Emergency & Generators· Commercial
Diesel Generator (DG Set) Fuel Consumption & Sizing Calculator
For societies, commercial offices, and bungalows: enter your required power load in kW to find the recommended DG set rating in kVA, hourly diesel consumption in liters at 50%, 75%, and 100% load, and total running cost per hour.
Recommended DG Set Capacity
35 kVA
For a continuous running load of 20 kW.
Hourly Diesel Consumption:5.4 L / hr
Hourly Fuel Running Cost:₹497/hr
Full Shift (8h Power Cut):₹3,976
Diesel Fuel Price (₹/L):₹92
Required Power Load in kW
20 kW2 kW (Small Shop)20 kW (Society Lift/Pumps)100 kW (Factory/Mall)
Quick Commercial Sizing Presets
How This Calculation Works & Technical Formula
DG kVA = Total kW / 0.8 PF × 1.25 safety factor. Diesel Consumption (L/hr) ≈ 0.25 to 0.28 liters per kWh generated at 75% load.
How to use this tool:
- Input total running load in kW or list equipment.
- Set average running load percentage (typically 70-75%).
- Set prevailing diesel price per liter (e.g. ₹90-₹96/L).
- View recommended DG size in kVA, hourly liters consumed, and per-hour operational cost.
Frequently Asked Questions
How much diesel does a 25 kVA generator consume per hour?+
A typical 25 kVA diesel generator consumes approximately 4.5 to 5.5 liters of diesel per hour when operating at 70-75% load, which equals about ₹420 to ₹520 per hour in fuel cost.
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