What is 30 millimeters to inches? The answer is that 30 mm equals 1.1811 inches.
How to convert 30 mm to inches? We know that one inch is equal to 25.4 millimeters, so to convert 30 millimeters to inches, we must divide the amount of centimeters by 25.4, which means that 30 millimeters is equal to 30 mm ÷ 25.4 = 1.1811 inches.
See also: How to convert 30 inches to mm.