1. What is the Watts per Hour Calculation?

The Watts per Hour calculation converts power consumption (in watts) over time (in hours) into energy consumption (in kilowatt-hours). This helps estimate electricity usage and costs for appliances and devices.

2. How Does the Calculator Work?

The calculator uses the energy consumption formula:

Where:

• \( kWh \) — Kilowatt-hours (energy consumption)
• \( P \) — Power in watts (W)
• \( h \) — Time in hours
• 1000 — Conversion factor from watts to kilowatts

Explanation: The formula calculates how much energy is used when a device runs at a certain power for a specific duration.

3. Importance of Energy Calculation

Details: Calculating energy consumption helps in understanding electricity costs, comparing appliance efficiency, and managing energy usage for cost savings and environmental impact.

4. Using the Calculator

Tips: Enter the power rating of your device (usually found on its label) in watts, and the duration of use in hours. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is "watts per hour" the correct term?
A: Technically no - watts are already a rate (joules per second). We're calculating energy (watt-hours) from power (watts) and time (hours).

Q2: How do I find my appliance's wattage?
A: Check the label or manual. If only amps and volts are given, multiply them (P = I × V).

Q3: What's the difference between watts and watt-hours?
A: Watts measure power (rate of energy use), watt-hours measure total energy consumed.

Q4: How can I estimate monthly costs from kWh?
A: Multiply kWh by your electricity rate (per kWh) and by days used per month.

Q5: Are there devices that don't use constant power?
A: Yes, devices like refrigerators cycle on/off. For these, use average power over time.