12 Inches to Centimetres
12 inches is exactly 30.48 cm.
12 inches = 30.48 cm
Type in either box. Inches also take fractions and feet: 1 1/2, 3/4, 5'7", 5 ft 7 in.
How to convert 12 inches to cm
Multiply by 2.54, the exact number of centimetres in an inch:
12 in × 2.54 = 30.48 cm
No rounding is involved — the inch is defined as 2.54 cm, so 30.48 cm is the exact answer, not an approximation. In millimetres that is 304.8 mm, and in metres 0.3048 m.
Twelve inches is one foot, so 12 in = 1 ft = 30.48 cm exactly. It is also why a "12-inch" ruler is a little longer than a 30 cm one — by 4.8 mm.
12 inches in other units
| Centimetres | 30.48 cm |
| Millimetres | 304.8 mm |
| Metres | 0.3048 m |
| Feet and inches | 1 ft 0 in |
| Feet | 1 ft |
Inches to cm near 12
| Inches | Centimetres |
|---|---|
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 8 in | 20.32 cm |
| 10 in | 25.4 cm |
| 12 in | 30.48 cm |
| 14 in | 35.56 cm |
| 15 in | 38.1 cm |
| 16 in | 40.64 cm |
| 17 in | 43.18 cm |
Need a different value? Type it into the converter above, or go back to the full cm to inches converter.
Frequently asked questions
How many centimetres is 12 inches?
12 inches is exactly 30.48 centimetres. One inch is defined as 2.54 cm, so multiply 12 by 2.54.
How do I estimate 12 inches in cm without a calculator?
Multiply by 2.5, then add a little: 12 × 2.5 = 30, and the exact answer of 30.48 cm is 1.6% higher. For most everyday purposes, 2.5 is close enough.