# kWh/100 km to Miles per kWh Converter > Convert kilowatt-hours per 100 kilometers to miles per kilowatt-hour for electric vehicle efficiency comparison **Category:** Conversion **Keywords:** kwh per 100 km, miles per kwh, ev efficiency, electric vehicle, metric to imperial **URL:** https://complete.tools/kwh-100-km-to-miles-per-kwh-converter ## How it works The conversion uses a straightforward mathematical relationship based on the fact that 100 kilometers equals 62.1371 miles. The core formula is: miles per kWh = 62.1371 / kWh per 100 km This can be derived step by step. First, convert kWh/100 km to km/kWh by dividing 100 by the input value. Then convert km/kWh to mi/kWh by dividing by 1.609344, the number of kilometers in a mile. Combining these steps yields 100 / (kWh per 100 km) / 1.609344, which simplifies to 62.1371 / kWh per 100 km. The tool also calculates related units. Kilometers per kWh is simply 100 divided by the input. kWh per 100 miles is the input multiplied by 1.609344. MPGe is calculated by multiplying mi/kWh by 33.705, the EPA-defined energy content of one gallon of gasoline in kWh. Watt-hours per mile is 1000 divided by mi/kWh. All results are rounded to five decimal places internally for precision. ## Who should use this 1. Electric vehicle buyers comparing models sold in different markets, where European specifications use kWh/100 km and North American specs use mi/kWh or MPGe. 2. EV owners tracking their real-world energy consumption who want to convert between metric and imperial efficiency units. 3. Fleet managers operating electric vehicles across international borders who need to standardize efficiency reporting. 4. Automotive journalists and reviewers comparing EV efficiency data from different testing standards such as WLTP and EPA. 5. Energy analysts and transportation planners evaluating the efficiency of electric vehicles for policy modeling and infrastructure planning. 6. Road trip planners who need to estimate range in miles from European-spec energy consumption figures. ## Worked examples Example 1: A Tesla Model 3 is rated at 15.5 kWh/100 km. Applying the formula: mi/kWh = 62.1371 / 15.5 = 4.01 mi/kWh. This means for every kilowatt-hour of energy, the car can travel approximately 4 miles. With a 60 kWh battery, the estimated range is 4.01 x 60 = 240.6 miles. Example 2: A BMW iX is rated at 21.0 kWh/100 km. Using the formula: mi/kWh = 62.1371 / 21.0 = 2.96 mi/kWh. The MPGe equivalent is 2.96 x 33.705 = 99.7 MPGe. The watt-hours per mile figure is 1000 / 2.96 = 337.8 Wh/mi. Example 3: A Hyundai Ioniq 6 achieves 14.8 kWh/100 km, one of the best figures in its class. Converting: mi/kWh = 62.1371 / 14.8 = 4.20 mi/kWh. The km/kWh figure is 100 / 14.8 = 6.76 km/kWh. The kWh per 100 miles is 14.8 x 1.609344 = 23.82 kWh/100 mi. Example 4: A less efficient electric SUV consumes 28.0 kWh/100 km. Converting: mi/kWh = 62.1371 / 28.0 = 2.22 mi/kWh. This translates to 74.8 MPGe and 450.5 Wh/mi. With a 75 kWh battery, the estimated range is only about 166 miles. ## Limitations 1. Rated vs. real-world efficiency: Manufacturer-rated kWh/100 km figures come from standardized test cycles (WLTP, EPA, NEDC) and may not reflect actual driving conditions. Real-world consumption can differ by 15-30% depending on driving style. 2. Temperature sensitivity: EV efficiency drops significantly in cold weather. A car rated at 15 kWh/100 km might consume 20-25 kWh/100 km in sub-freezing temperatures due to battery heating and cabin climate control. 3. Speed dependence: The conversion assumes a static efficiency value, but energy consumption increases non-linearly with speed. Highway driving at 75 mph can use 30-50% more energy than city driving at 30 mph. 4. Battery degradation: As EV batteries age, their capacity and efficiency decrease. A three-year-old battery may deliver 5-10% less range than when new, which is not captured in rated figures. 5. Altitude and terrain: Hilly terrain increases consumption significantly, while regenerative braking on descents can partially offset the cost of climbs. Flat terrain consumption will differ from mountainous routes. 6. Precision: The conversion constant 62.1371 is rounded from the exact value of 100/1.609344 = 62.13711922..., which introduces negligible rounding at the fifth decimal place. ## FAQs **Q:** Why is kWh/100 km used in Europe instead of mi/kWh? **A:** European countries use the metric system, and kWh/100 km follows the same pattern as the traditional fuel consumption metric L/100 km. It measures energy consumed per fixed distance, which is intuitive for comparing vehicles directly. Lower numbers mean better efficiency. **Q:** What is a good kWh/100 km value for an electric vehicle? **A:** Generally, below 15 kWh/100 km is considered excellent, 15-17 is very good, 17-20 is good, 20-25 is average, and above 25 is poor. Compact sedans like the Hyundai Ioniq 6 achieve figures around 14-15, while large SUVs may exceed 25 kWh/100 km. **Q:** How does MPGe relate to mi/kWh? **A:** MPGe (miles per gallon equivalent) is an EPA-defined metric where one gallon of gasoline is equated to 33.705 kWh of electrical energy. To get MPGe, multiply mi/kWh by 33.705. A car getting 4 mi/kWh achieves about 134.8 MPGe. **Q:** Why do WLTP and EPA ratings differ? **A:** WLTP (Worldwide Harmonised Light Vehicles Test Procedure) and EPA use different test cycles with different speeds, acceleration patterns, and ambient conditions. EPA ratings tend to be more conservative, typically showing 10-20% lower range than WLTP for the same vehicle. **Q:** Can I use this converter for plug-in hybrids? **A:** Yes, but only for the electric-only driving portion. Plug-in hybrids have a rated electric consumption in kWh/100 km that applies when running on battery power alone. Once the battery is depleted and the combustion engine takes over, fuel consumption is measured in L/100 km or MPG instead. --- *Generated from [complete.tools/kwh-100-km-to-miles-per-kwh-converter](https://complete.tools/kwh-100-km-to-miles-per-kwh-converter)*