One inch equals how many centimeters?

One inch equals how many centimeters?

• A. 2.54 cm
• B. 1.54 cm
• C. 3.54 cm
• D. 0.54 cm

Answer: (A)

Converting inches to centimeters uses a fixed ratio: 1 inch is exactly 2.54 centimeters. This exact value comes from the international definition that ties the imperial unit (inch) to the metric unit (centimeter). So one inch equals 2.54 cm, which is why that option is the correct choice. The other numbers don’t match the defined conversion: they’re either too small or too large for a single inch. If you double-check, 1 cm is about 0.3937 inches, so 2.54 cm corresponds precisely to 1 inch.

Converting inches to centimeters uses a fixed ratio: 1 inch is exactly 2.54 centimeters. This exact value comes from the international definition that ties the imperial unit (inch) to the metric unit (centimeter). So one inch equals 2.54 cm, which is why that option is the correct choice. The other numbers don’t match the defined conversion: they’re either too small or too large for a single inch. If you double-check, 1 cm is about 0.3937 inches, so 2.54 cm corresponds precisely to 1 inch.