Bolt Shear Capacity Calculator (IS 800)
Design shear strength of an ordinary bolt — single or double shear.
M16 grade 4.6 single shear ≈ 29 kN; grade 8.8 doubles it. The 0.78 thread factor is why detailers try to keep threads OUT of the shear plane on heavy joints.
Formula
Bolt Shear Capacity Calculator (IS 800) is a free bolt shear capacity for structural engineers, fabricators and site engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Bolt Shear Capacity Calculator (IS 800)
Design shear strength of an ordinary bolt — single or double shear. The calculation implements V_dsb = (f_ub/√3)·n·A_nb / 1.25 (IS 800:2007 cl. 10.3.3). M16 grade 4.6 single shear ≈ 29 kN; grade 8.8 doubles it. The 0.78 thread factor is why detailers try to keep threads OUT of the shear plane on heavy joints.
How to use Bolt Shear Capacity Calculator (IS 800)
- 1Enter Bolt diameter in mm.
- 2Enter Bolt grade f_ub in MPa (Grade 4.6 → 400 · 8.8 → 800).
- 3Enter Shear planes (Single shear 1 · double (cover plates both sides) 2).
- 4Enter Threads in shear plane? (1 yes (use net area) · 0 no).
- 5Read Design shear capacity instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Bolt Shear Capacity Calculator (IS 800)?
- ✓Implements the standard formula — V_dsb = (f_ub/√3)·n·A_nb / 1.25
- ✓Reference cited on-page: IS 800:2007 cl. 10.3.3
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Bolt Shear Capacity Calculator (IS 800) use?+
It computes V_dsb = (f_ub/√3)·n·A_nb / 1.25, per IS 800:2007 cl. 10.3.3. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
M16 grade 4.6 single shear ≈ 29 kN; grade 8.8 doubles it. The 0.78 thread factor is why detailers try to keep threads OUT of the shear plane on heavy joints.
Can I use this for real structural design?+
It implements the exact textbook/code formula cited below the result and is ideal for sizing, checking and learning. Final designs should be verified by a qualified engineer against the full code with all load cases.
Is the Bolt Shear Capacity Calculator (IS 800) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
Related Engineering tools
Reynolds Number Calculator
Compute Re from density, velocity, pipe diameter and viscosity — with instant laminar/turbulent classification.
● LiveLaminar vs Turbulent Flow Classifier
Classify hydraulic-oil or process-fluid flow regime from kinematic viscosity, line velocity and tube bore.
● LiveBernoulli Equation Solver
Solve downstream pressure between two points from velocities, elevations and fluid density (ideal, lossless).
● Live