A drone flight time calculator estimates how long your FPV or camera drone will stay airborne based on battery capacity, voltage, all-up weight, and motor count. It accounts for the 80% LiPo safe-discharge rule and shows separate estimates for hover, cruise, and sport flying modes. Essential for planning FPV freestyle, racing, and long-range missions.
Battery & Motors
Leave blank and click Auto-estimate to calculate from AUW
Flight Time Estimates
How to Use the Drone Flight Time Calculator
Knowing your drone's expected flight time before you fly helps you plan missions, avoid battery damage, and stay safe in the air. This drone flight time calculator estimates runtime from your battery and motor specifications, accounting for the 80% LiPo safe-discharge rule and different flying styles.
Step 1: Enter Battery Specifications
Start with your battery capacity in milliamp-hours (mAh). This is printed on every LiPo pack — common FPV sizes range from 450 mAh for micro whoop batteries to 6000 mAh for long-range 6S packs. Then select your cell count: 3S (11.1V), 4S (14.8V), 5S (18.5V), or 6S (22.2V). Higher cell counts deliver more voltage for the same capacity, meaning you can run lower-KV motors more efficiently.
Step 2: Set Motor Count and Weight
Select your motor count — 4 for a standard quadcopter, 6 for a hexacopter, or 8 for an octocopter. Then enter your all-up weight (AUW), which is the total flying weight including battery. You can switch between grams and ounces using the unit toggle. AUW is the most important factor in current draw: a heavier drone needs more thrust and draws more power from the battery.
Step 3: Set Current Draw Per Motor
If you know your motors' average current draw from manufacturer specs or previous flights, enter it directly. If not, click Auto-estimate to calculate from your all-up weight. The auto-estimate uses the formula: total hover power = AUW (g) × 1.5W/g, divided across motors and voltage. This gives a realistic hover current estimate for typical quad setups.
Step 4: Read the Results
The drone flight time calculator shows three flight mode estimates. Hover assumes steady 60% throttle, which is a common baseline. Cruise applies a 0.8× multiplier for efficient forward flight, which typically uses less power than hovering. Sport/racing uses a 2× multiplier to reflect aggressive high-throttle flying. The safe flight time is 80% of your hover time — the point at which you should land to protect your LiPo battery from damaging over-discharge.
Why the 80% LiPo Rule Matters
Lithium polymer batteries should not be discharged below about 3.5V per cell under load. Consistently draining below this threshold causes permanent capacity loss, cell imbalance, and in severe cases, puffing or fire risk. The 80% rule gives you a practical safety margin. Many pilots also set their flight controller's low-voltage alarm to warn them before hitting the cutoff.
Frequently Asked Questions
Is this drone flight time calculator free?
Yes, this drone flight time calculator is completely free. There are no usage limits, no account required, and no premium features. Enter your battery and motor specs and get instant estimates.
Is my data private when using this tool?
Absolutely. All calculations run entirely in your browser. No data is sent to any server or stored anywhere. Your drone specifications remain completely private on your device.
What is the 80% LiPo rule for drone flight?
The 80% rule means you should land your drone when the battery reaches 20% capacity remaining. Discharging a LiPo battery below 20% causes irreversible cell damage, reduced capacity, and can lead to battery swelling or failure. The safe flight time shown is 80% of the total estimated flight time.
How accurate are drone flight time estimates?
Estimates are good approximations but real-world flight times vary based on flying style, wind conditions, altitude, temperature, and battery age. Racing and freestyle flying draws much more current than gentle cruising. Use these numbers as a starting point and track your actual battery voltage carefully.
What is all-up weight (AUW) in drones?
All-up weight (AUW) is the total flying weight of your drone including the frame, motors, ESCs, flight controller, battery, camera, and any payload. It is the key factor in determining how much current your motors draw. Heavier drones need more thrust and draw more current, reducing flight time.
How do I estimate current draw per motor?
A rough rule of thumb: multiply the all-up weight in grams by 1.5 to get total system watts, then divide by the number of motors and battery voltage to get amps per motor during hover. The auto-estimate button uses this formula. For racing, multiply hover current by 2-3x for a worst-case estimate.
What is the difference between hover, cruise, and sport flight modes?
Hover flight uses approximately 60% throttle and is the baseline for this calculator. Cruise mode applies a 0.8x multiplier assuming efficient forward flight at moderate speed. Sport/racing mode applies a 2x multiplier reflecting high-throttle aggressive flying. Real mixed-style flying typically falls between hover and cruise.
Does battery voltage affect flight time?
Yes. Higher voltage (more cells) means your motors run at lower current for the same power output, which reduces heat loss and improves efficiency. A 6S setup typically runs more efficiently than a 4S setup for the same motor power, which can extend flight time slightly despite the heavier battery.