Free Online Calculators
Trip cost & cost per km
This calculator tells you exactly how much fuel your trip will cost and breaks it down to a cost per kilometre. It uses a straightforward formula: distance ÷ 100 × consumption × fuel price. Perfect for budgeting road trips or comparing routes.
For 500 km at 7 litres per 100 km you need 35.0 litres. Multiply by the fuel price for the cost of the trip.
| Distance \ Per 100 km | 4 l | 5 l | 6 l | 7 l | 8 l | 9 l | 10 l | 12 l |
|---|---|---|---|---|---|---|---|---|
| 50 km | 2.0 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 6.0 |
| 100 km | 4.0 | 5.0 | 6.0 | 7.0 | 8.0 | 9.0 | 10.0 | 12.0 |
| 200 km | 8.0 | 10.0 | 12.0 | 14.0 | 16.0 | 18.0 | 20.0 | 24.0 |
| 300 km | 12.0 | 15.0 | 18.0 | 21.0 | 24.0 | 27.0 | 30.0 | 36.0 |
| 500 km | 20.0 | 25.0 | 30.0 | 35.0 | 40.0 | 45.0 | 50.0 | 60.0 |
| 750 km | 30.0 | 37.5 | 45.0 | 52.5 | 60.0 | 67.5 | 75.0 | 90.0 |
| 1000 km | 40.0 | 50.0 | 60.0 | 70.0 | 80.0 | 90.0 | 100.0 | 120.0 |
| 1500 km | 60.0 | 75.0 | 90.0 | 105.0 | 120.0 | 135.0 | 150.0 | 180.0 |
Divide the trip distance by your vehicle's fuel economy to get the fuel you'll use, then multiply that amount by the price per gallon or litre. For a round trip, double the distance before you start.
Google Maps shows fuel-efficiency and eco-friendly route information, but it does not give you a full trip fuel bill in currency. For that you need the distance from Maps plus your own fuel economy and local fuel price.
Fuel cost equals distance divided by fuel economy, multiplied by the fuel price. If your economy is given in litres per 100 km, multiply distance by consumption, divide by one hundred, then multiply by the price per litre.
Divide the price per gallon by your vehicle's miles per gallon. The result is what each mile costs you in fuel, which you can multiply by any trip distance.
Take the fuel price per gallon and divide it by your average MPG for cost per mile. Using your real-world MPG from a few tank fills gives a more accurate figure than the manufacturer's rating.
Gas prices change daily and vary by state and station, so check a live source such as AAA's national average or GasBuddy before budgeting a trip. Enter that current price in the calculator to get an up-to-date result.
The cheapest state changes from week to week, with Gulf Coast and southern states usually at the low end and West Coast states at the high end. AAA's state-by-state gas price page shows the current ranking.
The national average is published daily by AAA and updated every morning, so look it up there rather than relying on a fixed figure. Prices at individual stations can sit well above or below that average.
Tucson prices are tracked daily by AAA's metro-area report and by station-level apps like GasBuddy. Arizona prices typically differ from the national average, so use a local quote for trip planning.
Whether you're planning a road trip, commuting daily, or just trying to keep your monthly driving budget in check, knowing exactly how much fuel will cost you is essential. Our free Fuel Cost Calculator helps you estimate your total trip fuel cost and calculate the cost per kilometer (or mile) in seconds. No guesswork, no spreadsheets – just fast, accurate results.
Using the calculator is straightforward. Simply enter a few key details and you'll get an instant breakdown of your fuel expenses:
Once you fill in these fields, the calculator instantly shows you the total fuel cost for the trip and the cost per kilometer or mile. It's that simple.
Fuel is one of the biggest variable expenses for any driver. Prices fluctuate constantly, and your vehicle's efficiency can vary depending on road conditions, speed, and load. Here's why calculating ahead makes a real difference:
The cost per kilometer is one of the most useful metrics for any driver. It tells you exactly how much each kilometer of driving is costing you in fuel alone. This figure is particularly useful when:
To calculate cost per km manually, divide the total fuel cost by the trip distance. Our calculator does this automatically, saving you time and reducing the chance of errors.
Once you know your baseline fuel cost, you can start looking for ways to bring it down. Here are some practical, proven strategies:
The way you use this calculator might differ depending on your driving context. For a road trip, you'll want to input the total one-way or round-trip distance and get a full picture of your journey's fuel budget. For a daily commute, enter your daily distance and multiply the cost by your working days to see your monthly fuel expense.
Business drivers and freelancers can also use this tool to generate accurate fuel expense reports, ensuring they claim the correct amount for tax or reimbursement purposes.
The calculator gives you a highly accurate estimate based on the figures you enter. Real-world results may vary slightly due to factors like driving style, road conditions, traffic, air conditioning use, and vehicle load. For the most accurate result, use your vehicle's actual fuel consumption from recent fill-ups rather than the manufacturer's quoted figure.
Yes. The calculator works for any fuel type. Simply enter the price per liter (or gallon) of whatever fuel your vehicle uses – petrol, diesel, LPG, or even the equivalent cost for electric vehicles based on kWh consumption.
This varies by vehicle type. A fuel-efficient small car might consume around 5–6 liters per 100 km, while a large SUV or truck might use 10–15 liters per 100 km. Hybrid vehicles often achieve 3–5 liters per 100 km in mixed driving. Knowing your vehicle's actual rate is key to accurate calculations.
The most accurate way is to fill your tank completely, reset your trip odometer, drive normally, then fill up again. Divide the liters used by the kilometers driven and multiply by 100 to get liters per 100 km. You can also find the manufacturer's rated efficiency in your vehicle handbook or on the manufacturer's website.
Absolutely. Once you have the total fuel cost for the trip, simply divide it by the number of people sharing the journey. This makes it easy and fair for everyone in a carpool or group road trip to contribute their equal share.