EV Range Calculator
Estimate how far an electric vehicle can drive from its usable battery capacity and its energy consumption. Enter the pack size in kWh and the consumption in kWh per 100 km, and optionally a state-of-charge window to model a partial charge rather than a full pack.
Enter Values
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How to use this calculator
- Enter the usable battery capacity in kWh (the energy you can actually use, which is a little less than the pack's nameplate size).
- Enter the energy consumption in kWh per 100 km — around 15–20 for most passenger EVs, higher for large SUVs, utes and towing.
- Optionally set a start and end state-of-charge (default 100% down to 0%) to see the range for a partial charge, then read off the driving range in km.
How it works
Energy available = battery capacity × (start state-of-charge − end state-of-charge) / 100. Driving range = energy available / consumption × 100, because consumption is quoted per 100 km. With a 60 kWh usable pack at 18 kWh/100km, a full 100%→0% run gives 60 / 18 × 100 = 333 km; an 80%→20% window uses 36 kWh and covers 200 km.
Worked example
Worked example. A 60 kWh EV consuming 18 kWh/100km, charged to 100% and driven to 0%, has an estimated range of 60 / 18 × 100 = 333.33 km. Using only the 80%→20% band you have 36 kWh available and about 200 km of range.
Common mistakes
- Using the pack's nameplate capacity instead of the usable capacity — manufacturers hold back a buffer, so usable kWh is what determines range.
- Assuming a single consumption figure — highway speeds, heating/cooling, hills, load and cold weather can push real consumption well above the rated number.
- Planning to run the battery to 0% — always keep a reserve, and remember DC fast charging slows down markedly above about 80%.
Frequently asked questions
Why is my real range lower than this estimate?
The calculator assumes a steady consumption figure. In practice speed, climate control, terrain, headwind, load, tyre pressure and battery temperature all raise consumption, and a cold pack delivers less usable energy — so real range is often 10–30% below the nominal number.
What consumption figure should I use?
Check your car's trip computer for its average kWh/100km. As a guide, small EVs sit around 14–16, mid-size 16–19, and large SUVs, utes or anything towing 20–30+.
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Tip: Enter any known values to calculate the remaining results.
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