Length conversions are useful when comparing measurements from different countries, reading product specifications, planning travel, or working with construction and project dimensions. This guide explains how meters, kilometers, feet, and miles relate to one another, with formulas and examples you can use right away.
Convert length units with ToolAlto
Use the ToolAlto Unit Converter to convert between meters, kilometers, feet, and miles. Enter a value, choose its current unit and the unit you need, then convert. The tool also supports Celsius and Fahrenheit for temperature, which use separate formulas.
Common length conversion formulas
Keep these exact relationships and useful approximations handy:
| Conversion | Formula | Example |
|---|---|---|
| Kilometers to meters | km × 1,000 | 2 km = 2,000 m |
| Meters to feet | m × 3.28084 | 5 m ≈ 16.4042 ft |
| Feet to meters | ft × 0.3048 | 10 ft = 3.048 m |
| Kilometers to miles | km × 0.621371 | 10 km ≈ 6.21371 mi |
| Miles to kilometers | mi × 1.609344 | 5 mi = 8.04672 km |
| Miles to feet | mi × 5,280 | 1 mi = 5,280 ft |
Some formulas above use rounded factors for convenient manual calculations. A calculator or converter may show slightly different final digits depending on its precision and display rounding.
How to convert meters to feet
Multiply meters by 3.280839895 to get feet. For example, 5 meters × 3.280839895 is approximately 16.4042 feet.
For a quick result, enter 5 in the Unit Converter, select meters as the starting unit, and select feet as the destination unit.
How to convert feet to meters
Multiply feet by 0.3048 to get meters. For example, 10 feet × 0.3048 = 3.048 meters. This is useful when a measurement in feet needs to be expressed in metric units.
How to convert kilometers to miles
Multiply kilometers by approximately 0.621371. For example, 10 kilometers is about 6.21371 miles. The conversion factor is rounded here, so use a unit converter when you need more displayed precision.
How to convert miles to kilometers
Multiply miles by 1.609344. For example, 5 miles × 1.609344 = 8.04672 kilometers. This is common when converting road or travel distances into metric units.
When should you use each unit?
- Meters: everyday lengths, room dimensions, and relatively short distances in the metric system.
- Kilometers: longer distances, such as routes and journeys in countries that use metric measurements.
- Feet: building measurements, height, and other customary measurements where feet are standard.
- Miles: road and travel distances in places where miles are commonly used.
When comparing two measurements, convert them to the same unit first. This avoids confusing differences caused only by the way the measurements are expressed.
Why can the answer show different decimal places?
Conversions often produce decimal values even when the original number is a whole number. A converter may round the displayed result to a set number of decimal places for readability. Rounding affects the displayed value, not the underlying unit relationship. For estimates, a few decimal places are usually enough; for technical work, follow the precision required by your specifications.
What about temperature conversions?
The Unit Converter also supports Celsius and Fahrenheit, but temperature uses different formulas. To convert Celsius to Fahrenheit, use °F = (°C × 9/5) + 32. To convert Fahrenheit to Celsius, use °C = (°F − 32) × 5/9. Select temperature units only when converting a temperature; do not mix them with length units.
Step-by-step: use an online unit converter
- Open the Unit Converter.
- Enter the number you want to convert.
- Select the unit the original number uses.
- Choose the destination unit.
- Run the conversion and check the result and displayed precision.
FAQ
How many meters are in a kilometer?
One kilometer is exactly 1,000 meters.
How many feet are in a mile?
One international mile is exactly 5,280 feet.
Can I convert kilometers directly to feet?
Yes. You can convert between kilometers and feet using the Unit Converter, or convert kilometers to meters first and then meters to feet.
Is a meter exactly 3.28084 feet?
One meter is approximately 3.280839895 feet. The commonly used value 3.28084 is rounded, so the final digits may differ in high-precision calculations.
Is the ToolAlto Unit Converter free?
Yes. The Unit Converter is free to use online and does not require an account.