EV Load & Passengers Range Calculator
Extra weight and rooftop drag quietly eat your range. See what a full family, a roof box or a trailer really costs you on every trip.
Roof box drag grows fast with speed.
Total extra weight
Adjusted range
Range loss
Main culprit
Load breakdown
How to minimize it
- Remove the roof box when not used. It's the biggest single loss.
- Pack heavy items low and inside. Less drag, better handling.
- Avoid towing if range matters. A trailer costs 30-50% range.
Frequently asked questions
How much range does carrying extra weight cost?
Each additional 100 kg of payload typically costs 3-5% range. A full family with luggage can easily mean 10-15% less range on a trip.
Do roof racks reduce EV range?
Yes, a lot — a roof box can cost 10-20% range at highway speed due to aerodynamics. Even an empty roof rack costs 5-10%. The effect is worse the faster you go.
Does a trailer really hurt EV range?
Towing a trailer can cut EV range by 30-50%, the biggest single range killer. Weight matters, but aerodynamics and rolling resistance dominate.
How do passengers affect range?
Each passenger adds ~75 kg of weight, costing roughly 0.3-0.5% range each. Four passengers total about 1.5-2% — noticeable but rarely decisive.