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Unit Converter

Ten kinds of units, exact factors, results as you type.

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  • Exact NIST Factors

Unit converter

Convert length, weight, temperature, volume and six more unit types

1 meter = 3.280839895 feet

Formula: ft = m ÷ 0.3048

Meters to feet table

Meters (m)Feet (ft)
13.280839895
26.56167979
39.842519685
413.12335958
516.40419948
619.68503937
722.96587927
826.24671916
929.52755906
1032.80839895
1549.21259843
2065.6167979
2582.02099738
50164.0419948
100328.0839895

Calculated on your device with exact factors from NIST and the SI.

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How to convert units

Three steps, all in your browser.

  1. 1

    Type a number

    Enter a value in either box; the other updates instantly.

  2. 2

    Pick the units

    Switch units or swap them around.

  3. 3

    Copy the result

    Copy the answer or read it off the conversion table.

Unit Converter: what to know

This unit converter covers ten common kinds of measurement: length, weight, temperature, volume, area, speed, time, data storage, pressure and energy. Pick a category, choose the two units and type a number. The result updates as you type, along with the formula behind it and a table of common values, so you can check the math rather than take it on trust.

Every factor is the exact legal definition, not a rounded approximation. The inch is 2.54 cm and the pound 0.45359237 kg under the 1959 international yard and pound agreement, the US gallon is 231 cubic inches (3.785411784 L) per NIST Handbook 44, the UK gallon is 4.54609 L, the standard atmosphere is 101,325 Pa and the electronvolt is 1.602176634 × 10⁻¹⁹ J under the 2019 SI. Temperatures use the exact formulas: K = °C + 273.15 and °F = °C × 9/5 + 32. Results are calculated to 15 significant digits, so 1 inch shows as 2.54 cm, never 2.5400000000000005.

A few units have more than one meaning, and the converter labels them. Cups, pints, quarts and gallons are US customary unless marked UK. A calorie (cal) is the thermochemical calorie of 4.184 J, while kcal is the food Calorie. In data storage, kB, MB and GB are decimal (1000-based) and KiB, MiB and GiB are binary (1024-based), as defined by IEC 80000-13.

Popular uses

  • Following a recipe written in cups, ounces or grams
  • Reading a weather forecast or oven setting in °F or °C
  • Checking a product's size or weight in your own units
  • Comparing drive sizes, file sizes and data plans
  • Homework and lab work that needs exact conversion factors

Tips for the best result

  • Paste numbers with thousands separators like 1,250.5 or 1 250; they are read correctly.
  • To convert the other way, swap the from and to units.
  • For area and volume, convert the area or volume units directly instead of squaring a length factor by hand.
  • Results show up to 10 significant digits, and the formula shows the exact factor used.

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Frequently asked questions