Generator fuel consumption load × specific consumption It is found that the specific consumption in a diesel generator is typically 0.25–0.30 L/kWh. For example, at a 200 kW load, 0.27 L/kWh results in approximately 54 L/hour, or approximately 1,296 L per day; a 1,000 L tank is sufficient for approximately 18.5 hours.

Consumption (L/h) = Load (kW) × Specific consumption (L/kWh) · Autonomy = Tank / Consumption
Example calculation: 200 kW load, 0.27 L/kWh → 54 L/hour, ≈ 1,296 L per day; autonomy with a 1,000 L tank ≈ 18.5 hours.

Generator Fuel Consumption & Tank Autonomy

Calculate hourly/daily diesel consumption and tank autonomy based on generator load and specific fuel consumption.

Hourly consumption
–
Daily (24 hours)
–
Tank autonomy
–
Notes: Consumption = load × specific consumption. Specific consumption in a diesel generator is typically 0.25–0.30 L/kWh. (varies depending on load ratio and engine); exact value is taken from the manufacturer's fuel curve. Autonomy = tank / hourly consumption.
Get a quote for generator & backup power inspection →

How is it calculated?

  1. Enter the generator load (kW).
  2. Enter the specific fuel consumption (L/kWh) (typically 0.27).
  3. (Optional) Enter the tank volume and press Calculate.

Frequently Asked Questions

How many liters of fuel does the generator consume per hour?
The calculation is load × specific consumption; since the specific consumption of a diesel generator is typically 0.25–0.30 L/kWh, e.g., at a 200 kW load, ≈ 54 L/hour.
What is specific fuel consumption?
Fuel consumption is the amount of fuel consumed per kWh produced (L/kWh); it varies depending on the load ratio and engine, and the exact value is taken from the manufacturer's fuel curve.
How long does a generator tank last?
Tank volume ÷ hourly consumption; at low loads, specific consumption increases, which may reduce autonomy.

Related tools and services

This tool and its content are for general informational purposes only; they do not constitute a binding inspection/declaration of conformity. Definitive results will be determined through on-site inspection in accordance with relevant legislation and standards. Get a quote →