Cheaper Station Detour Calculator
Cheaper Station Detour Calculator. Compare fuel savings with detour consumption. Enter your values and view the result.
Cheaper Station Detour Calculator
Compare fuel savings with detour consumption.
Use the calculation engine below to model your exact costs with custom fuel prices, distances, and vehicle efficiencies:
Cheaper Station Detour 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 Cheaper Station Detour Calculator Works
This tool works by comparing the money saved at a lower-priced station with the fuel burned on the extra miles needed to reach that station.
- Step 1
Enter both station prices
Type the price at the nearby station and the price at the cheaper station.
- Step 2
Enter the fill-up amount
Add the gallons or liters you plan to buy. Most passenger car fill-ups range from 10 to 15 gallons (38 to 57 liters).
- Step 3
Enter the detour distance
Type the extra round-trip miles or kilometers needed to reach the cheaper station.
- Step 4
Read the net saving
The calculator shows gross saving, detour fuel cost, net saving, and the break-even detour distance.
Cheaper Station Detour Calculator Formula
The formula subtracts the detour fuel cost from the gross price saving.
Gross Saving = (Near Price − Cheap Price) × Gallons Bought
Detour Cost = (Detour Miles ÷ MPG) × Cheap Price
Net Saving = Gross Saving − Detour Cost
Break-Even Detour = (Price Gap × Gallons × MPG) ÷ Cheap Price
- Price Gap
- = difference in price per gallon between the stations
- Gallons Bought
- = fuel purchased at the cheaper station
- Detour Miles
- = extra round-trip distance to the cheaper station
Worked Example
- Station A sells gas at $3.50 and Station B at $3.30, a gap of $0.20 per gallon ($0.053 per liter).
- Gross saving on 14 gallons (53 L) = $0.20 × 14 = $2.80.
- Detour cost for 6 extra miles (9.7 km) at 25 MPG = 0.24 gal × $3.30 = $0.79.
- Net saving = $2.80 − $0.79 = $2.01; break-even detour = (0.20 × 14 × 25) ÷ 3.30 = 21.2 miles.
Cheaper Station Detour Calculator Conversion Table
The table lists the maximum round-trip detour that still saves money for a 12-gallon (45.4 L) fill-up in a 25 MPG car at a $3.30 cheaper price.
| Price Gap / gal | Price Gap / L | Gross Saving | Break-Even Detour (mi) | Break-Even Detour (km) |
|---|---|---|---|---|
| $0.05 | $0.013 | $0.60 | 4.5 | 7.3 |
| $0.10 | $0.026 | $1.20 | 9.1 | 14.6 |
| $0.15 | $0.040 | $1.80 | 13.6 | 21.9 |
| $0.20 | $0.053 | $2.40 | 18.2 | 29.3 |
| $0.30 | $0.079 | $3.60 | 27.3 | 43.9 |
| $0.40 | $0.106 | $4.80 | 36.4 | 58.5 |
| $0.50 | $0.132 | $6.00 | 45.5 | 73.2 |
Keep detours well under the break-even distance, since time spent driving has value too.
What is a Cheaper Station Detour Calculator?
A Cheaper Station Detour Calculator is a fuel savings tool that tells a driver whether driving to a cheaper gas station saves money after counting the extra fuel burned.
A price gap of $0.10 per gallon looks attractive on a sign, but a 12-gallon fill-up saves only $1.20. A 10-mile detour in a 25 MPG car burns 0.4 gallons, worth $1.32. The Cheaper Station Detour Calculator runs that check in seconds.
The calculator returns a break-even distance, which gives drivers a fixed rule for their car: drive to the cheaper station only when the detour is shorter than that number.
What are the uses of a Cheaper Station Detour Calculator?
There are 4 main uses of the Cheaper Station Detour Calculator, including fill-up decisions, warehouse club checks, and app price alerts.
Decide on a fill-up
Check a price-app alert before driving across town for a lower price.
Test warehouse club stations
See whether a long drive to a club station beats the local price.
Set a personal detour rule
Save the break-even distance for your car and fill-up size.
Plan fleet fueling
Tell drivers which stations are worth the extra miles on their routes.