How to Convert cm to Inches (Formula, Table & Examples)

To convert centimeters to inches, divide the number of centimeters by 2.54. For example, 10 cm ÷ 2.54 = 3.94 inches. To go the other way, multiply inches by 2.54 to get centimeters.

The formula

• inches = cm ÷ 2.54
• cm = inches × 2.54

One inch is defined as exactly 2.54 centimeters, so the conversion is exact, not an approximation.

Quick reference

• 1 cm = 0.39 in
• 5 cm = 1.97 in
• 10 cm = 3.94 in
• 20 cm = 7.87 in
• 30 cm = 11.81 in
• 50 cm = 19.69 in
• 100 cm = 39.37 in

Converting height

Height is the most common reason people convert cm to inches. Divide by 2.54 to get total inches, then split into feet and inches (12 inches per foot):

• 170 cm = 66.9 in ≈ 5 ft 7 in
• 180 cm = 70.9 in ≈ 5 ft 11 in

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