⚙️ Energy
Motor Energy Cost Calculator
Calculate the monthly electricity running cost of any industrial motor based on its rating, load, efficiency and tariff.
1 HP = 0.746 kW
Typical: 75–85%
IE2: 88–92%
📊 Motor Cost Breakdown
Actual Power Draw
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Cost per Hour
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Cost per Day
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Monthly Energy
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Monthly Cost
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How This Calculator Works
Actual Draw (kW) = Rated kW × Load Factor ÷ Efficiency
Monthly kWh = Actual Draw × Hours/day × Days/month
Cost = Monthly kWh × Tariff (₹/kWh)
Upgrading from IE1 to IE3 motor typically saves 4–8% on running cost.
🔗 Related Calculators
Motor Energy Cost Formula
The actual power drawn by a motor is always higher than its mechanical output because of losses inside the motor. Motor efficiency (typically 85–93% for modern IE2/IE3 motors) accounts for this difference. Always use actual drawn power for cost calculations, not the nameplate rating.
IE Motor Efficiency Classes
| Class | Efficiency (10kW) | Status |
|---|---|---|
| IE1 | ~87% | Standard (phased out) |
| IE2 | ~89% | High efficiency |
| IE3 | ~91% | Premium (BEE recommended) |
| IE4 | ~93% | Super premium |
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