MechCalc — Free white-box engineering & fitness-for-service calculators

Free white-box online calculators for fitness-for-service & engineering critical assessment — BS 7910 fracture, fatigue & residual stress, ASME, API 579, KTA. Every step and clause shown, no signup.

Standards covered: VDI 2230 (bolted joints), BS 7910 (fracture, fatigue, residual stress), API 579, ASME, KTA.

Bolted joints to VDI 2230

1. VDI 2230-2 Multi-bolt Joint Calculation (Rigid-body Method) v0.1 Beta · 2026-10-06
2. VDI 2230-1 Single-bolt Joint Calculation v0.1 Beta · 2026-10-06

Most used calculators

• Clause 7: Fracture Assessment Calculator Alpha · 2026-07-05
• Part 9: Fracture Assessment (Level 2) Alpha · 2026-06-22
• Annex M: SIF Alpha · 2026-06-24
• Material Query

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