CO2 Per km Table: CO₂ per km by Fuel efficiency
Reference table of co₂ per km for CO2 Per km across a range of fuel efficiency values — exact, engine-computed figures you can read off at a glance.
CO2 Per km Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
CO₂ per km
154.0
- In kg per km
- 0.1540
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the CO2 Per km Calculator
The CO2 Per km Calculator works out your co₂ per km, along with 1 related figure in an instant. Enter fuel efficiency and co₂ per litre of fuel and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the fuel efficiency.
- Enter the co₂ per litre of fuel.
- Read off your co₂ per km, together with in kg per km — the calculator updates automatically, with no button to press.
Formula
The CO2 Per km Calculator uses the formula:
CO₂ per km = CO₂ per litre of fuel ÷ Fuel efficiency × 1000
Worked example
For example, with fuel efficiency of 15 km/l and co₂ per litre of fuel of 2.31 kg/l, the co₂ per km is 154.0.
| Fuel efficiency | 15 km/l |
|---|---|
| CO₂ per litre of fuel | 2.31 kg/l |
| CO₂ per km | 154.0 |
|---|---|
| In kg per km | 0.1540 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Divide CO₂ per litre by fuel efficiency. At 15 km/l with petrol at 2.31 kg/l, emissions are about 154 g per km.
Burning a litre of petrol releases about 2.31 kg of CO₂; diesel is around 2.68 kg per litre.
Better fuel economy means less fuel burned per kilometre, so fewer emissions for the same distance.
Drive efficiently, maintain the car, reduce weight, and consider hybrid or electric options.
The CO2 Per km Calculator uses the formula: CO₂ per km = CO₂ per litre of fuel ÷ Fuel efficiency × 1000. For example, with fuel efficiency of 15 km/l and co₂ per litre of fuel of 2.31 kg/l, the co₂ per km is 154.0.
Enter the fuel efficiency. Enter the co₂ per litre of fuel. Read off your co₂ per km, together with in kg per km — the calculator updates automatically, with no button to press.
Related guides
How to Calculate CO2 Per km: Formula, Steps & Examples
Learn how to calculate CO2 Per km — the formula explained step by step, with worked examples and a free calculator to check your answer.