How does the Bolt Torque Calculator work?

Calculate: T = K × d × F where K is coefficient (0.15-0.2), d is diameter, F is clamp force Then: Or inverse: F = T / (K × d) Then: Standard torque specifications follow ASME or ISO standards.

Can you give an example of how to use the Bolt Torque Calculator?

Example: Input M20 bolt (d=20mm), desired clamp F=100 kN, K=0.17 gives a result of Torque ≈ 340 N·m required (Use calibrated wrench).

Is the Bolt Torque Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Bolt Torque Calculator?

Our Bolt Torque Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Bolt Torque Calculator

Applied Torque (in-lbs)

Bolt Diameter (in)

Bolt torque relates to clamp force, preventing loosening and joint slippage. Proper torque specification is critical for safety.

Symbol	Name	Unit	Description
T	K × d × F where K is coefficient (0	—	K × d × F where K is coefficient (0
K	K value	—	Variable used in the calculation
F	T / (K × d)	—	T / (K × d)

Difficulty:intermediate

References

›Bolt Torque — Wikipedia

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Bolt Torque Calculator

Bolt Torque Calculator

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Bolt Torque Calculator