Passage & PDL Calculator
Track Population Doubling Level (PDL) and cumulative cell doublings across passages. localStorage history management.
THIS PASSAGE PDL
—CUMULATIVE PDL
—FORMULA
PDL = log₂(Nf / Ni) = 3.322 × log₁₀(Nf / Ni)
Nf = final cell count, Ni = initial seeded count. Cumulative PDL = Σ of all passage PDLs. Hayflick limit ~50–70 PDL for human fibroblasts.