Conversion factor tools relevant for vehicle use.

**TIP**: enter an amount in the results box to get the *reverse* conversion.

Conversion Tools

**Fuel / Oils**- US Gallon to Litre
- Imperial (UK) Gallon to Litre
**Distance**- Miles to Kilometres
**Speed**- Miles per hour (mph) to Kilometre per hour (km/h)
**Fuel Economy**- Miles per (US) Gallon to Kilometre per Litre
- Mile per imperial (UK) Gallon to Kilometre per Litre
**Tools**- Torque Wrench - N.m to lbf.ft
**Temperature**- Celsius to Fahrenheit
**Power**- Engine Power - Horsepower (hp) to Kilowatt (kW)
**Sizes**- Engine Size - Litre to Cubic Centimetres (cc)

**US Gallon to Litre**

**Formula** Approximate result - multiply Gallon by 3.785. Full multiplication: 3.785411784

**Imperial (UK) Gallon to Litre**

**Formula** Approximate result - multiply Gallon by 4.546. Full multiplication: 4.54609

**Miles to Kilometres**

**Formula** Approximate result - multiply Mile by 1.609. Full multiplication: 1.609344

**Miles per hour (mph) to Kilometre per hour (km/h)**

**Formula** Approximate result - multiply Mph by 1.609. Full multiplication: 1.609344

**Miles per US Gallon to Kilometre per Litre**

**Formula** Approximate result - divide Gallon by 2.352. Full division: 2.352145

**Mile per imperial (UK) Gallon to Kilometre per Litre**

**Formula** Approximate result - divide Gallon by 2.824. Full division: 2.82481

**Torque Wrench - N.m to lbf.ft**

**Formula** Approximate result - divide N.m by 1.356. Full division: 1.35582

**Celsius to Fahrenheit**

**Formula** (1 °C × 9/5) + 32

**Engine Power - Horsepower (hp) to Kilowatt (kW)**

**Formula** Approximate result - divide Horsepower by 1.341. Full division: 1.341022

**Engine Size - Litre to Cubic Centimetres (cc)**

**Formula** Multiply Litre by 1000

All the vehicle based conversion factors on this page are using industry verified values for the unit calculation, and additionally have been referenced from relevant 'conversion of units' sections on Wikipedia.

Conversion tables are often found within the pages of workshop repair manuals for professional and amateur mechanic use. For instance, when using tools for tightening nuts and bolts to a precision, such as a torque wrench, the torque conversion between [ N.m ] and [ lbf.ft] would be a useful converter in this respect. The formula used in the calculations are also shown for each conversion factor unit.