Length Converter

Ever tried to picture a 55-inch TV in centimeters, translate your height into feet for a form, or work out how many miles a 10K run really is? This length converter answers all of that as you type, covering millimeters, centimeters, meters, kilometers, inches, feet, yards and miles in one place.

The math uses exact international definitions rather than rounded rules of thumb: one inch is exactly 2.54 cm, one foot exactly 0.3048 m, one yard exactly 0.9144 m and one mile exactly 1,609.344 m. Results are rounded only for display, to a sensible number of significant digits, so you never see floating-point noise like 0.30000000000000004.

Everything runs locally in your browser — there is no server call, no account and nothing to install, and the page keeps working offline once loaded. Both fields are live: type in either one and the other updates immediately, press the swap button to reverse the direction, and check the table of common values under the result for quick reference points.

It is a practical companion for shopping on foreign sites, reading US or UK building plans, comparing race distances, checking luggage dimensions against airline limits and doing school physics homework — anywhere metric and imperial lengths collide.