DailyGeneral
Tip Calculator
Quickly calculate tips with our nifty tip calculator. Easily determine gratuity for restaurants, dining, bars, taxis, coffee shops, and more!
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Fuel economy isn't always intuitive. Americans think in miles per gallon, most of the world thinks in liters per 100 kilometers, and the two move in opposite directions -- higher MPG is better, lower L/100km is better. This calculator handles distance, fuel used, fuel economy, and trip cost, and switches between the units without you having to do the math twice.
Five values are in play: distance, fuel used, fuel economy, fuel price, and total cost. Give it any two of the first three and the third drops out. Add a fuel price and you get the cost of the trip on top.
Two competing standards. In the US, fuel economy is miles per gallon, bigger number, better car. A typical sedan sits around 25 to 30 MPG. Almost everywhere else, it's liters per 100 km, where lower is better; a fuel-efficient hatchback uses 6 to 8 L/100km. To convert one into the other, divide 235.215 by whichever number you have. So 30 MPG is roughly 7.84 L/100km, and the trick works in both directions because the units invert each other.
Put your trip distance in miles or kilometers.
Add how much fuel you burned - liters, US gallons, or UK gallons.
Leave fuel economy blank and it fills in. Or run it the other way: enter fuel economy plus one of the other two and read off the third.
Switch on advanced mode if you want cost. It needs a per-unit fuel price and returns the total spend.
Drive 500 km, burn 40 liters: 8.0 L/100km, which is about 29.4 US MPG. At $1.50 a liter, that trip cost $60 in fuel. A 1,200-mile road trip in a 30 MPG car needs 40 gallons; at $3.50 a gallon, budget $140.
Fill-to-fill is more honest than guessing. Top up the tank, drive, top it up again. The second fill is your fuel used.
Short trips lie. Measure across at least 100 km or 60 miles before you trust the result.
Highway and city driving give different numbers, and so do winter and summer. Don't compare across them and expect consistency.
US gallons (3.785 L) and UK gallons (4.546 L) are not the same liquid. A car rated at 30 US MPG would be advertised as roughly 36 UK MPG for the exact same fuel use.
For a gasoline car, anything over 30 MPG (or under 7.8 L/100km) is solid. Hybrids regularly hit 50+ MPG. Trucks and SUVs sit in the 15 to 25 MPG range, which is mostly physics, more mass to move.
Divide 235 by whichever number you have. 30 MPG becomes 7.84 L/100km; 8 L/100km becomes 29.4 MPG. Same trick both ways, because the units are reciprocals.
EPA and WLTP figures come from standardized lab cycles, not your commute. Cold starts, short trips, aggressive throttle, roof racks, underinflated tires, and a heavy right foot all chip away at the rated number. Most drivers see something like 80 to 90 percent of the sticker in mixed driving.
Quickly calculate tips with our nifty tip calculator. Easily determine gratuity for restaurants, dining, bars, taxis, coffee shops, and more!
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MPG Calculator
Free MPG calculator for fuel economy, trip distance, fuel used, and trip cost. Works in MPG, L/100km, km/L — metric and imperial.
https://hexacalculator.com/calculators/daily/general/mpg-calculator
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