Natural Gas Generator Consumption Calculator
Use a natural gas generator consumption calculator to quickly estimate how much fuel your generator uses. Plan your energy costs, runtime, and efficiency with simple inputs.
Fuel Consumption Estimator
How to Use Natural Gas Generator Consumption Calculator
Follow these simple steps to use the natural gas generator consumption calculator:
Step-by-Step Instructions
- Enter Generator Size (kW): Input the rated power of your generator (e.g., 10 kW, 20 kW).
- Select Load Percentage: Choose how much load you use (e.g., 50%, 75%, 100%).
- Input Runtime (Hours): Enter how long you plan to run the generator.
- Add Fuel Rate (if required): Some calculators ask for cubic feet per hour (CFH) or BTU consumption. Our default is 10 CFH/kW.
- Click Calculate: The calculator will show total natural gas consumption.
- Use accurate load estimates for better results.
- Check your generator manual for fuel consumption rates.
How to Calculate Natural Gas Generator Consumption
You can manually calculate natural gas generator consumption using a simple formula.
Basic Formula
Where the Fuel Rate is typically provided at 100% load. If running at a partial load, adjust the kW accordingly.
Step-by-Step Example
Example: Generator Size = 20 kW, Load = 75%, Fuel Consumption Rate = 10 CFH per kW at full load.
Step 1: Adjust Load
Effective kW = 20 × 0.75 = 15 kW
Step 2: Calculate Consumption per Hour
Consumption = 15 × 10 = 150 CFH
Step 3: Multiply by Runtime
If runtime = 5 hours:
Total Consumption = 150 × 5 = 750 cubic feet
Final Answer: Your generator uses 750 cubic feet of natural gas in 5 hours.
Natural Gas Generator Consumption Conversion Chart
| Generator Size (kW) | Load (%) | Consumption (CFH) | Consumption (m³/hr) |
|---|---|---|---|
| 5 kW | 50% | 25 CFH | 0.71 m³/hr |
| 10 kW | 75% | 75 CFH | 2.12 m³/hr |
| 15 kW | 100% | 150 CFH | 4.25 m³/hr |
| 20 kW | 75% | 150 CFH | 4.25 m³/hr |
| 30 kW | 100% | 300 CFH | 8.50 m³/hr |
Note: 1 cubic meter (m³) ≈ 35.31 cubic feet (CF)
FAQs – Natural Gas Generator Consumption Calculator
A natural gas generator consumption calculator estimates how much fuel your generator uses based on size, load, and runtime.
A 20 kW generator typically uses 150–200 CFH depending on load.
Yes. Higher load increases fuel consumption. Lower load reduces it.
Common units include: Cubic feet per hour (CFH), Cubic meters per hour (m³/hr), and BTU per hour.
Run the generator at optimal load, avoid overloading, and maintain your generator regularly.
Natural gas is often cheaper and cleaner, but availability depends on location.
Yes. Multiply total gas usage by your local gas price per unit.
It provides estimates. Always check your generator’s manual for exact data.
CFH means cubic feet per hour. It measures how much gas the generator uses.
Yes. It works for both residential and commercial generators.