Fuel Tank Fill Cost Calculator
Enter tank size, current level, fuel price and your mileage.
Cost to fill the tank
β
Enter values above
Gallons needed
β
Full-tank range (miles)
β
Weekly fuel cost
β
Weeks per tank
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Cost per mile
β
Worked example
With the default inputs shown below, this calculator returns the following results:
| Input | Value |
|---|---|
| Tank capacity (gallons) | 14 |
| Current fuel level (%) | 25 |
| Fuel price ($/gallon) | 3.5 |
| Fuel efficiency (mpg) | 30 |
| Miles driven per week | 200 |
| Result | Value |
|---|---|
| Cost to fill the tank | $36.75 |
| Gallons needed | 10.5 |
| Full-tank range (miles) | 420 |
| Weekly fuel cost | $23.33 |
| Weeks per tank | 2.1 |
| Cost per mile | $0.12 |
Values shown are produced by this page in your browser; change any input to update them.
How to use the Fuel Tank Fill Cost Calculator
- Tank capacity (gallons) β default 14
- Current fuel level (%) β default 25
- Fuel price ($/gallon) β default 3.5
- Fuel efficiency (mpg) β default 30
- Miles driven per week β default 200
- Press Calculate to update the results instantly.
Frequently asked questions
Aggressive acceleration and high motorway speeds can cut real-world economy by 20β30% against the official figure, so use a realistic mpg rather than the brochure number.
Rarely. A 10 cent saving on a 14-gallon fill is $1.40; a five-mile detour typically costs more than that in fuel and time.
Only slightly. A fuller tank weighs more, which marginally increases consumption, but the difference is negligible compared with running on fumes and risking a breakdown.