Learn how to convert 30 centimeters to inches and see some fast facts and examples of common objects that are 30 cm long. Use the calculator to convert any centimeter figure to inches. How many Inches is 30 cm? How do you convert 30 cm to Inches? The conversion ratio for Centimeters to Inches is 1 Centimeter = 0.393701 Inches. To convert 30 Centimeters to Inches, we can use this formula to calculate: 30 Centimeters = 30 × 0.393701 Inches = 11.811024 Inches How many inches is 30 cm? Convert 30 centimeters to inches. Here you can easily find the answer and the conversion procedure to convert 30 cm to inches. 30 Centimeters is equal to 11.81 Inches. Centimeters to Inches Conversion Formula: in = cm ÷ 2.54. According to 'cm to inches' conversion formula if you want to convert 30 (thirty) Centimeters to Inches you have to divide 30 by 2.54. Here is the complete solution: