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math.kaplan-meier-survival Calculator
Estimates the Kaplan-Meier survival curve from time-to-event data with censored observations, computing survival probability at each event time. The Kaplan-Meier curve is the standard way to present time-to-event outcomes in clinical trials and reliability engineering.
Inputs
N At Risk
Reference formula or conversion factor shown for context.
Events T1
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Events T2
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Censored T1
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Censored T2
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Results
S(t₁) survival probability
Reference formula or conversion factor shown for context.
S(t₂) survival probability
Reference formula or conversion factor shown for context.
crude hazard estimate
The value at the specified point or condition.
Kaplan-Meier: S(t) = Π(1-d/n)
Sample size or count used in the calculation.
at risk at t₂
Overall risk level based on the computed score or classification. Higher risk may call for mitigating actions or additional review.
log-rank test
The position in an ordered list, from best to worst or lowest to highest.