Length Converter
Convert between 16 units of length, from femtometers to parsecs. Enter a value, pick the source and target unit, and the result updates as you type.
3.28083989501
1 Meter = 3.28083989501 ft
About this tool
The metric system defines the meter as the base unit and scales it by powers of ten, which is why converting between millimeters, centimeters and kilometers only moves the decimal point. Imperial units use historical ratios instead: 12 inches to a foot, 3 feet to a yard, 1,760 yards to a mile.
The two systems meet at an exact definition: one inch is precisely 25.4 millimeters, agreed internationally in 1959. Every metric-to-imperial length conversion, including the ones here, follows from that constant.
Frequently asked questions
- How many centimeters are in an inch?
- Exactly 2.54 cm. The inch has been defined as precisely 25.4 millimeters since the 1959 international yard and pound agreement.
- How do I convert meters to feet?
- Multiply by 3.28084. One meter equals about 3 feet 3.4 inches.
- How long is a mile in kilometers?
- One statute mile is 1.609344 kilometers. A nautical mile is longer at exactly 1.852 kilometers.
- What is a light year?
- The distance light travels in a vacuum in one Julian year — about 9.46 trillion kilometers. It measures distance, not time.
- Why do some results show many decimal places?
- Conversions between very different scales, such as parsecs to millimeters, produce extremely large or small numbers. The value is rounded for display but computed at full precision.
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