Gas Strut Calculator

Find the right gas spring force for lids, hatches, and tool-box covers — no more guessing.

Uniform lid: usually half the lid length.
Where the strut attaches to the lid.
Angle between lid and strut. 90° = strongest.
Moment balance
Each strut must hold its share of the lid’s turning moment:
F = (W × Lcg) ÷ (N × Lm × sin θ)

Pick a strut rated near this force. A slightly stronger one keeps the lid open with a light push to close.

🔧 Moment math

Balances lid weight against strut geometry.

🧪 Real-world sizing

Add-on loads via adjustable safety factor.

🔄 Angle aware

Accounts for weaker mounting angles.

📐 N and kgf

Ratings shown in both units.

More workshop tools

Build, measure, and fit it right.

Bolt Torque → Speaker Box Compression Spring

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