Real-world efficiency data
Tesla Range Estimator
Based on real-world fleet efficiency data — not EPA lab results. Enter your conditions and battery degradation to see what you'll actually get on a cold UK morning, a motorway run, or a summer holiday.
Quick scenarios
Your Tesla
Driving conditions
Estimated range
≈ 260 Wh/mi · 75 kWh baseline assumed
Range impact by factor
Baseline ≈ 260 Wh/mi real-world efficiency. Typical real-world estimates from third-party fleet & benchmark data — not official Tesla or lab figures. Results vary with driving style, tyres and conditions.
Cold weather in the UK
At 0°C, expect 15–20% less range from battery chemistry alone. With the heater on, add another 10–20%. Real losses in a UK January can reach 35–40%. Teslas with heat pumps (Model 3/Y from late 2020) handle cold significantly better than older resistive-only heaters.
Speed is the biggest drain
Aerodynamic drag increases with the square of speed — going from 60 to 70 mph uses roughly 20% more energy per mile. On a UK motorway at 70 mph you'll see around 94% of the 65 mph baseline. Push to 80–85 mph and that drops to 75–81%. Cruise control at 60–65 mph is the sweet spot.
Battery degradation
Tesla batteries typically lose 10–15% capacity after 5 years and 150,000+ miles. LFP packs (Model 3/Y RWD) degrade less than NCA/NMC. You can find your car's current degradation via the TeslaBatteryCheck tool or by checking rated vs. actual range in your Tesla app.
Don't know? Check yours →About these estimates
Wh/mi efficiency figures are derived from TeslaFi fleet telemetry (200M+ miles), Recurrent Auto fleet data, and Bjørn Nyland benchmark tests. They reflect typical real-world driving at 65 mph — not EPA lab conditions. Individual results vary with driving style, tyre pressure, and road conditions.