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FPV · Build · Thrust-to-Weight Calculator

FPV Build Calculator

Work out the thrust-to-weight ratio (TWR) of your build interactively. Move the sliders and see immediately which flight category your setup falls into — from cinematic to racing.

⚙ Input values

All-up weight (AUW) 250 g

Total flight-ready weight including battery

Max. thrust per motor 180 g

From the manufacturer data (prop + KV + cell count)

Number of motors 4

Quad = 4, hexa = 6, octo = 8

Battery cells 2S

For reference display only

Thrust-to-weight ratio (TWR)

2.9:1

Freestyle-capable

Total thrust

720 g

Hover throttle

~35 %

Excess thrust

470 g

Category

Sport/freestyle

1:1
barely lifts 2:1
calm 4:1
Freestyle 8:1+
Race

What is TWR? The thrust-to-weight ratio tells you how many times the total thrust exceeds the flying weight. Below 2:1 flies sluggishly, 2–3:1 calm cinematic/beginner, 3–5:1 the ideal freestyle range, above 8:1 aggressive racing. For reference: the Flywoo Flylens 75 (2S whoop) sits at roughly 2.5–3:1 depending on the battery.