KWh to Watts Calculator

kWh to Watts Calculator

Power (watts)

Formula Used:

P(W) = E(kWh) × 1000 / t(hr)

Power in watts is calculated by dividing Energy in Kilowatt-hours by time in hours and multiply with 1000.

This KWh to Watts Calculator helps you convert energy consumption (measured in kilowatt-hours) into power (measured in watts). This is useful for understanding how much power an appliance or system uses over time. Watts to kWh Calculator

How to Use the Calculator

Enter your energy value (in kilowatt-hours, watt-hours, or megawatt-hours)
Enter the period over which the energy was consumed (in hours, minutes, seconds, or days)
Click the Calculate button to see the result

Understanding the Conversion Formula

The relationship between energy and power is straightforward:

$P(W) = 1000 \times \frac{E(kWh)}{t(hr)}$

Where:

P is the power in watts (W)
E is the energy in kilowatt-hours (kWh)
t is the period in hours (hr)
1000 is the conversion factor (1 kWh = 1000 Wh)

Examples

Example 1: Home Appliance Usage

You used 2.5 kWh of electricity running your air conditioner for 4 hours. What was its average power consumption?

$P(W) = 1000 \times \frac{2.5 \text{ kWh}}{4 \text{ hr}} = 625 \text{ W}$

This means your air conditioner draws approximately 625 watts of power when running.

Example 2: Electric Vehicle Charging

Your electric vehicle’s battery holds 75 kWh of energy. If you charge it completely in 10 hours, what’s the charging power?

$P(W) = 1000 \times \frac{75 \text{ kWh}}{10 \text{ hr}} = 7,500 \text{ W} = 7.5 \text{ kW}$

Your charging station must provide 7.5 kilowatts of power to charge the battery in 10 hours fully.

Example 3: Solar Panel Output

Your solar panels generated 8.4 kWh of energy during 7 hours of sunlight. What was their average power output?

$P(W) = 1000 \times \frac{8.4 \text{ kWh}}{7 \text{ hr}} = 1,200 \text{ W} = 1.2 \text{ kW}$

Your solar panel system produced an average of 1.2 kilowatts of power during the day.

Common Conversion Scenarios

Energy	Time	Power Calculation	Result
1 kWh	1 hour	$1000 \times 1 / 1$	1000 W (1 kW)
4.5 kWh	3 hours	$1000 \times 4.5 / 3$	1500 W (1.5 kW)
0.6 kWh	20 minutes (0.33 hr)	$1000 \times 0.6 / 0.33$	1818 W (1.82 kW)
12 kWh	24 hours (1 day)	$1000 \times 12 / 24$	500 W (0.5 kW)