Unit Converter
Category
Result
3.28084
1 m × 3.280840 = 3.280840 ft
The Unit Converter translates a value from one unit to another across five categories: length, weight, temperature, volume, and speed. Each category routes the conversion through a single base unit, so any pair within a category converts accurately in both directions. It handles everyday needs like kilometres to miles, kilograms to pounds, Celsius to Fahrenheit, litres to gallons, and km/h to mph.
How it works
- Pick a category (Length, Weight, Temperature, Volume, or Speed) to load the units available for it.
- Choose a "from" unit and a "to" unit, then enter the value. The value is first converted to the category base unit, then from the base unit to the target unit.
- Length uses metres as the base, weight uses kilograms, temperature uses Celsius, volume uses litres, and speed uses metres per second; temperature uses additive offsets rather than simple scaling.
Worked examples
Convert 100 kilometres to miles.
- Length base is metres: 100 km × 1000 = 100,000 m.
- Metres to miles: 100,000 ÷ 1609.344 ≈ 62.137 mi.
100 km ≈ 62.14 miles.
Convert 100 °C to Fahrenheit.
- Celsius is the temperature base, so 100 °C stays 100 in the base.
- Apply the Fahrenheit formula: 100 × 9/5 + 32 = 212 °F.
100 °C = 212 °F (the boiling point of water at sea level).
Frequently asked questions
- Which unit categories does this converter support?
- Five: length (m, km, cm, mm, mi, yd, ft, in), weight (kg, g, mg, lb, oz), temperature (°C, °F, K), volume (L, mL, US gallon, quart, cup, fluid ounce), and speed (m/s, km/h, mph, knots).
- Are the volume units US or imperial?
- The volume units use US customary measures — US gallon, quart, cup, and fluid ounce. These differ from UK imperial measures, so do not mix the two when converting recipes or fuel volumes.
- Why is temperature converted differently from other units?
- Length, weight, volume, and speed scale by a multiplication factor, but temperature scales need an offset too. Celsius to Fahrenheit multiplies by 9/5 and adds 32, and Kelvin adds 273.15 to Celsius.
- Can I convert between two different categories?
- No. Conversions only happen within a single category because the dimensions are different — there is no meaningful factor between, say, a metre and a kilogram.