How to Convert cm to Inches & Inches to cm + Chart

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Quick chart

1 cm = 0.39 in · 5 cm = 1.97 in · 10 cm = 3.94 in · 15 cm = 5.91 in · 20 cm = 7.87 in · 30 cm = 11.81 in · 50 cm = 19.69 in · 100 cm = 39.37 in.

1 in = 2.54 cm · 6 in = 15.24 cm · 12 in (1 ft) = 30.48 cm · 24 in = 60.96 cm.

Mental-math shortcut

Multiply centimetres by 0.4 for a quick estimate: 25 cm × 0.4 ≈ 10 inches (exact: 9.84). For inches to cm, multiply by 2.5: 8 in ≈ 20 cm (exact: 20.32).

Height in feet and inches

Divide cm by 2.54 to get total inches, then divide by 12: 175 cm = 68.9 in = 5 ft 8.9 in.

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Frequently asked questions

Is 1 inch exactly 2.54 cm?

Yes – it has been defined that way since 1959.

How many cm is 6 feet?

182.88 cm.

How do I convert screen sizes?

Screen sizes are diagonal inches – a 15.6-inch screen is 39.6 cm.