# Fuel litres to kg calculator

> A free converter between litres at 15 °C and kilograms for petrol, diesel and other fuels, using the density at 15 °C.

Canonical: https://dipdensity.watsinfo.com/tools/fuel-weight-calculator/
Last updated: 2026-11-02

**Short answer:** Weight in kg is litres at 15 °C times density at 15 °C, divided by 1,000. 1,000 litres of diesel of 832 kg/m³ weighs 832 kg. Turn it round to get litres from kilograms.

The calculator runs in the browser at https://dipdensity.watsinfo.com/tools/fuel-weight-calculator/.

## Why litres at 15 °C

Weight does not change with temperature, but volume does. Density at 15 °C goes with litres at 15 °C. If your litres were measured warm, correct them first with the [volume correction factor calculator](https://dipdensity.watsinfo.com/tools/volume-correction-factor-calculator/).

## Questions

### How much does one litre of petrol weigh?

Between 0.720 and 0.775 kg at 15 °C, since BS-VI petrol must be 720 to 775 kg/m³. A typical figure is about 0.745 kg.

### How much does one litre of diesel weigh?

Between 0.810 and 0.845 kg at 15 °C for BS-VI diesel. A typical figure is about 0.830 kg.