Diesel Cost Calculator — Generator Fuel Tracker
Calculate total diesel cost, monthly generator fuel spend, and cost per kWh. Helps you compare grid vs generator costs.
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Monthly Fuel Cost
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Cost Per kWh
Diesel Consumption Reference
| Generator Size | L/hour (50% load) | L/hour (75% load) | Hours per 20L |
|---|---|---|---|
| 2.5 KVA | 0.6 | 0.8 | 25–33 |
| 5 KVA | 1.0 | 1.4 | 14–20 |
| 7.5 KVA | 1.5 | 2.0 | 10–13 |
| 10 KVA | 2.0 | 2.8 | 7–10 |
| 20 KVA | 4.0 | 5.5 | 4–5 |
Frequently Asked Questions
How much does diesel cost in Nigeria?
Diesel (Automotive Gas Oil / AGO) prices vary. As of early 2025, diesel costs approximately ₦1,100–₦1,400 per litre across Nigeria, with Lagos and Abuja on the higher end. Prices fluctuate with global oil prices and FX rates.
How much diesel does a generator consume per hour?
A typical 5 KVA diesel generator consumes about 1–1.5 litres per hour at 50–75% load. A 10 KVA generator uses 2–3 litres/hour. As a rough estimate: 0.25–0.35 litres per KVA per hour.
How do I reduce diesel consumption?
Run the generator at 50–75% of rated load for best efficiency. Avoid running it at very low load (under 25%). Switch off high-draw appliances when generator is running. Service the generator regularly — dirty filters increase fuel consumption by 10–20%.
What is the cost per kWh from a diesel generator?
At ₦1,200/litre and 0.35 L/kWh consumption, generator electricity costs about ₦420/kWh. This is nearly double the Band A grid rate. Over a year, this makes generator power extremely expensive compared to solar or grid.
Should I buy a petrol or diesel generator for my home?
For generators above 3.5 KVA used more than 4 hours daily, diesel is more cost-efficient per kWh despite higher upfront cost. For occasional light use, petrol generators are more affordable initially. Diesel engines also last longer (20,000+ hours vs 5,000 for petrol).