Cost Per Watt-Hour Calculator

Formula

The formula to calculate the cost per watt-hour is:

\[ CPWH = \frac{EC}{P} \]

Where:

CPWH is the cost per watt-hour ($/wh)
EC is the electricity cost ($)
P is the total power in watt-hours

What is the Cost Per Watt-Hour?

A cost per watt-hour is a unit of measure used to describe the cost per unit of power times time. Power times time, in this case, is watt-hours. This is used most often when looking at utilities and determining the cost per usage.

Example Calculation

Example 1:

Electricity Cost (EC): $50
Total Power (P): 1000 watt-hours

Step 1: Calculate the cost per watt-hour:

\[ CPWH = \frac{50}{1000} = 0.05 \text{ $/wh} \]

Example 2:

Electricity Cost (EC): $75
Total Power (P): 1500 watt-hours

Step 1: Calculate the cost per watt-hour:

\[ CPWH = \frac{75}{1500} = 0.05 \text{ $/wh} \]