Engineering Calculators
Standards-based calculations with step-by-step derivation, formula sources, and explicit applicability limits.
ISO · ASME · VDI Standards
Every calculation references a published international standard or peer-reviewed engineering textbook.
Source of Truth
Built on Published Standards
No rule-of-thumb values. Every formula, constant, and safety factor is traced to ISO, ASME, VDI, or DIN standards, or a peer-reviewed textbook (Shigley's, Roark's, Machinery's Handbook).
Explore libraryEvery Field of Mechanical Engineering
Calculators organized by discipline — from fasteners and structural analysis to fluid systems and manufacturing.
专为专业机械设计工程打造
Every output includes the equation used, the source standard, and the conditions under which the result is valid.
Equation Shown
Formulas, symbols, and unit conventions remain fully transparent.
Source Identified
Every method cites ISO, ASME, DIN, or Shigley textbook references.
Limits Stated
Applicability, simplifications, and safety margins are explicitly noted.
内部复核
每个经复核计算器均发布验证示例。
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