EV Trip Calculator | Robert Beier

State of charge

⚡ Charging stops

Charged

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Est. cost

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Saved vs Gas

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DCFC Time

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Gas Stops

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Time vs Gas

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Stops

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📲 Send route to your maps app

📝 Printable sheets

Trip log — your plan plus blank fields to record real numbers on the road (odometer & battery % at each stop, leg efficiency, trip totals, notes).
Co-driver cheat sheet — a simple, plain-language guide for anyone who doesn't usually fast-charge: where to stop, when, and exactly how to charge at each one. Print it or open it on a phone.

🎯 Self-tuning — log your actual result

After you drive it, enter the actual miles and kWh used. The model compares that to what it predicted for this car and nudges future estimates toward your real-world driving. Stored only in this browser.

Actual miles

Actual kWh used

How this estimate was built

Base efficiency ✓ from your sessions
Temperature adjustment ≈ EV temp curve, anchored to your data
Road-type adjustment ≈ physics estimate
Wind & weather ≈ forecast-based penalty
Self-tuning ✓ from your logged trips
Elevation ≈ physics (m·g·h, partial regen)
Effective efficiency
Usable battery

Base efficiency is straight from your data — the median mi/kWh across your real charging sessions, at the temperature they typically happened. The temperature adjustment uses a published EV range-vs-temperature curve, anchored to that number — your logged range estimates are too noisy to fit the cold-weather slope directly, so the magnitude is yours and the direction is the curve's. Road-type is a physics estimate (aero drag rises with speed²) — your logs don't record driving style. Wind & weather adds a forecast-based penalty on days with notable wind (extra aero drag) or rain/snow (wet-road rolling resistance, wipers and lights). Routing & geocoding via OpenStreetMap (Nominatim + OSRM) — an optional openrouteservice key adds quickest / most efficient / scenic alternatives; temperature, wind & precipitation via Open-Meteo. Estimates only — your mileage will vary.