Fuel & Energy Calculators for Drivers and Homeowners
Whether you are planning a road trip, budgeting your daily commute, deciding between an electric and petrol vehicle, or preparing for a power outage, understanding your fuel costs is essential. These calculators turn complex fuel consumption maths into instant answers — no spreadsheet required.
All tools support both imperial (miles, MPG, gallons) and metric (km, L/100km, litres) measurement systems, making them useful for drivers in Australia, the US, UK, Canada, New Zealand, and anywhere else in the world.
Which Calculator Should I Use?
- Going on a road trip? Use the Trip Fuel Cost Calculator to estimate total gas cost before you leave.
- Wondering what your commute really costs? The Commute Fuel Cost Calculator shows your annual spend on getting to work.
- Considering an EV purchase? The EV vs Gas Calculator compares 5-year and 10-year total cost of ownership side by side.
- Planning for power outages? The Generator Fuel Calculator tells you how long your generator will run and how much fuel to stockpile.
- Trying to reduce your fuel bills without buying a new car? The Fuel Economy Savings Calculator quantifies the dollar impact of simple driving improvements.
Understanding Fuel Efficiency Units
The two most common fuel efficiency measurement systems are MPG (miles per gallon) used in the US and UK, and L/100km (litres per 100 kilometres) used in Australia, Canada, and Europe. These units measure the same thing differently: MPG tells you how far you travel on one unit of fuel, while L/100km tells you how much fuel you consume over a fixed distance.
To convert: MPG to L/100km = 235.21 ÷ MPG. L/100km to MPG = 235.21 ÷ L/100km. All calculators on this page accept both formats directly — simply select your preferred unit using the toggle on each tool.