1. What is Watts per Mile?

Watts per mile (W/mile) is a unit that measures the power consumption of an electric vehicle per distance traveled. It indicates how efficiently the vehicle uses energy to move.

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
• Therefore, 1 kWh/mile = 1000 W/mile

Explanation: Since 1 kilowatt equals 1000 watts, multiplying kWh/mile by 1000 converts it to W/mile.

3. Importance of Energy Efficiency Measurement

Details: Measuring energy efficiency in W/mile helps compare electric vehicles, estimate range, and calculate charging costs. Lower W/mile 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 (0.2-0.3 kWh/mile). Larger vehicles may be 350-450 W/mile.

Q2: How does W/mile relate to MPGe?
A: MPGe (miles per gallon equivalent) is another efficiency metric. Lower W/mile values correspond to higher MPGe.

Q3: Why use W/mile instead of kWh/mile?
A: W/mile provides more granular measurement (especially for partial miles) and aligns with power units used in electrical engineering.

Q4: Does speed affect W/mile?
A: Yes, W/mile typically increases at higher speeds due to greater air resistance.

Q5: How can I improve my EV's W/mile?
A: Drive at moderate speeds, minimize rapid acceleration, use regenerative braking, and reduce excess weight.