Vehicle Range Calculator

Calculate range from physics, speed, drag, and energy. Test reserve buffers, grade, losses, and accessories. Compare scenarios fast before planning charging stops or refueling.

Calculator inputs

Enter vehicle, environment, and efficiency assumptions. Results appear above this form after submission.

Engineering estimate
Choose the energy source used for the calculation.
Use kWh for electric vehicles or litres for fuel vehicles.
Keeps part of the battery or tank unavailable for planning.
Average moving speed used for energy per kilometre.
Enter positive for headwind and negative for tailwind.
Base vehicle mass without payload.
Passengers, luggage, cargo, or tools.
Typical passenger vehicles are often near 0.25 to 0.40.
The effective front-facing area of the vehicle body.
Higher values indicate more tyre and road losses.
Use negative values for downhill travel.
Lower at altitude and higher in cold dense air.
Includes HVAC, lighting, pumps, screens, and electronics.
Transmission, inverter, motor, or driveline efficiency.
Used only for fuel vehicles.
Typical gasoline is near 8.9 kWh/L.
Adds urban cycling losses beyond steady-state physics.
Applied only to electric vehicle traction losses.
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Example data table

These sample cases show how different vehicle types and assumptions can shift expected range. Use them as starting points for your own analysis.

Scenario Powertrain Capacity Average Speed Total Mass Typical Consumption Estimated Range
Compact commuter Electric 50 kWh 70 km/h 1550 kg 145 Wh/km 310 km
Electric family SUV Electric 82 kWh 95 km/h 2280 kg 205 Wh/km 360 km
Petrol sedan Fuel 55 L 90 km/h 1630 kg 6.9 L/100 km 640 km
Loaded delivery van Fuel 80 L 75 km/h 3120 kg 12.8 L/100 km 500 km

Formula used

1. Aerodynamic drag force: Fdrag = 0.5 × ρ × Cd × A × vair2

This force rises with the square of air speed, so high speed and headwind can sharply reduce range.

2. Rolling resistance force: Froll = Crr × m × g × cos(θ)

Tyre losses scale with vehicle mass and road contact characteristics.

3. Grade force: Fgrade = m × g × sin(θ)

Positive grade raises energy demand. Negative grade can reduce traction demand.

4. Wheel traction energy per kilometre: Ewheel = Ftractive ÷ 3600

This converts force in newtons into wheel energy in kWh per kilometre.

5. Source energy per kilometre: Esource = [Ewheel ÷ η] × (1 + stop-loss) + accessory energy

The calculator then applies drivetrain loss, fuel engine efficiency when required, and optional regenerative recovery for electric vehicles.

6. Range: Range = usable energy ÷ total source energy per kilometre

Usable energy equals battery or tank energy after subtracting the chosen reserve margin.

How to use this calculator

  1. Select the powertrain type first so the capacity field matches the correct unit.
  2. Enter battery size in kWh or fuel tank size in litres.
  3. Add a reserve percentage to protect charging, refueling, or safety margin planning.
  4. Set realistic speed, wind, mass, and payload values for the route you expect.
  5. Enter drag coefficient, frontal area, tyre resistance, and grade assumptions.
  6. Include accessory load for HVAC, lights, pumps, or refrigeration equipment.
  7. Adjust efficiency and stop-start losses to match urban or highway driving behavior.
  8. Press Calculate Range to show results above the form.
  9. Use the export buttons in the result panel to save CSV or PDF output.

Engineering note: This tool is best for comparative planning and scenario testing. Real-world range also depends on tyre pressure, road surface, temperature, traffic, battery condition, fuel quality, and control strategy.

FAQs

1. What makes this calculator advanced?

It combines drag, rolling resistance, grade force, reserve margin, accessory load, speed, wind, drivetrain losses, and regenerative recovery in one estimate.

2. Can I use it for both electric and fuel vehicles?

Yes. Choose electric for battery-based range or fuel for tank-based range. The formulas automatically switch the energy source model.

3. Why does speed reduce range so much?

Aerodynamic drag rises with the square of air speed. Higher speed usually becomes the dominant force, especially on highways or during headwinds.

4. What reserve percentage should I use?

Many drivers plan with 5% to 15% reserve. Commercial or remote operations may use larger margins for safety, weather, or infrastructure uncertainty.

5. Does payload matter for range?

Yes. Payload raises rolling resistance and grade force. Heavier vehicles usually need more energy per kilometre, especially on hills or stop-start routes.

6. How should I enter wind?

Use positive numbers for headwind and negative numbers for tailwind. The calculator adds this value to road speed when drag is estimated.

7. Is the result exact enough for trip guarantees?

No. It is a planning estimate, not a guarantee. Road condition, temperature, traffic, drivetrain health, and driver behavior can change actual range.

8. What is the best way to improve accuracy?

Use measured vehicle mass, real route speed, local air density, actual accessory load, and tested efficiency values from fleet logs or trip data.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.