Convert inches to centimeters instantly. Includes fraction-to-cm chart (1/8, 1/4, 3/8…), decimal table, and quick conversion buttons.
The most searched fractional inch conversions — essential for DIY, woodworking, and sewing.
❓ Frequently Asked Questions
How many cm is 1 inch?
1 inch = 2.54 cm exactly. This has been the internationally accepted definition since 1959.
How do I convert inches to cm?
Multiply inches by 2.54. For example, 5 inches × 2.54 = 12.7 cm.
What is 1/4 inch in cm?
1/4 inch = 0.635 cm (6.35 mm).
What is 3/8 inch in cm?
3/8 inch = 0.9525 cm (9.525 mm).
How many cm is 5 inches?
5 inches = 12.7 cm.
What is 10 inches in cm?
10 inches = 25.4 cm.
How do you convert fractional inches to cm?
Convert the fraction to decimal first, then multiply by 2.54. For example, 2 3/4 = 2.75 inches → 2.75 × 2.54 = 6.985 cm.