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Drone Thrust-to-Weight Calculator

Check the thrust-to-weight ratio of a multirotor from total or per-motor thrust.

Thrust & Weight

Result

Thrust-to-weight ratio
6.00: 1
4,800.00 gf vs 800.00 gf

Reference figure — static bench thrust is not full-flight thrust.

Formula

  1. 1.Ratio = Total Thrust / Takeoff Weight
  2. 2.Total Thrust = Thrust per motor × Motor count

Worked example

  1. 1.Inputs: 1200 gf × 4, 800 gf AUW.
  2. 2.Ratio = 4800 / 800 = 6.0.

Assumptions and limits

  • Do not treat static thrust as in-flight thrust.
  • Prop wash, voltage and flight mode change the real figure.

Related tools

FAQ

Is 2:1 enough to fly?

Yes for cruising, but freestyle/racing typically wants 4–8:1.

Assumptions

  • Per-motor mode assumes identical thrust on every motor.
  • Same force unit on both sides (gf).