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 Safety Factor: 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).