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Type a measurement in centimetres and read it in inches immediately — the conversion is exact by definition, since the inch has been defined as 25.4 mm since 1959. Handy for clothing sizes, furniture listings, screen sizes and any spec sheet that crossed the Atlantic. The swap button reverses direction for inches to cm.
Frequently asked questions
What's the formula for cm to inches?
Divide by 2.54: 100 cm ÷ 2.54 = 39.37 inches. For a rough mental check, 10 cm ≈ 4 inches and 30 cm ≈ a foot.
How do I convert to feet and inches?
Divide cm by 2.54 for total inches, then split by 12: 175 cm = 68.9 in = 5 ft 8.9 in. The length converter also offers feet directly.