Quick formula: km per litre = distance in km ÷ fuel in litres. A higher number means better fuel efficiency.
What is km per litre (km/L)?
Kilometres per litre is a fuel economy metric that tells you how far your vehicle travels using one litre of fuel. It is one of the easiest ways to compare efficiency between trips, driving habits, and even different cars.
If your result is 15 km/L, that means your car can travel 15 kilometres for every litre consumed under those conditions. In general, the higher your km/L, the lower your fuel expense per kilometre.
How this km per litre calculator works
Step 1: Enter distance
Add the total kilometres driven since your last fill-up or over a specific journey. For best accuracy, use the odometer or trip meter.
Step 2: Enter fuel used
Enter the litres needed to refill your tank. This is usually the most reliable way to estimate actual usage.
Step 3: Calculate
Click Calculate to see:
- Fuel efficiency in km/L
- Equivalent L/100 km
- Optional cost per kilometre if fuel cost is provided
Example calculation
Suppose you drove 420 km and used 28 litres:
- km/L = 420 ÷ 28 = 15.00 km/L
- L/100 km = (28 ÷ 420) × 100 = 6.67 L/100 km
That is generally considered solid efficiency for a petrol sedan under mixed city/highway driving.
What is a good km per litre?
It depends on vehicle type, road conditions, speed, and traffic. As a rough guide:
- Small hatchback: 16–24 km/L
- Sedan: 12–18 km/L
- SUV: 8–14 km/L
- Pickup/large vehicle: 6–12 km/L
Tips to improve your fuel economy
- Keep tire pressure at recommended levels.
- Avoid aggressive acceleration and hard braking.
- Maintain a steady speed on highways.
- Reduce unnecessary idling time.
- Remove excess weight from your vehicle.
- Service engine oil, filters, and spark plugs on schedule.
Common mistakes when measuring fuel usage
Using partial refill data
Try to use full-tank to full-tank measurements for better accuracy.
Mixing units
Make sure distance is in kilometres and fuel is in litres.
One-trip conclusions
Single trips can vary widely. Track multiple fill-ups and use an average to understand your real-world fuel performance.
Frequently asked questions
Is higher km/L always better?
Yes. Higher km/L means your vehicle travels farther using the same fuel amount.
Why also show L/100 km?
Many countries and manufacturers use L/100 km. It is simply the inverse-style metric of km/L and is useful for comparison.
Can I use this for bikes and trucks?
Absolutely. The formula is universal for any vehicle, as long as you enter correct distance and fuel values.
Final thoughts
Tracking km per litre is one of the fastest ways to understand your true driving cost. Use this calculator after each refill, keep a running log, and you'll quickly see patterns that help you save money over time.