Batch Record Review

Batch Yield Reconciliation Calculator

Track input/output quantities across each manufacturing stage to calculate stage yields, cumulative yield, and flag results outside your approved reconciliation range.

Why Yield Reconciliation Matters

Yield reconciliation compares the actual quantity of material obtained at each stage (and overall) against the theoretical quantity expected, based on the input material and formula. It's a GMP requirement (21 CFR 211.182, 211.188) used to detect material loss, mislabeling, or process deviations that might otherwise go unnoticed.

% Stage Yield = (Actual Output / Theoretical Output) × 100 % Overall Yield = (Final Actual Output / Original Theoretical Input) × 100

Typical Practice

Consideration	Practice
Reconciliation range	Defined per product/process in the Master Batch Record — commonly a range such as 95–105%, but always product-specific
Out-of-range yield	Requires investigation before batch disposition, regardless of whether yield is high or low
Stage-by-stage tracking	Helps pinpoint exactly where unexpected loss or gain occurred, rather than only reconciling at the end

Interactive Calculator

Lower Acceptable Yield (%)

Upper Acceptable Yield (%)

Stage	Theoretical Output	Actual Output	Stage Yield %

Original Theoretical (Stage 1)

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Final Actual Output

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Overall Yield %

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This tool illustrates the reconciliation calculation for educational and preliminary review purposes. Final batch disposition must follow your approved Master Batch Record reconciliation limits and deviation/investigation procedures — never rely on this calculator alone for release decisions.

Recommended Reading

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The ASQ Certified Pharmaceutical GMP Professional Handbook, 3rd Ed. Mark Allen Durivage (ed.) — covers batch record review, reconciliation, and GMP documentation requirements across the full manufacturing lifecycle.	View on Amazon →
Statistical Process Control for the FDA-Regulated Industry Manuel E. Peña-Rodríguez — useful for trending yield data across batches to catch drift before it becomes a reconciliation failure.	View on Amazon →

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