Everyday Calculators
Unit Converter
Updated Aug 24, 2026 Reviewed Aug 24, 2026
Convert length, area, volume, mass, temperature, and speed with explicit units and adjustable display precision.
Measurement conversion
Choose compatible source and target units
Result
Calculation summary
Enter values to see the result
Your result, breakdown, assumptions, and warnings will appear here.
Conversion preview
Source value to target value
Formula
target = targetFromBase(sourceToBase(value))
- 1 m equals
- 3.28084 ft
- 1 ft equals
- 0.3048 m
- Display precision
- 6 decimal places
How to use this calculator
- 1Choose a measurement type such as length, volume, or temperature.
- 2Enter the value and select its source and target units.
- 3Choose the displayed decimal precision and calculate the converted value.
Formula
Target value = targetFromBase(sourceToBase(input value))
The input is normalized to one base unit for its measurement type, then converted into the selected target unit.
Calculation steps
- Validate that both units belong to the selected measurement type.
- Normalize the entered value to the category base unit.
- Convert the normalized quantity to the target unit.
- Round only the displayed value to the selected number of decimal places.
Worked example
One meter converts to approximately 3.28084 feet because one international foot is exactly 0.3048 meter.
Assumptions
- U.S. liquid measures and Imperial gallons are labeled separately and are never treated as interchangeable.
- Mass units describe mass; everyday labels may commonly call them weight.
- Temperature conversions include their required offsets rather than using multiplication alone.
- Display precision does not change the full-precision calculation.
Sources
Frequently asked questions
Are U.S. and Imperial gallons the same?
No. A U.S. liquid gallon is 3.785411784 liters, while an Imperial gallon is 4.54609 liters.
Why does temperature conversion need an offset?
Celsius, Fahrenheit, and kelvin have different zero points, so temperature conversion is not a simple scale factor.
Does changing precision change the calculation?
No. It changes presentation only; conversion is performed before display rounding.
Can I convert between unrelated measurement types?
No. A length cannot be converted to an area, mass, or another unrelated quantity.