Inches to CM Converter
Convert inches to centimeters instantly with a reference table for common measurements.
Conversion table
| Inches (in) | Centimeters | Meters | Millimeters |
|---|---|---|---|
| 1 | 2.54 cm | 0.0254 m | 25.4 mm |
| 2 | 5.08 cm | 0.0508 m | 50.8 mm |
| 3 | 7.62 cm | 0.0762 m | 76.2 mm |
| 4 | 10.16 cm | 0.1016 m | 101.6 mm |
| 5 | 12.7 cm | 0.127 m | 127 mm |
| 10 | 25.4 cm | 0.254 m | 254 mm |
| 15 | 38.1 cm | 0.381 m | 381 mm |
| 20 | 50.8 cm | 0.508 m | 508 mm |
| 25 | 63.5 cm | 0.635 m | 635 mm |
| 30 | 76.2 cm | 0.762 m | 762 mm |
| 40 | 101.6 cm | 1.016 m | 1,016 mm |
| 50 | 127 cm | 1.27 m | 1,270 mm |
| 60 | 152.4 cm | 1.524 m | 1,524 mm |
| 70 | 177.8 cm | 1.778 m | 1,778 mm |
| 75 | 190.5 cm | 1.905 m | 1,905 mm |
💡 Conversion Tips
- Multiply inches by 2.54 to get centimeters — this is an exact conversion.
- Quick estimate: multiply inches by 2.5 for a rough cm value.
- 12 inches = 1 foot = 30.48 cm exactly.
- Common screen sizes: 27" = 68.58 cm, 32" = 81.28 cm, 55" = 139.7 cm.
How to Convert Inches to Centimeters
The Inches to CM Formula
Common Inches to CM Conversions
- 1 inch = 2.54 cm exactly — the fundamental conversion factor
- 12 inches = 30.48 cm (1 foot)
- 36 inches = 91.44 cm (1 yard)
- 39.37 inches ≈ 100 cm (1 meter)
- 63,360 inches = 1 mile = 160,934 cm
- Fraction conversion: 1/4" = 0.635 cm, 1/2" = 1.27 cm, 3/4" = 1.905 cm
Screen Size Conversions
- 24 inches = 60.96 cm — popular desktop monitor size
- 27 inches = 68.58 cm — standard desktop monitor
- 32 inches = 81.28 cm — large monitor or small TV
- 43 inches = 109.22 cm — medium TV for bedrooms
- 55 inches = 139.7 cm — most popular living room TV size
- 65 inches = 165.1 cm — large living room TV
Inches to CM Examples
Step-by-step conversions
Convert 5'10" height to cm
- 5 feet = 5 × 12 = 60 inches
- Total = 60 + 10 = 70 inches
- 70 × 2.54 = 177.8 cm
- Or: 5 ft × 30.48 = 152.4 cm
- Plus: 10 in × 2.54 = 25.4 cm
- Total: 152.4 + 25.4 = 177.8 cm
5'10" = 70 inches = 177.8 cm
Convert 8.5 × 11 inches (US Letter) to cm
- Width: 8.5 × 2.54 = 21.59 cm
- Height: 11 × 2.54 = 27.94 cm
- Compare to A4: 21.0 × 29.7 cm
- US Letter is slightly wider
- A4 is slightly taller
US Letter = 21.59 × 27.94 cm
Frequently Asked Questions
How many cm is 1 inch?
1 inch equals exactly 2.54 centimeters. This is an exact definition, not an approximation. To convert any inch measurement to centimeters, multiply by 2.54.
How do I convert feet and inches to cm?
First convert feet to inches by multiplying by 12, then add the remaining inches. Finally, multiply total inches by 2.54. Example: 5'8" = (5×12)+8 = 68 inches × 2.54 = 172.72 cm.
What is 6 feet in cm?
6 feet = 72 inches = 182.88 cm. Each foot is 30.48 cm, so 6 × 30.48 = 182.88 cm exactly.
How big is a 55-inch TV in cm?
A 55-inch TV has a diagonal measurement of 139.7 cm (55 × 2.54). For a 16:9 aspect ratio, the screen is approximately 121.7 cm wide and 68.5 cm tall. The overall TV dimensions are slightly larger due to the bezel.
What is the difference between US and UK inches?
There is no difference — the international inch is exactly 25.4 mm in both the US and UK. This was standardized in 1959 when the US, UK, Canada, Australia, New Zealand, and South Africa agreed on the exact conversion: 1 inch = 25.4 mm.
How do I convert inch fractions to cm?
Multiply the fraction in decimal form by 2.54. Common fractions: 1/8" = 0.3175 cm, 1/4" = 0.635 cm, 3/8" = 0.9525 cm, 1/2" = 1.27 cm, 5/8" = 1.5875 cm, 3/4" = 1.905 cm, 7/8" = 2.2225 cm.