Inches to Cm Converter
Convert inches to centimetres instantly. Free online inches to cm converter with common conversion values.
Formula
cm = inches × 2.54
Common Conversions
How to Convert Inches to Centimetres
1 inch = 2.54 cm exactly. Multiply inches by 2.54 to get centimetres. So 12 in × 2.54 = 30.48 cm. The exact factor of 2.54 has been the international definition since 1959, making this a precise conversion with no rounding error.
Most common for converting American measurements to metric: TV sizes (55-inch TV = 139.7 cm diagonal), height (5'10" = 178 cm), shoe lengths. American DIY measurements default to inches; converting to cm/mm helps when buying European materials.
Common Inches to Centimetres Conversions
| Inches | Centimetres |
|---|---|
| 1 in | 2.54 cm |
| 6 in | 15.24 cm |
| 12 in (1 ft) | 30.48 cm |
| 24 in | 60.96 cm |
| 36 in (1 yd) | 91.44 cm |
| 48 in | 121.92 cm |
| 60 in (5 ft) | 152.4 cm |
| 72 in (6 ft) | 182.88 cm |
Frequently Asked Questions
How big is a 65-inch TV?
65 inches measured diagonally = 165.1 cm. The actual width is roughly 56 in (142 cm) and height 32 in (81 cm) for a 16:9 widescreen. Always check the published dimensions before buying for fit.
What's the difference between 'inch' and 'in'?
Same thing. 'in' is the abbreviation for 'inch'. Plural is 'inches' (or 'in' still in technical writing). The double-prime mark (") is also used: 5'10" means 5 feet 10 inches.
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