Remember: 1 cm = 0.4 inches So, for quick mental math, multiplying centimetres by 0.4 can give a close idea of the measurement in inches. However, for exams or accuracy, use the precise 2.54 ...

Example 1: Convert 10 cm into inches Use the formula: 10 ÷ 2.54 Answer: 3.94 inches So, 10 cm = 3.94 inches ...