Remaining Tank Range Calculator
Remaining Tank Range Calculator. Use estimated remaining fuel. Enter your values and view the result.
Remaining Tank Range Calculator
Use estimated remaining fuel.
Use the calculation engine below to model your exact costs with custom fuel prices, distances, and vehicle efficiencies:
Remaining Tank Range Calculator: inputs
Adjust sliders or enter exact figures
Monthly Fuel Budget
Real-Time Visual Breakdown
Comparing your expense against alternative vehicle classes
Price Fluctuation Stress Test
See how unexpected gas price surges would impact your monthly budget
How Remaining Tank Range Calculator Works
This tool works by converting the fuel gauge reading into estimated fuel left, then multiplying by fuel economy.
- Step 1
Enter tank capacity
Type the full tank capacity in gallons or liters.
- Step 2
Read the fuel gauge
Enter the gauge position as a fraction, such as 3/8, or as a percentage.
- Step 3
Enter fuel economy
Type the MPG or L/100 km for the driving ahead.
- Step 4
Read the remaining range
The calculator shows estimated fuel left and the distance it covers.
Remaining Tank Range Calculator Formula
The formula multiplies the gauge fraction by capacity and fuel economy.
Fuel Left = Tank Capacity × Gauge Fraction
Remaining Range = Fuel Left × MPG
- Gauge Fraction
- = gauge reading as a decimal (3/8 = 0.375)
- Fuel Left
- = estimated fuel remaining in the tank
Worked Example
- A crossover with a 16-gallon (60.6 L) tank shows 3/8 on the gauge and returns 25 MPG.
- Fuel left = 16 × 0.375 = 6 gallons (22.7 liters).
- Remaining range = 6 × 25 = 150 miles (241 km).
- Fuel gauges are not linear. Treat the result as an estimate and refuel before 1/8.
Remaining Tank Range Calculator Conversion Table
The table converts gauge positions into fuel left and range for a 16-gallon (60.6 L) tank at 25 MPG.
| Gauge | Fuel Left (gal) | Fuel Left (L) | Range (mi) | Range (km) |
|---|---|---|---|---|
| 1/8 | 2.0 | 7.6 | 50 | 80 |
| 1/4 | 4.0 | 15.1 | 100 | 161 |
| 3/8 | 6.0 | 22.7 | 150 | 241 |
| 1/2 | 8.0 | 30.3 | 200 | 322 |
| 5/8 | 10.0 | 37.9 | 250 | 402 |
| 3/4 | 12.0 | 45.4 | 300 | 483 |
| 7/8 | 14.0 | 53.0 | 350 | 563 |
| Full | 16.0 | 60.6 | 400 | 644 |
What is a Remaining Tank Range Calculator?
A Remaining Tank Range Calculator is a range tool that estimates the distance left from the fuel gauge reading.
Older cars and many trucks have no distance-to-empty display. Drivers see only a needle. The Remaining Tank Range Calculator turns that needle position into gallons, liters, miles, and kilometers.
Fuel gauges often read full for the first 50 to 80 miles and drop faster near empty. The estimate works best between 3/4 and 1/4.
What are the uses of a Remaining Tank Range Calculator?
There are 4 main uses of the Remaining Tank Range Calculator, including low-fuel decisions, older-car range checks, and rental car returns.
Decide when to refuel
Check whether the gauge reading covers the drive ahead.
Estimate range in older cars
Get a range figure without a trip computer.
Return rental cars
Estimate how much fuel to add before return.
Check a borrowed vehicle
Estimate range in an unfamiliar car.