Calculadora de Drone (Motor)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
TWR = thrust / weight
About this calculator
The Drone Motor Calculator is an online tool that helps enthusiasts and professionals estimate the thrust-to-weight ratio (TWR) and approximate power per motor for a drone. TWR is calculated by dividing the total thrust generated by the motors by the total weight of the drone. This number is essential to determine if the drone will have adequate performance for flight, maneuvers, or additional payloads.
To use the calculator, you enter the total thrust (in grams or newtons) and the total weight of the drone (including battery, camera, etc.). The tool calculates TWR instantly. A TWR above 1 indicates the drone can climb vertically; values between 1.5 and 2 are common for stable flight; above 3 for acrobatics. The estimated power per motor is derived from thrust and typical propeller efficiency.
This calculator is useful when designing a custom drone, choosing motors and propellers, or checking if an existing model meets flight requirements. For example, for a racing drone, high TWR is crucial; for aerial photography, moderate TWR with better flight efficiency is preferred. It also helps avoid motor overload or insufficient performance.
Cautions: The calculator provides estimates based on ideal values. Actual thrust varies with battery voltage, altitude, temperature, and propeller efficiency. Always consult manufacturer specifications and perform practical tests. The estimated power is approximate; for accurate battery consumption calculations, consider actual motor current.
Frequently asked questions
What is TWR and what is the ideal value for a drone?
TWR is thrust-to-weight ratio. For stable flight, a TWR between 1.5 and 2 is recommended; for acrobatics, above 3.
How to measure drone motor thrust?
Thrust can be measured with a dynamometer or thrust stand, fixing the motor and measuring the force in grams or newtons.
Does the calculator consider propeller efficiency?
The calculator uses typical propeller efficiency to estimate power, but does not replace manufacturer-specific data.
Can I use this calculator for fixed-wing drones?
It is designed for multirotor drones. For fixed-wing, other parameters like stall speed are more relevant.
What does estimated power per motor mean?
It is the approximate electrical power each motor consumes to generate the given thrust, useful for sizing the battery.