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Quality Quick Calc
Unit conversion · PPM · FMEA priority · tolerance stack - everyday quality engineering calculations
Enter a value to convert automatically
Notes
· Linear units (length/pressure/force/torque/mass/roughness) are exact conversions
· Hardness uses empirical reference values (ref. GB/T 1172, ASTM E140); may deviate for different materials - estimate only
· Ra and Rz have no exact relationship; this tool does not convert between them
About Quality Quick Calculator
Quick quality formulas: Cpk-to-yield and ppm conversion, tolerance/σ relations, sampling-size estimation, percent-to-ppm conversion, with AI interpretation.
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