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How much is 50 gallons of gas?
What does 50 gallons of gas cost? It depends only on the price per gallon — here's the math at a range of prices, plus a calculator for your exact trip.
Short answer
50 gallons of gas costs about $175.00 at $3.50 per gallon (50 gallons × $3.50). At $3.00 a gallon it's $150.00, and at $4.00 it's $200.00. Multiply the gallons by your local price per gallon to get the exact figure.
Total gas cost
$40.38
- Fuel used
- 11.54 gallons
- Cost per mile
- $0.13
About the how much is 50 gallons of gas?
The cost of a fixed number of gallons is simple: gallons × price per gallon. 50 gallons is a common tank or fill-up size, so this page shows it across today's price range. If you want the cost of a whole trip instead, enter your distance and MPG in the calculator above.
Cost of 50 gallons of gas by price
| Price per gallon | Cost of 50 gallons |
|---|---|
| $3.00 | $150.00 |
| $3.50 | $175.00 |
| $4.00 | $200.00 |
| $4.50 | $225.00 |
| $5.00 | $250.00 |
Cost = gallons × price per gallon. Prices vary by state, grade, and station.
Gas cost per mile by MPG and gas price
| MPG | $3.00/gal | $3.50/gal | $4.00/gal | $4.50/gal |
|---|---|---|---|---|
| 15 MPG | $0.20 | $0.23 | $0.27 | $0.30 |
| 20 MPG | $0.15 | $0.18 | $0.20 | $0.23 |
| 25 MPG | $0.12 | $0.14 | $0.16 | $0.18 |
| 30 MPG | $0.10 | $0.12 | $0.13 | $0.15 |
| 35 MPG | $0.09 | $0.10 | $0.11 | $0.13 |
| 40 MPG | $0.08 | $0.09 | $0.10 | $0.11 |
Cost per mile = price per gallon ÷ MPG. A more efficient car cuts fuel cost proportionally at every gas price. Example rows use the U.S.-average ~$3.50/gal as the middle column.
How we calculate this
This calculator uses the standard fuel-cost formula, in US or metric units:
- Fuel used. gallons = distance ÷ MPG (US), or litres = distance ÷ 100 × L/100km (metric). Round trip simply doubles the distance first.
- Total cost. fuel used × price per gallon (or per litre). That's the pump cost of the drive.
- Per person & per mile. the total is divided by the number of passengers for each person's share, and by the distance for the cost per mile (or per km).
Assumptions
- Steady-state fuel economy — real MPG drops in city traffic, cold weather, at high speed, and with a loaded car or AC.
- The gas price you enter is constant for the whole trip.
- L/100km is the inverse of MPG; the calculator converts correctly when you switch units.
Sources
Last reviewed: July 18, 2026
Frequently asked questions
How do you calculate the gas cost of a trip?+
Divide the trip distance by your vehicle's fuel efficiency to get the fuel used, then multiply by the price of gas. In US units: gallons = miles ÷ MPG, and cost = gallons × price per gallon. For a 300-mile trip in a 25-MPG car at $3.50 a gallon that's 12 gallons and $42. This calculator does it for you and can double the distance for a round trip and split the cost between passengers.
How much does gas cost per mile?+
Cost per mile = price per gallon ÷ MPG. At $3.50 a gallon, a 25-MPG car costs about 14 cents a mile, a 35-MPG car about 10 cents, and a 15-MPG truck about 23 cents. Fuel efficiency matters as much as the pump price — the calculator shows your exact cost per mile for the numbers you enter.
How do I estimate my monthly commute gas cost?+
Switch to commute mode and enter the round-trip distance you drive on a commuting day, how many days a week you commute, your MPG, and the gas price. The tool multiplies daily fuel cost by your days per week, then by 52 weeks, and shows the weekly, monthly, and annual totals. A 40-mile round-trip commute five days a week in a 25-MPG car at $3.50 runs about $1,456 a year.
Does the calculator work in kilometres and litres?+
Yes. Switch the units to Metric and enter distance in kilometres, fuel economy as litres per 100 km (L/100km), and price per litre. Note that L/100km is the inverse of MPG — a lower L/100km means a more efficient car — so the calculator converts your figures correctly when you toggle between US and Metric.
Why is my real gas cost higher than the estimate?+
This tool uses steady-state fuel economy. Real-world MPG drops with city stop-and-go driving, high speeds, cold weather, roof racks, a heavily loaded car, running the AC, and idling. If you want a safety margin, use an MPG a few points below your car's rating, or round the result up. The estimate is meant to be close, not exact to the cent.
How much is a full tank of gas?+
Multiply your tank size in gallons by the price per gallon. A 12-gallon tank at $3.50 is $42; a 16-gallon tank is $56; a 24-gallon truck tank is $84. The per-gallon pages on this site show the cost of common amounts — from 1 to 50 gallons — at today's typical prices.
Also try the Gas Cost Calculator.