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`fc = 0.6 * C * I * 1 `

Enter a value for all fields

The **Cost to Idle** calculator computes the total fuel cost of idling an engine based on the fuel consumption rate at idle (R), the cost of fuel (C) and the duration of time at idle (I).

**INSTRUCTIONS:** Choose units and enter the following:

- (
**R**) Fuel consumption rate at idle (e.g. 0.6 gallons per hour) - (
**C**) Cost of fuel - (
**I**) Time duration at idle - (
**n**) Number of vehicles at idle.

**Fuel Cost at Idle (FC)**: The calculator returns the fuel costs at idle in U.S. dollars. However, this can be automatically converted to compatible units via the pull-down menu.

The formula for the fuel cost to idle is:

FC = R • C • I • n

where:

- FC is the total fuel cost to idle
- R is the burn rate of fuel at idle
- C is the cost of fuel
- I is the duration of time at idle
- n is the number of vehicles idling

The default value for burn rate of fuel (R) is 0.6 gallons per hour. That's reported to be the burn rate of a Ford F-100 truck at idle. However, one should use the best data available including observed rate measurements from one's own fleet. The following table of idle fuel consumption rates is from the U.S. department of Energy (www.energy.gov) based on a study from Argonne National Laboratory in 2014.

Vehicle Type | Fuel Type | Engine Size (liter) |
Gross Vehicle Weight (GVW) (lbs) |
Idling Fuel Use (Gal/hr with no load) |
---|---|---|---|---|

Compact Sedan | Gas | 2 | - | 0.16 |

Large Sedan | Gas | 4.6 | - | 0.39 |

Compact Sedan | Diesel | 2 | - | 0.17 |

Medium Heavy Truck | Gas | 5-7 | 19,700-26,000 | 0.84 |

Delivery Truck | Diesel | - | 19,500 | 0.84 |

Tow Truck | Diesel | - | 26,000 | 0.59 |

Medium Heavy Truck | Diesel | 6-10 | 23,000-33,000 | 0.44 |

Transit Bus | Diesel | - | 30,000 | 0.97 |

Combination Truck | Diesel | - | 32,000 | 0.49 |

Bucket Truck | Diesel | - | 37,000 | 0.90 |

Tractor-Semitrailer | Diesel | - | 80,000 | 0.64 |

**Gas Mileage Equation:**MPG based on odometer readings and fuel consumed.**Gas Mileage:**MPG based on miles traveled and fuel consumed.**Fuel Dollars per Mile**: Dollars per mile based on miles per gallon and dollars per gallon.**Fuel Expense for Travel:**Cost of travel based on mileage rate and distance traveled.**Cost to Idle**: Cost to idle one or more vehicles for a period of time.**Mileage Tax Deduction:**Allocation based on miles traveled and category of travel (see below).**Time to Travel**: Time driving based on average speed and distance.**Time to Overtake:**Time to intercept based on distance between vehicles and average speed of both**Fuel Price Conversions**:- US Dollars per gallon from Canadian Dollars per Liter
- Canadian Dollars per Liter from US Dollars per Gallon
- US Dollars per gallon to and from Mexican Peso per Liter
- US Dollars per Gallon from Great British Pounds per Liter.
- US Dollars per Gallon from Euros per Liter.
- US Dollars per Gallon from India Rupees per Liter
- US Dollars per Gallon from Japanese Yen per Liter
- US Dollars per Gallon from Chinese Yuan per Liter

- Compare US Dollars per Gallon vs Canadian Dollars per Liter prices
- Compute the Cost of a Road-Trip
- Euro Dollar Calculator combines unit conversions with currency conversions for the European Union and the United States.
- Fuel per Mile: This computes the fuel consumed per unit traveled (e.g. gallons per mile).
- Average Fuel Economy: This computes the miles per gallon or other fuel economy indicators (kilometers per liter)