// multi-utility computation suite · offline · instant · precise
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auto.ev-range-calculator Calculator
Estimates real-world EV range accounting for ambient temperature effects on battery chemistry and HVAC load, showing how much range is lost versus EPA-rated figures in cold or hot weather. Critical for winter trip planning when range anxiety is most acute.
Inputs
Battery Kwh
Maximum throughput or storage. Operating near 100% capacity typically increases failures and wait times.
Efficiency Mpkwh
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Temp F
Reference formula or conversion factor shown for context.
Hvac Kw
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.
Results
estimated range (miles)
The difference between the maximum and minimum values.
usable battery
The value at the specified point or condition.
temp efficiency factor
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
EPA range (100%)
The difference between the maximum and minimum values.
range with HVAC
The difference between the maximum and minimum values.
tip
Gratuity amount — the suggested amount to add to the bill as a service tip.