How do I know the current draw?
You can estimate it based on motor thrust data sheets (e.g., amps at hover thrust) or measure it with a power meter.
Calculator
Enter your values
Analysis
Interpretation of the current calculator output
Enter values to see detailed analysis and insights.
How to Use
Step-by-step instructions
- 1Enter the battery capacity (mAh).
- 2Enter the average current draw (Amps) at hover/cruise.
- 3The calculator will estimate the safe flight time.
Flight Duration
Calculates flight time by dividing battery capacity by average current draw, applying an 80% discharge limit for safety.
Time = (Capacity / Current) × 0.8Variables:
CapacityBattery capacity in mAhCurrentAverage draw in Amps0.8Safe discharge factorExample
Quadcopter
Inputs:
Capacity:5000 mAh
Current:20 A
Steps:
- 1.Capacity = 5 Ah
- 2.Total Time = 5 / 20 = 0.25 hours = 15 mins
- 3.Safe Time = 15 * 0.8 = 12 mins
Result:
12 Minutes