1. What is a kW per Hour Calculator?

Definition: This calculator computes energy consumption in kilowatt-hours (kWh) based on power in kilowatts (kW) and time in hours.

Purpose: It helps determine electrical energy usage for appliances, machinery, or entire facilities over a period of time.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy (kWh)
• \( P \) — Power (kW)
• \( t \) — Time (hours)

Explanation: Energy consumption is simply the product of power and time. 1 kWh equals 1 kW of power used for 1 hour.

3. Importance of Energy Calculation

Details: Accurate energy calculations help with electricity cost estimation, energy efficiency planning, and sizing electrical systems.

4. Using the Calculator

Tips: Enter the power consumption in kW and the operating time in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW and kWh?
A: kW measures power (instantaneous rate of energy use), while kWh measures energy (power × time).

Q2: How do I convert watts to kW?
A: Divide watts by 1000 (1 kW = 1000 W).

Q3: Can I use minutes instead of hours?
A: Yes, but convert minutes to hours (divide by 60) before entering the value.

Q4: How accurate is this calculation?
A: It's precise for constant power consumption. For variable loads, use average power.

Q5: How can I estimate my electricity cost?
A: Multiply kWh result by your electricity rate (per kWh) from your utility bill.