Length converter for metric and US customary units
Enter a length, choose its current unit and select the target unit. HitEquals converts through meters, reports the factor used and keeps additional precision available for copying or export.
Inputs used by this calculator
Length Converter uses the fields below. The starting values reproduce the page example; replace them with values from the same units and time period before using the result.
| Input | Starting example | Accepted value | How it is used |
|---|---|---|---|
| Value | 1 | Any finite number supported by the formula | Supplies the value quantity used by the published equation or result breakdown. |
| From | Metres | Millimetres · Centimetres · Metres · 5 more choices | Selects the unit or conversion path used by Length Converter. |
| To | Feet | Millimetres · Centimetres · Metres · 5 more choices | Selects the unit or conversion path used by Length Converter. |
How the length converter works
The engine first expresses the entered length in meters and then divides by the target unit's meter factor. This single-base method prevents inconsistent pair-by-pair factors.
Exact conversion formulas
The international inch equals exactly 0.0254 meter. Twelve inches make a foot, three feet make a yard and 5,280 feet make an international mile.
1 in=0.0254 m exactly1 ft=0.3048 m exactly1 yd=0.9144 m exactly1 mi=1,609.344 m exactlyWorked meter-to-feet example
Divide 1 meter by 0.3048 meter per foot. The result is approximately 3.280839895 feet, ordinarily displayed as 3.28084 feet.
Metric prefix relationships
Metric length units scale by powers of ten. One kilometer is 1,000 meters, one centimeter is 0.01 meter and one millimeter is 0.001 meter.
Rounding and measurement precision
Exact unit definitions do not make an original measurement more precise. A board measured to the nearest eighth inch should not be reported with many meaningful decimal millimeters simply because the converter can display them.
Length, area and volume conversions
This page converts one-dimensional length. Area factors must be squared and volume factors cubed, so converting square feet or cubic inches with a plain length factor would be incorrect.
Common length conversion factors
| Unit | Meters | Useful relationship |
|---|---|---|
| Millimeter | 0.001 | 1,000 mm=1 m |
| Centimeter | 0.01 | 100 cm=1 m |
| Inch | 0.0254 exact | 12 in=1 ft |
| Foot | 0.3048 exact | 3 ft=1 yd |
| Yard | 0.9144 exact | 1,760 yd=1 mi |
| International mile | 1,609.344 exact | 5,280 ft=1 mi |
| Kilometer | 1,000 | 1 km=0.621371… mi |
Frequently asked questions
How many feet are in a meter?
One meter is approximately 3.28084 feet.
How many centimeters are in an inch?
Exactly 2.54 centimeters.
How many feet are in a mile?
There are exactly 5,280 feet in an international mile.
Does converting add precision?
No. Report only the precision supported by the original measurement.
Can I use this for square feet?
No. Area conversions require squared factors.
What is the difference between metric and US customary length?
Metric units scale by powers of ten; US customary units use defined inch, foot, yard and mile relationships.
What to keep in mind
The displayed result is rounded to at most eight decimal places.
Results are rounded for display in US format, with money in dollars and cents; CSV exports keep full calculation precision. This is a calculation summary, not an official certificate.