Torque Hinge Calculator | Calculate Required N·m for Flap Covers

Industrial Torque Hinge Calculator

Side View: Torque = mg × L (moment arm). Maximum torque at 0° (horizontal position) for flap covers.

Opening Type –

Door / Cover Weight kg

Effective Length (L) mm

Number of Hinges pcs

Center of Gravity Position (from hinge) %

Safety Factor (1.0-2.0 recommended) –

⚠️ Side opening doors: Gravity does not generate torque around vertical hinge axis. Value shown is for damping reference only.

Required Torque per Hinge

0.00

N-m

Calculation based on center of gravity at specified position | Industrial standard mechanical model for torque hinges

1. Select the Opening Type: Choose “Top/Bottom Flap Cover” for horizontal flipping covers, or “Side Opening Door” for vertical axis doors.
2. Enter Door/Cover Weight: Total weight of the door/cover in kilograms (kg).
3. Enter Effective Length (L): Distance from hinge axis to the farthest edge of the cover/door in millimeters (mm).
4. Set Number of Hinges: Total number of hinges used to support the door/cover (minimum 1).
5. Adjust Center of Gravity Position: Percentage of effective length where the center of gravity is located (default 50% for uniform weight distribution).
6. Set Facteur de sécurité: Recommended 1.2 (1.0-2.0) to account for material tolerances and dynamic loads.
7. The calculator automatically computes the required torque per hinge in Newton-meters (N·m) in real-time.
⚠️ Note: For side opening doors, the result is for damping reference only (gravity does not create rotational torque around vertical axes).