EV calculators
Charging time
Pick a model from the catalogue, set the charge window, and see how long the session actually takes at a given charging post's power.
%
The state of charge you start the session from.
%
The state of charge you end the session at.
Charging post power
The post's maximum rated power — the car never draws more than this, even where its own curve would allow it.
kW
Enter the station's real rating if it differs from the three typical values above — e.g. the power printed on a specific charger's spec sheet.
Result
Toyota bZ4X FWD 57.7 kWh (2025) · curve calibrated to the claimed window 150 kW, 10–80%, 28 min
- Charging time
- 26 min
- Energy delivered
- 32.4 kWh
- Average power
- 75.6 kW
- Range added
- 183 km
curve calibrated to the claimed window 150 kW, 10–80%, 28 min
- Car's own power curve
- Power delivered at this post
| State of charge | Car's power | Delivered power |
|---|---|---|
| 10% | 139 kW | 139 kW |
| 14% | 139 kW | 139 kW |
| 17% | 139 kW | 139 kW |
| 21% | 139 kW | 139 kW |
| 24% | 139 kW | 139 kW |
| 28% | 128 kW | 128 kW |
| 31% | 118 kW | 118 kW |
| 35% | 107 kW | 107 kW |
| 38% | 96 kW | 96 kW |
| 42% | 86 kW | 86 kW |
| 45% | 75 kW | 75 kW |
| 49% | 73 kW | 73 kW |
| 52% | 71 kW | 71 kW |
| 56% | 69 kW | 69 kW |
| 59% | 66 kW | 66 kW |
| 63% | 64 kW | 64 kW |
| 66% | 61 kW | 61 kW |
| 70% | 58 kW | 58 kW |
| 73% | 55 kW | 55 kW |
| 77% | 52 kW | 52 kW |
| 80% | 49 kW | 49 kW |
Charging time FAQ
- How does the calculator know the charging power curve?
- Once you pick a model from the EvCompass catalogue, its usable battery capacity and charging power curve fill in automatically — there is no spec to type in yourself.
- Why does the post I pick change the time so much?
- A post never delivers more power than its own rating, even when the car's curve would allow more at that moment. On a 50 kW post, a car capable of 150 kW still charges at a speed capped at 50 kW for the whole session.
- Is the power curve measured by the manufacturer?
- No. When the curve is calibrated, it means we shaped it to match ONE claimed figure from the manufacturer's own data (e.g. 85 kW, 0-80%, 35 min) — that is one data point, not a measured charging run. Where no such figure exists, the curve is entirely estimated from the car's specs instead. Neither one is a measurement.