How Idling Fuel Cost Calculator Works?
This tool works by multiplying idling hours by the engine's idle burn rate in gallons per hour, then by the gas price. The result is the money spent on fuel while the vehicle stands still.
Enter idling hours
Type the hours spent idling in a period, for example 14 hours per month.
Enter the idle burn rate
Type the gallons burned per hour at idle. Passenger cars burn 0.2 to 0.5 gallons (0.8 to 1.9 L) per hour.
Enter the gas price
Type the price per gallon.
Read the idling cost
The tool returns the dollars lost to idling.
Idling Fuel Cost Calculator Formula
The formula is Idling Cost = Idling Hours × Burn Rate × Gas Price.
Idling Cost = Hours × Gallons per Hour × Gas PriceFormula variables
- Hours
- Time spent idling.
- Gallons per Hour
- Idle fuel burn rate.
- Gas Price
- Dollars per US gallon (3.785 L).
Worked example
- Idling Hours (e.g. per month): 14 hours
- Idle Burn Rate (gal/hr): 0.5 gal/hr
- Gas Price: $3.65/gal
- Fuel burned: 14 × 0.5 = 7 gallons (26.5 L).
- Cost: 7 × $3.65 = $25.55.
Result: $25.55 ($ lost idling)
$25.55 per month adds up to $306.60 per year. Restarting a warm engine uses less fuel than 10 seconds of idling, so switching off during waits longer than 1 minute saves money.
Idling Fuel Cost Calculator Conversion Table
The table shows idling costs for 4 idle durations at 3 burn rates, with gas at $3.65 per gallon.
Rows: Idling Hours (e.g. per month) (hours). Columns: Idle Burn Rate (gal/hr) (gal/hr). Cells: $ lost idling.
| hours | 0.2 gal/hr | 0.5 gal/hr | 0.8 gal/hr |
|---|---|---|---|
| 5 hours | $3.65 | $9.13 | $14.60 |
| 14 hours | $10.22 | $25.55 | $40.88 |
| 30 hours | $21.90 | $54.75 | $87.60 |
| 60 hours | $43.80 | $109.50 | $175.20 |
Values held constant: Gas Price = $3.65/gal.
60 hours of idling at 0.8 gallons (3 L) per hour, common for large trucks, costs $175.20.
What is Idling Fuel Cost Calculator?
The Idling Fuel Cost Calculator is a tool that measures the fuel cost of running an engine while the vehicle is not moving. Idling burns fuel at 0 MPG.
Drivers idle in drive-throughs, school pickup lines, traffic jams, and while warming up the engine. Delivery and work trucks often idle for hours each day.
Engine size sets the burn rate. Larger engines and running air conditioning raise the gallons per hour.
What are the uses of Idling Fuel Cost Calculator?
There are 4 main uses of the Idling Fuel Cost Calculator: setting fleet anti-idling policies, changing personal habits, valuing start-stop systems, and pricing work truck idling.
Setting fleet anti-idling policies
Fleet managers show drivers the dollar cost of idling.
Changing personal habits
Drivers see the cost of long warm-ups and pickup-line waits.
Valuing start-stop systems
Buyers value engines that shut off at stops.
Pricing work truck idling
Contractors price idling for trucks that run tools on site.
Need every metric in one place? Open the main MPG Cost Calculator or browse all 101 fuel calculators.