EV Road Trip Range Checker

First, it scales your vehicle’s baseline range by your starting state of charge. Then it applies condition factors—temperature (cold/mild/hot), route complexity (flat/mixed/hilly), and speed (extra penalty at higher speeds). It computes Margin = Adjusted Range − Trip Distance; if the margin is negative, it distributes the shortfall across the charging stops you indicate to produce target state-of-charge (SOC) levels at each stop.

Cold weather and hilly routes stack risk, because the calculator compounds range penalties instead of averaging them out. High average speeds can reduce efficiency enough that a trip that “should be fine” becomes borderline without an extra stop or a slower pace. The model also simplifies charging behavior—battery taper and exact charger power aren’t timed precisely—so treat the plan as a planning guide, then verify with real station availability and typical charge rates.

If you enter 0 charging stops and the margin is negative, the tool will mark the trip as not feasible rather than guessing where charging might exist. If starting SOC is very low (but still within 0–100), the calculator will likely require multiple stops and may flag feasibility issues when stop availability is limited. Extremely high trip distances relative to baseline range will quickly trigger a “not feasible as entered” verdict when the required stop density exceeds practical spacing.

Wind, traffic delays, payload, tire pressure, and HVAC usage are not modeled explicitly, even though they can materially affect range. Charging station reliability and the likelihood that a charger is available are also not guaranteed—your plan assumes stops are usable if you include them. If conditions are cold and the route is hilly, consider increasing your buffer (or adding an extra stop) because real-world variability is higher.