Electrical Power Calculator
Calculate power, voltage, current, and resistance using Ohm's Law and power formulas
kWh
/kWh
Ah
V
Calculation Results
P
Power
-
V
Voltage
-
I
Current
-
R
Resistance
-
Ohm's Law & Power Formula
P = V × I V = I × R I = V ÷ R R = V ÷ I
For AC circuits: P = V × I × PF (Power Factor)
⚡
Daily Energy
-
📅
Monthly Energy
-
💰
Monthly Cost
-
🌍
CO₂ Emissions
-
⚠️
Safety Warning
Your calculated values appear to be within safe limits.
📊
Energy Used
-
💰
Energy Cost
-
🧾
Tax Amount
-
💵
Total Bill
-
☀️
Solar Panel Size
-
🔋
Battery Backup
-
⏱️
Charging Time
-
💡
System Efficiency
-
Energy Saving Tips
Use LED bulbs instead of incandescent bulbs
Unplug electronics when not in use
Set your thermostat efficiently
Use energy-efficient appliances
Share this Tool
Help others discover this useful calculator
Support Our Work
If you find this tool helpful, consider supporting us with a donation