Kaplan–Meier event-time estimator
Build a survival step table directly from right-censored synthetic times.
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Use 2–500 synthetic records. All observations start at time zero; event and censor at the same time are both in the risk set immediately before events. No delayed entry.
The starting values are hypothetical. Results update as you edit. Use aggregate or synthetic inputs only.
Calculation results
- Last estimated survival
- 0.26666667
- Median survival
- 4
- Time: at risk / events / survival
- 1: 5 / 1 / 0.800000 | 2: 4 / 0 / 0.800000 | 3: 3 / 1 / 0.533333 | 4: 2 / 1 / 0.266667 | 5: 1 / 0 / 0.266667
How to interpret the output
The product-limit estimate multiplies (1−events/at risk) at event times. Median survival is the first observed time with estimated survival ≤0.5; it may be unreached. Independent noninformative censoring is required. Competing events should not simply be treated as censoring when estimating event probability. No confidence bands are supplied.
Method referenceSource checked 2026-11-06. Read the reproducible calculator validation report.