Energy - PowerFree

Electricity vs Generator Cost Calculator

Compare the cost of using grid electricity versus running a fuel-powered generator.

Enter Values

Electrical Load (Watts)

Grid Electricity Rate (per kWh)

Generator Consumption (L/hr)

Fuel Price (per Litre)

Result

Enter values above and click Calculate to see your result.

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Formula

Core Formula

\text{Generator: L/hr} \times \text{Price} \quad \text{vs} \quad \text{Watts} \times \text{Grid Rate}

How it works: Calculates the hourly cost for both energy sources based on current fuel and electricity prices.

Worked Example

Operating a 2kW load on the grid ($0.15/kWh) costs $0.30/hr, while a small generator using 1L/hr ($1.50/L) costs $1.50/hr.

Grid vs Self-Generation

In most scenarios, grid power is significantly cheaper than generator-based power.

Generators are best used as emergency backup, not primary power.
Rising fuel prices increase the gap between grid and generator costs.
Noise and emission environmental costs are not factored into this calculation.

Use this to justify investments in solar or UPS systems.

You can also calculate changes using our Generator Running Cost Calculator or Electricity Bill Calculator.

Frequently Asked Questions

Why is generator power so expensive?

Fuel-based power generation is typically less efficient than large-scale power plants.

What about maintenance costs?

Generators require regular servicing which adds to the long-term cost difference.

How can I put this Electricity vs Generator Cost Calculator on my blog or website?

Yes, the Electricity vs Generator Cost Calculator is fully embeddable. Tap "Embed" above to configure appearance and copy the code. It is free to use, works on any platform (HTML, WordPress, CMS), and adjusts to any screen size automatically. Visit calculory.com/services/embed-calculators for the complete guide.

AI Assistant

Ask about this calculator

I can help you understand the electricity vs generator cost calculator formula, interpret your results, and answer follow-up questions.

Try asking

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