FBD Builder

Add the forces acting on a body, watch the free-body diagram draw itself, then resolve the components, find the resultant, and check equilibrium — instantly. Great for incline, pulley, tension, and concurrent-force problems.

🆓 Free interactive tool — build and resolve as many diagrams as you like · Balance … EP

① Set up the body (optional)

Mass of the body (kg) — for Newton's 2nd law, leave blank for pure statics

Angle convention: 0° points right (+x), measured counter-clockwise. So 90° is up, 180° is left, 270° (or −90°) is down.

② Add a force

Label

Magnitude (N)

Angle (°)

③ Free-body diagram

Add a force above to start your diagram

🧲

No forces yet. Add one above, or tap Load example to see a 3-force diagram.

📐 Results

Net force ΣFₓ

—

Net force ΣFᵧ

—

Resultant magnitude

—

Resultant direction

—

Component breakdown

Force	Magnitude (N)	Angle (°)	Fₓ (N)	Fᵧ (N)
Σ (net)	—	—	—	—