Sterility Assurance Level (SAL) Calculator
Sterility Assurance Level (SAL) Calculator
Survivor Curve Formula
log10(Nt) = log10(N0) − (F0 / D)- Nt: surviving microorganisms after sterilization
- N0: initial microbial population
- F0: equivalent lethal exposure time (minutes)
- D: decimal reduction time (minutes)
| F₀ (min) | N₀ | D (min) | Log Reductions (F₀/D) | Nt | Estimated SAL* | F₀ for SAL 10⁻⁶† |
|---|
*Estimated SAL shown as expected survivors per unit (approximation).
†F₀ required to reach SAL 10⁻⁶ with the given N₀ and D: D × (log₁₀(N₀) + 6).