kW measures power (rate of energy use). kWh measures energy (total consumption). Your electricity bill is in kWh.
kWh = kW × Hours. Simply multiply power by time.
Electricity is billed per kWh. Know your consumption to estimate costs.
Electricity billing, solar panel sizing, battery capacity planning.
1 kWh = running a 1 kW appliance for 1 hour. Costs $0.10–$0.30 typically.
Power × Time = Energy.
kW is instantaneous power. Multiply by hours to get total energy consumed (kWh).
2 steps to calculate energy.
Check the appliance label or meter reading for power in kW.
kWh = kW × hours of operation. A 2 kW heater for 3 hours = 6 kWh.
Multiply kWh by your electricity rate (e.g., $0.12/kWh).
Energy consumption at various run times.
| kW | 1 hr | 4 hr | 8 hr | 12 hr | 24 hr |
|---|---|---|---|---|---|
| 1 | 1 | 4 | 8 | 12 | 24 |
| 2 | 2 | 8 | 16 | 24 | 48 |
| 5 | 5 | 20 | 40 | 60 | 120 |
| 10 | 10 | 40 | 80 | 120 | 240 |
| 25 | 25 | 100 | 200 | 300 | 600 |
| 50 | 50 | 200 | 400 | 600 | 1,200 |
Everyday energy consumption scenarios.
1.5 kW heater for 8 hours:
1.5 × 8 = 12 kWh ($1.44 at $0.12/kWh)
3.5 kW AC for 10 hours:
3.5 × 10 = 35 kWh ($4.20 at $0.12/kWh)
50 kW motor for 24 hours:
50 × 24 = 1,200 kWh
25 free conversion tools — each with its own unique calculator, interactive visuals, and detailed explanations.
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Common questions about kW to kWh conversion.
kW is power (rate of energy use). kWh is energy (total consumed). A 1 kW device running 1 hour uses 1 kWh.
Multiply each appliance kW × hours used to get kWh. Then multiply total kWh by your rate (e.g., $0.12/kWh).
Average US home uses ~30 kWh/day or ~900 kWh/month. Varies by climate and appliances.
No. 1 kW is power, 1 kWh is energy. You get 1 kWh when 1 kW runs for exactly 1 hour.
Varies by region: $0.10–$0.40 in the US, €0.20–€0.50 in Europe. Check your utility bill.