Length converters
Centimeters, inches, feet, miles, and more.
12 detailed converter pages · 9 units in the hub tool
Quick convert any length unit
Pick any two units in this category. Math runs in your browser — nothing is uploaded.
Result
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About length conversions
Length conversions appear everywhere: screen sizes quoted in inches while your tape measure reads centimeters, road signs in miles versus kilometers on a rental car dashboard, furniture and doorway dimensions in feet, and sewing or 3D-printing measurements down to the millimeter. Metric (SI) length units are the everyday standard in most of the world, while the United States — and, for some measures, the United Kingdom — still relies on feet and inches for construction, real estate, and casual conversation.
The two systems are not just different numbers for the same idea; they scale differently, too. Metric length moves in clean powers of ten (10 mm = 1 cm, 100 cm = 1 m, 1,000 m = 1 km), which is why engineering drawings and lab measurements default to metric worldwide. Imperial length uses irregular multiples — 12 inches to a foot, 3 feet to a yard, 5,280 feet to a mile — inherited from historical body-based measurements, which is exactly why a quick mental conversion is so easy to get wrong by a factor of ten or more.
Our length converters use exact, internationally defined factors rather than rounded approximations — for example 1 inch = 2.54 centimeters by formal international agreement, and 1 mile = 1.609344 kilometers derived from that same definition. Each converter page includes the formula, a reference table for common values, and an FAQ addressing the specific pair, so you can double-check homework, shipping label dimensions, fabric yardage, or a DIY cut list with confidence rather than guesswork.
Length also hides a common trap once you move from one dimension to two or three: doubling a length quadruples an area and multiplies a volume by eight. If you are estimating flooring, paint coverage, or shipping volume from a linear measurement, treat length conversion as step one, not the whole calculation — our area and volume converters handle the squared and cubed math correctly so you do not have to do it by hand.
Whether you are checking a European appliance dimension against a US doorway, converting a running pace from kilometers to miles, or verifying a lumber cut in millimeters against an imperial blueprint, start with the specific pair below and read the short explanation on that page — it is written for that exact conversion, not a generic one-size-fits-all calculator.
Related reading: Length units explained: meters, feet, miles, and more
Detailed length converters
Each page below has a dedicated calculator plus pair-specific use cases, tips, tables, and FAQ — not a generic template.
- Centimeter to Foot cm → ft
- Centimeter to Inch cm → in
- Foot to Inch ft → in
- Foot to Meter ft → m
- Inch to Centimeter in → cm
- Inch to Foot in → ft
- Kilometer to Mile km → mi
- Meter to Foot m → ft
- Meter to Yard m → yd
- Mile to Kilometer mi → km
- Millimeter to Inch mm → in
- Yard to Meter yd → m
Frequently asked questions
Which length conversions have dedicated pages? +
We publish detailed pages for the 12 most-used length pairs — each with use cases, tips, conversion tables, and an FAQ. For any other combination of units in this category, use the hub converter above; it supports every unit we define without a separate thin page.
Does the hub converter send my numbers to a server? +
No. Unit math runs entirely in your browser with the same conversion factors used on our dedicated pair pages. Nothing you type is uploaded or logged.
How accurate are length conversions on ConvertHub? +
We use internationally defined factors (for example 1 inch = 2.54 cm exactly) documented on our methodology page. Results are shown with enough precision for everyday and most professional use; always verify critical engineering, medical, or legal figures against the original specification.