MEASUREMENT TOOL
Unit Converter
Convert length, weight, temperature, currency and 15 more categories — instantly, free, no sign-up.
About Length Conversion
Length is a measure of distance. In the International System of Units (SI), the base unit for length is the meter, while imperial and US customary systems primarily use the inch, foot, yard, and mile. This tool converts instantly between all common metric and imperial length units.
Object & Container Dimensions
Common everyday items and their typical size, for quick real-world reference.
Frequently Asked Questions
How accurate is this converter?
This tool uses internationally defined conversion factors (SI and NIST standards) and calculates results to 10 significant digits, so results are suitable for everyday, academic, and professional use.
Can I convert in both directions?
Yes. Use the swap button between the two fields to instantly reverse the conversion direction.
Is this converter free to use?
Yes, this converter is completely free, works on any device, and requires no sign-up or download.
How long is 6 inches, 12 inches, or other common lengths?
Use the Popular Searches row above while on the Length tab — tap any inch or foot value (like 6 in, 12 in, 24 in, 36 in) to see it instantly converted to centimeters and other units, alongside a full reference table.