10 HP Motor Running Cost Calculator

Find the electricity cost of running a 10 HP (7.5 kW) industrial motor — the most common workhorse size for compressors, larger pumps, and machine tools in Indian factories.

⚡ 10 HP / 7.5 kW

Enter Your Operating Conditions

Motor power is fixed at 10 HP (7.5 kW). Adjust load, efficiency, hours and tariff to your situation.

Typical: 75–85% for 10 HP motors
10 HP IE2: 88.7% min | IE3: 90.4% min
Industrial tariff in India: typically ₹6–12 per kWh

📊 10 HP Motor Cost Breakdown

Actual Power Draw
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Cost per Hour
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Cost per Day
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Cost per Month
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⚡ Annual Electricity Cost (10 HP)
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Monthly Energy Consumption
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Formula: Actual kW = 7.5 × Load% ÷ Efficiency%  |  Cost = Actual kW × Hours × Tariff
💡 IE3 Upgrade for 10 HP: A 10 HP IE3 motor saves about —/month vs IE1. Single-shift payback typically 18–24 months. For 24×7 operation, payback drops below 8 months — a clear win.

About 10 HP Motors

10 HP (7.5 kW) is the workhorse of Indian small-to-medium industry. Air compressors, larger centrifugal pumps, conveyors, machine-tool drives, hydraulic power packs, mixers — anywhere you need real torque without the cost or complexity of HT motors.

Electrical input: At full load with 90% efficiency, a 10 HP motor draws about 8.3 kW. At the more typical 80% load, input falls to ~6.7 kW.

Starting current: 6–7× full-load current with DOL (~110 A peak at 415V). At this size, star-delta starter is mandatory per most state electricity board norms. A soft starter adds smooth ramp-up but costs ~₹18,000–25,000.

BEE / IS 12615 mandate: 10 HP motors sold in India must be IE3 or higher since 2024. Older IE1 motors still in service are typically 4–6% less efficient than the IE3 minimum.

⚡ Compare Other Motor Sizes

🏭 Any HP Motor (Custom) 5 HP Motor Cost 7.5 HP Motor Cost 15 HP Motor Cost 20 HP Motor Cost

📘 Related Resources

Disclaimer

Educational estimate based on typical 10 HP motor characteristics. Real consumption depends on motor model, ambient conditions, supply voltage and load profile.

Worked Examples — 10 HP Motor

These examples assume 80% load factor and 90% efficiency (actual electrical draw ≈ 6.7 kW). For your exact case, plug your numbers into the calculator above.

Example 1 — Single shift (8 hrs/day)

Conditions: 8 hrs/day, 26 days/month, ₹8/kWh

Daily energy = 6.7 × 8 = 53.3 kWh/day
Monthly energy = 53.3 × 26 = 1,387 kWh/month
Monthly cost = 1,387 × ₹8 = ₹11,090/month
Annual cost ≈ ₹1,33,000/year

Example 2 — Double shift (16 hrs/day)

Conditions: 16 hrs/day, 26 days/month, ₹8/kWh

Daily energy = 6.7 × 16 = 106.6 kWh/day
Monthly cost = 106.6 × 26 × ₹8 = ₹22,180/month
Annual cost ≈ ₹2,66,000/year

Example 3 — Continuous (24×7)

Conditions: 24 hrs/day, 30 days/month, ₹8/kWh

Monthly energy = 6.7 × 24 × 30 = 4,824 kWh/month
Monthly cost ≈ ₹38,600/month
Annual cost ≈ ₹4,63,000/year

At process-plant scales (24×7), a single 10 HP motor costs over ₹4.5 lakh/year. Multiply by 10–20 motors and you have a meaningful annual budget — and a meaningful payback window for any efficiency upgrade.

Frequently Asked Questions — 10 HP Motor

A 10 HP motor (7.5 kW rated) at 80% load and 90% efficiency draws about 6.7 kW — so it uses 6.7 kWh per hour. At full load, input rises to ~8.3 kW. Lower load doesn't proportionally lower input because of fixed losses (iron + friction).

At 8 hrs/day, ₹8/kWh: a 10 HP motor uses about 53 kWh/day costing roughly ₹427/day. Across 26 working days, that's about ₹11,090/month. Continuous (24×7) operation pushes the daily cost to ~₹1,287.

At 8 hrs/day and 26 working days, a 10 HP motor consumes approximately 1,387 units (kWh) per month. Monthly cost at ₹8/kWh ≈ ₹11,090. Continuous operation (24 hrs × 30 days) consumes ~4,800 kWh/month.

Yes. 10 HP × 0.746 = 7.46 kW, conventionally labelled 7.5 kW on Indian motor nameplates. That's the mechanical output rating. Electrical input (which determines your bill) depends on efficiency — at 90% efficiency, full-load input is ~8.3 kW.

Generally no. CEA Indian electrical norms require star-delta or soft starter for motors above 7.5 kW (which 10 HP exceeds). DOL on 10 HP draws ~110 A peak — causes voltage dips, stresses windings, and may violate your supply contract. Star-delta cuts inrush to ~37 A. For frequent starts or process control, choose a soft starter or VFD.

Upgrading from IE1 to IE3 typically saves 6–8% on electricity. For a 10 HP motor running 8 h/day, 26 days/month at ₹8/kWh, that's roughly ₹720–900/month or ₹8,500–10,800/year. The IE3 motor costs ~₹15,000 more — payback typically 18–24 months at single-shift, under 8 months at 24×7.

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