The need for this conversion arises most often in three specific areas:
Since 1 cm is approximately , you can simply multiply the centimeter value by 0.4 . Example: You see a 20 cm vase. Mental Math: Actual Result: 20 cm is actually 7.87 inches . centimeters to inches
Remember that centimeters are smaller than inches. Your result in inches should always be a smaller number than your starting number in centimeters. The need for this conversion arises most often
If you are at a store and need a "close enough" estimate without a calculator, use the . Remember that centimeters are smaller than inches
For those moments when you don’t want to pull out a calculator, here is a quick look at common conversions: Centimeters (cm) Inches (in) Rounded Fraction ~ 9 27/32" ~ 11 13/16" ~ 19 11/16" 100 cm (1m) How to Convert Mentally: The "Multiply by 0.4" Rule
While TVs and monitors are sold by the "inch" globally, the actual dimensions of the hardware are often listed in centimeters on technical spec sheets. Common Pitfalls to Avoid
To convert centimeters to inches, you need to know the specific relationship between the two units. By international agreement, one inch is exactly defined as 2.54 centimeters. Inches = Centimeters ÷ 2.54