1. What is a Wattage to kWh Calculator?

Definition: This calculator converts electrical power consumption in watts to energy usage in kilowatt-hours (kWh) based on usage time.

Purpose: It helps homeowners and businesses estimate electricity consumption and costs for various appliances and devices.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy consumption (kilowatt-hours)
• \( P_w \) — Power consumption (watts)
• \( t \) — Time of usage (hours)

Explanation: The power in watts is multiplied by usage time in hours, then divided by 1000 to convert to kilowatt-hours.

3. Importance of Energy Calculation

Details: Understanding energy consumption helps in estimating electricity costs, comparing appliance efficiency, and managing energy usage.

4. Using the Calculator

Tips: Enter the device's power consumption in watts and the duration of usage in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find an appliance's wattage?
A: Check the manufacturer's label, specification sheet, or use a wattage meter to measure actual consumption.

Q2: How do I convert kWh to electricity cost?
A: Multiply kWh by your local electricity rate (typically $0.10-$0.30 per kWh).

Q3: What's the difference between watts and kilowatts?
A: 1 kilowatt = 1000 watts. kWh measures energy (power × time), while watts measure instantaneous power.

Q4: Can I use this for multiple devices?
A: Calculate each device separately, then sum the kWh results for total consumption.

Q5: Does standby power consumption matter?
A: Yes, many devices consume power even when "off." Consider 24/7 usage for devices like modems or smart speakers.