1. What is Watts per Mile?

Watts per mile (W/mile) is a unit of measurement that indicates how much electrical power an electric vehicle consumes to travel one mile. It's commonly used to compare energy efficiency between different EV models.

2. How Does the Conversion Work?

The conversion from kWh/mile to W/mile is straightforward:

Where:

• 1 kWh = 1000 Wh
• 1 Wh = 1 W × 1 hour

Explanation: Since 1 kilowatt equals 1000 watts, we simply multiply the kWh/mile value by 1000 to get W/mile.

3. Importance in Electric Vehicles

Details: W/mile is a crucial metric for comparing EV efficiency, calculating range, and estimating charging costs. Lower values indicate more efficient vehicles.

4. Using the Calculator

Tips: Enter your vehicle's energy consumption in kWh/mile (typically between 0.2-0.5 kWh/mile for efficient EVs). The calculator will instantly convert it to W/mile.

5. Frequently Asked Questions (FAQ)

Q1: What's a good W/mile value for an EV?
A: Most efficient EVs achieve 200-300 W/mile. Values above 350 W/mile indicate less efficient vehicles.

Q2: How does this relate to MPGe?
A: MPGe (miles per gallon equivalent) is another efficiency metric that can be calculated from W/mile using standard conversion factors.

Q3: Why use W/mile instead of kWh/mile?
A: W/mile provides a more granular measurement (no decimal places) which is useful for precise calculations and comparisons.

Q4: How does speed affect W/mile?
A: Higher speeds typically increase W/mile due to greater air resistance. Most efficient speeds are usually 30-50 mph.

Q5: Can I use this for Excel calculations?
A: Yes, the formula is simple to implement in Excel: =kWh_cell*1000