To figure out how much electricity we use and what it costs, we can use some simple math formulas. The main formula we need is:

Energy = Power × Time

Here’s what the terms mean:

• Energy (E) = This is the amount of electricity we use, measured in kilowatt-hours (kWh).
• Power (P) = This tells us how much electricity a device uses, measured in kilowatts (kW).
• Time (t) = This is how long the device is used, measured in hours (h).

Let's break this down step-by-step!

Step 1: Calculate Power Usage

Imagine you have a device that uses 1000 watts, which is the same as 1 kilowatt (1 kW).

If you use this device for 5 hours, you can calculate the energy consumption like this:

Energy = 1 kW × 5 hours = 5 kWh

Step 2: Estimate the Cost

Now, let’s say the cost of electricity is 12 cents per kWh. To find out how much money you spent, you multiply the energy you used by the cost:

Cost = Energy × Rate
Cost = 5 kWh × $0.12 per kWh =$0.60

So, if you run this device for 5 hours, it will cost you 60 cents.

By using this simple method to figure out how much energy you use and multiplying it by the rate, you can easily estimate your electrical expenses!