About this Tesla Range Loss Calculator
Rated EV range is measured under controlled conditions. Real-world range can fall with cold weather, speed, battery degradation, accessories, and payload.
Who this calculator is for
- Tesla and EV drivers planning realistic trip range.
- Car shoppers comparing range assumptions.
- Drivers estimating cold-weather or highway range impact.
When to use it
- Estimate winter range from a rated range.
- Model battery degradation impact over time.
- Add speed, HVAC, and payload loss assumptions for trip planning.
How to use this calculator
- Enter rated range.
- Enter loss percentages for degradation, temperature, speed, accessories, and payload.
- Review estimated real-world range and total loss.
Key assumptions
- Loss factors are applied multiplicatively rather than simply added.
- The calculator does not use live vehicle telemetry or route data.
- Calculations run locally and are for planning only.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
Estimated range = Rated range x product of each remaining factor. For example, a 10% loss uses a 0.90 factor.
Estimated range = rated range * product of remaining factors, where each remaining factor is 1 - loss percent / 100.
Inputs explained
Rated range
EPA, WLTP, or displayed rated range used as the starting point.
Battery degradation
Estimated capacity loss from age and cycles.
Temperature and speed losses
Planning factors for cold weather, heat, highway speed, or headwind.
Understanding your results
The result is a planning estimate. Real range depends on route, elevation, tires, wind, HVAC, traffic, battery temperature, and driving style.
Example scenarios
Cold highway trip
330 rated miles with 8% degradation, 18% cold loss, 10% speed loss, and 5% accessory loss estimates about 224 miles.
Key Features
- Instant Calculation
- Private & Secure
- Mobile Optimized
Tips & Best Practices
- Use recent trip efficiency from the vehicle for more accurate planning.
- Cold starts, high speed, and headwinds can compound range loss.
- Keep a reserve buffer for charging arrival estimates.