Converters
Unit Converter
Convert everyday units in one place.
Result
Enter your numbers and press Calculate to see the result.
Calculating…
How the unit converter works
Every unit in a category is defined by an exact factor to a base unit — meters for length, kilograms for weight, square meters for area, liters for volume. Your value is first converted to the base unit, then to the target unit, so any pair of units stays consistent:
result = value × factor(from) ÷ factor(to)
Temperature is the exception: its scales have different zero points, so the converter uses offset formulas (for example °F = °C × 9/5 + 32) instead of plain factors.
Worked examples
- 10 meters to feet — 10 × 1 ÷ 0.3048 = 32.81 ft.
- 5 pounds to kilograms — 5 × 0.45359237 = 2.27 kg.
- 2 acres to square meters — 2 × 4,046.86 = 8,093.71 m².
- 3 US gallons to liters — 3 × 3.785411784 = 11.36 L.
Why convert through a base unit
Storing a direct factor for every possible pair of units would mean hundreds of numbers to maintain and keep accurate. Instead, each unit stores a single exact factor to one base — meters, kilograms, square meters, or liters — and any conversion becomes two steps: into the base, then out to the target. This keeps every result internally consistent, so converting metres → feet → inches and back always returns the original value.
US vs. imperial gallons
Watch out for units that share a name but not a size. A US gallon is about 3.785 litres, while a UK (imperial) gallon is about 4.546 litres — roughly 20% larger — which also affects pints and fluid ounces. Fuel economy, recipes, and container sizes can all differ depending on which system a figure came from, so pick the specific unit rather than assuming "gallon" means the same everywhere.
Need just one category with more units on screen? Try the dedicated length converter, weight converter, or temperature converter.
Unit Converter — frequently asked questions
How does the unit converter work?
Each unit has an exact factor to a base unit (meters, kilograms, square meters, or liters). Your value is converted to the base unit and then to the target unit, so results stay exact across any pair.
Which categories are supported?
Length (meters to miles), weight (milligrams to metric tons), area (square centimeters to hectares and acres), volume (milliliters to cubic meters and US gallons), and temperature (Celsius, Fahrenheit, Kelvin, Rankine).
Can I control how many decimals are shown?
Yes. The precision field sets the number of decimal places in the result, from whole numbers up to fine precision for scientific use.
Why is temperature converted differently?
Temperature scales have different zero points, not just different step sizes, so conversion needs offset formulas — for example °F = °C × 9/5 + 32 — instead of a simple multiplication factor.