Calculateur de batterie et de portée du drone

The Drone Battery & Range Calculator estimates maximum safe flight time and effective range based on battery capacity (mAh), voltage (V), drone power draw (W), cruise speed (m/s), and headwind. Energy in watt-hours: capacity × voltage / 1000. Usable energy after typical 80% safe discharge: Wh × 0.8. Flight time minutes = usable Wh / power × 60. Safe flight time (with 30% reserve for return-to-home) = max time × 0.7. Range km = effective speed (cruise minus headwind) × safe flight time ÷ 60. Why 30% RTH reserve matters: when battery hits 30% remaining, most consumer drones (DJI, Autel) automatically trigger Return-to-Home. If you push past this without enough remaining capacity to make it back, drone lands wherever it runs out — often in water, traffic, or unreachable terrain. Lost drones from battery depletion are the #1 cause of consumer drone fatalities. Always plan flights assuming you need the RTH battery, especially over water, mountains, or unfamiliar terrain. Real-world ranges vary by drone class. DJI Mini 4 Pro (2453 mAh, 7.38V → 18 Wh): 34 min advertised, ~24 min safe, range ~10 km (in still air at 36 km/h). DJI Mavic 3 (5000 mAh, 15.4V → 77 Wh): 46 min advertised, ~32 min safe, range ~30 km. Autel EVO Lite+ (6175 mAh, 11.55V → 71 Wh): 40 min advertised, ~28 min safe. Manufacturer 'max flight time' assumes ideal conditions — perfect weather, no payload, smooth flight; reduce by 25–40% for real-world use. Wind effects: headwind reduces effective speed (and thus range) directly while increasing power consumption. A 15 m/s cruise drone facing 5 m/s headwind has 10 m/s effective forward speed AND draws ~20% more power. Tailwind increases range but creates risk on return leg. Crosswind doesn't change forward range but increases lateral drift consumption. Best practice: plan flights into the wind first, return downwind. Never fly out farther than you can return on remaining battery considering the prevailing wind.

PrimeCalcPro provides professional-grade tools trusted by businesses and academics.

1. 1Step 1 — Enter battery capacity (mAh) from drone specification or battery label
2. 2Step 2 — Enter battery voltage (typically 7.4V for small drones, 15.4V for mid-size, 22.2V for larger)
3. 3Step 3 — Enter average power draw (W) during cruise (DJI Mini ~30W, Mavic 3 ~95W)
4. 4Step 4 — Enter cruise speed (typical 10–18 m/s for consumer drones, 25+ for racing)
5. 5Step 5 — Enter headwind speed (estimate from local weather or ask drone hover-and-observe)
6. 6Step 6 — Calculator computes Wh = (C × V) / 1000, usable Wh = Wh × 0.8, flight time = Wh / P × 60
7. 7Step 7 — Applies 30% RTH reserve for safe flight time; computes range from effective speed × time

• !Trusting advertised max flight time — real-world is 25–40% less
• !Pushing past 30% RTH battery — leading cause of drone losses
• !Not factoring headwind into return leg — drone arrives home empty
• !Cold weather without warming batteries — sudden voltage drop can crash drone mid-flight
• !Hovering for photos consuming as much battery as moving flight