Length Unit Converter
Convert length between every common unit at once — metric (mm, cm, m, km) and imperial (inches, feet, yards, miles). Pick the from and to units and read the full table.
Your numbers
Result
| Unit | Value |
|---|---|
| millimeters | 1,000 |
| centimeters | 100 |
| meters | 1 |
| kilometers | 0 |
| inches | 39.37 |
| feet | 3.28 |
| yards | 1.09 |
| miles | 0 |
Metric and imperial
The metric system scales by 10 (1 m = 100 cm = 1,000 mm; 1 km = 1,000 m). The imperial system uses 12 inches per foot, 3 feet per yard and 1,760 yards per mile. The bridge between them: 1 inch = 2.54 cm exactly.
How to use it
Choose a unit to convert from, a unit to convert to, and enter the value. The result shows above, and the table lists the value in every unit at once — handy for a quick cross-check.
Frequently asked questions
Sources
- International System of Units and imperial length units
Embed this calculator
Copy the code and paste it into your site or blog. Credit with a link back to Contania is included, and the height adjusts itself.
<iframe src="https://contania.app/embed/conversions/unit-converter" title="Unit Converter — length (metric and imperial)" width="100%" height="720" loading="lazy" style="border:1px solid #e5e0d8;border-radius:12px;max-width:640px"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="contania:embed-height"){var f=document.querySelector('iframe[src="https://contania.app/embed/conversions/unit-converter"]');if(f){f.style.height=e.data.height+"px"}}});</script>Related calculators
Inches → cm
Convert inches to centimeters instantly. Multiply by 2.54 — the relation is exact. Works both ways, with a quick reference table for common inch sizes.
CalculateConversionsm → ft
Convert meters to feet and back. One meter is about 3.2808 feet. Useful for height, room dimensions, land and any spec sheet in the other system.
CalculateConversionsArea
Convert area between square feet, square meters, square inches, square yards, acres, hectares, square kilometers and square miles.
CalculateConversionsCelsius ↔ Fahrenheit
Convert Celsius to Fahrenheit and back, with Kelvin alongside. Enter a temperature and pick the scales — the formula and all three readings are shown.
CalculateConversionscm → Inches
Convert centimeters to inches instantly. Divide by 2.54 — the relation is exact. Works both ways, with a reference table for the sizes you meet most often.
CalculateConversionsCurrency Converter
Convert between the US dollar, euro, pound, yen and other major currencies. Use the reference rates for a quick estimate, or enter today rate for an exact figure.
Calculate