Kaplan–Meier Survival Calculator
Estimates the survival function from time-to-event data using the Kaplan–Meier product-limit method. Handles right-censored observations, reports the full life table with Greenwood confidence intervals, the median survival time, and draws the classic step curve.
Read the full guide to this tool
Results
Notes
- S(t) multiplies (1 − dᵢ/nᵢ) over all event times tᵢ ≤ t — censored subjects leave the risk set without forcing the curve down.
- Confidence intervals use Greenwood’s variance formula, clipped to [0, 1].
- The median survival is the first time the curve drops to 0.5 or below; with heavy censoring it may never be reached.
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