Millimeters
mm
Metric · Imperial Length
Length Converter
Edit any unit below. Every other length value updates automatically.
Enter a value in any field
Supported units: mm · cm · m · in · ft · yd
Common values
Centimeters
cm
Meters
m
Inches
in
Feet
ft
Yards
yd
Conversions, edits, and copies use the currently displayed value.
Lower display precision may introduce small rounding differences after repeated conversions.
How to Use the Length Converter
Edit any length field below and every other supported unit updates automatically.
- Type a number in millimeters, centimeters, meters, inches, feet, or yards.
- All other length units refresh to match the value you entered.
- Use Display precision or Common values chips when you need a quick starting point.
Common Examples
- 1 inch = 2.54 centimeters
- 10 inches = 25.4 centimeters
- 30 centimeters ≈ 11.81 inches
Frequently Asked Questions
Can I convert inches and centimeters?
Yes. Enter a value in inches and centimeters update automatically, or start from centimeters and read inches in the same grid.
Should I use packaged dimensions for Amazon FBA?
Yes. Use outer carton or mailer dimensions ready for FBA inbound. Bare product sizes omit materials Amazon includes in fulfillment measurement.