide by 30.48 → integer part is feet, decimal × 12 = inches
To
inches — inches

Step-by-Step Guide

  1. 11 foot = 12 inches = 30.48 centimetres
  2. 21 inch = 2.54 centimetres
  3. 3To convert feet and inches to cm: (feet × 30.48) + (inches × 2.54)
  4. 4To convert cm to feet: divide by 30.48 → integer part is feet, decimal × 12 = inches

Worked Examples

Input
5 feet 10 inches
Result
177.8 cm
(5 × 30.48) + (10 × 2.54) = 152.4 + 25.4 = 177.8
Input
180 cm
Result
5 feet 10.87 inches
180 / 30.48 = 5.906 feet → 5ft + 0.906×12 = 10.87"

Frequently Asked Questions

What is Feet Inches?

Height and length are commonly measured in feet and inches in the UK, US, and other countries using the imperial system. Converting between imperial (feet/inches) and metric (centimetres/metres) is essential for medical, architectural, and everyday use

How accurate is the Feet Inches calculator?

The calculator uses the standard published formula for feet inches. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Feet Inches calculator use?

This calculator works with centimetres, inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Feet Inches calculator use?

The core formula is: 1 foot = 12 inches = 30.48 centimetres. Each step in the calculation is shown so you can verify the result manually.

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