Generator Estimate

Estimate operating costs for any generator based on fuel type, usage hours, and maintenance requirements.

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About This Tool

This comprehensive generator cost estimate tool helps you calculate the total operating expenses for diesel, gasoline, propane, or natural gas generators. Input your generator specifications, fuel costs, and usage patterns to get detailed estimates of fuel consumption, maintenance costs, total operating cost, and cost per hour. Perfect for contractors, facility managers, and homeowners planning generator usage.

Save your calculation history with a free account

How to Use

Select your generator's fuel type (Diesel, Gasoline, Propane, or Natural Gas)
Enter the generator's power rating in kW
Input the expected load percentage (how much of capacity you'll use)
Set the fuel cost per gallon or therm
Enter the number of hours you plan to run the generator
Specify maintenance cost per hour (if known)
Click 'Calculate Estimate' to see detailed cost breakdown
Review results including fuel consumption, total cost, and cost per hour

Frequently Asked Questions

Find Quick Answers

What fuel types does this calculator support?

The tool supports Diesel, Gasoline, Propane, and Natural Gas generators with accurate consumption rates for each fuel type.

How accurate are the fuel consumption estimates?

Estimates are based on standard consumption rates: Diesel (0.07 gal/kWh), Gasoline (0.09 gal/kWh), Propane (0.11 gal/kWh), Natural Gas (0.12 therm/kWh). Actual consumption may vary based on generator efficiency and conditions.

Can I calculate costs for different usage scenarios?

Yes, you can adjust the hours of operation, load percentage, and fuel costs to compare different usage scenarios and find the most cost-effective approach.

What maintenance costs should I include?

Include regular maintenance like oil changes, filter replacements, and professional servicing. Typical maintenance costs range from $0.50 to $2.00 per operating hour depending on generator size and type.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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