Energy Cost Calculator: Understand Your Electricity Bill

⚡ Hong Kong EnergyWise Calculator

Calculate your appliance energy costs with Hong Kong's actual electricity tariffs

Curious about your electricity bills? Our energy cost calculator helps you understand your electricity charges in Hong Kong. Get a quick estimate of your appliance's energy use and see how it affects your Hong Kong electricity bill. It's a simple way to check the electricity cost in Hong Kong and manage your expenses.

📚 How Electrical Power & Energy Cost Calculation Works

Understanding Power (功率)

Power is measured in Watts (W) and represents how much energy an appliance uses per second. You can calculate power using these formulas:

Power (P) = Voltage (V) × Current (I)

Example: 220V × 10A = 2,200W (2.2kW)

Power (P) = Current (I)² × Resistance (R)

Example: 10A × 10A × 20Ω = 2,000W (2kW)

Understanding Energy Consumption (kWh)

Energy consumption is measured in kilowatt-hours (kWh) or "units" (度電). This is what appears on your electricity bill:

Energy (kWh) = Power (W) ÷ 1000 × Hours Used

Example: 6,000W appliances running for 1 hour = 6kWh

Real-World Example

If you run these appliances simultaneously for 1 hour:

Air Conditioner: 2,200W
Water Heater: 3,500W
Lights: 300W
Total: 6,000W = 6kWh per hour

Hong Kong Electricity Providers

CLP Power: Serves Kowloon, New Territories, Lantau Island
HK Electric: Serves Hong Kong Island, Lamma Island

Select Provider:

Quick Select (Optional):

Select an appliance to auto-fill typical values, or enter your own below

Calculation Method:

Power Consumption (Watts):

Enter the actual power consumption of your appliance

Voltage (V):

Current (A):

Resistance (Ω):

Hours per day:

Days per week:

Calculation History

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Frequently Asked Questions (Q&A)

Q1: How is my electricity charge calculated?

A1: Your electricity bill in Hong Kong is based on your consumption. We use the latest tariffs from power companies to estimate your electricity charges. The final electricity charge on your bill may vary slightly.

Q2: Why is my electricity bill so high?

A2: High electricity bills can be due to several factors, including appliance usage, seasonal changes, and tariff rates. Our calculator helps you identify which appliances contribute most to your electricity cost Hong Kong.

Q3: What is the current electricity price in Hong Kong?

A3: The electricity price in Hong Kong depends on your power company (CLP or HK Electric) and your consumption level. Our tool uses up-to-date tariff information to provide an accurate estimate of your electricity cost in Hong Kong.

Q4: How can I lower my Hong Kong electricity bill?

A4: Understanding your usage is the first step. Use our calculator to see the costs of different appliances. You can save money by using energy-efficient appliances and being mindful of your daily habits.