Kaplan-Meier Survival
Calculate Kaplan-Meier Survival instantly with the exact formula and a worked example.
Kaplan-Meier Survival
Time 1: at risk
Time 1: events
Time 2: at risk
Time 2: events
Time 3: at risk
Time 3: events
Time 4: at risk
Time 4: events
Survival S(t)
80.37%
S after time 1
95%
S after time 2
90.78%
S after time 3
83.97%
Standard error (Greenwood)
4.17%
95% CI
72.19 – 88.55%
More about: Kaplan-Meier Survival
What it calculates
The “Kaplan-Meier Survival” calculator computes Survival S(t) in % from 8 parameters: time 1: at risk, time 1: events, time 2: at risk, time 2: events, time 3: at risk, time 3: events, time 4: at risk, time 4: events.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters Time 1: at risk = 100, Time 1: events = 5, Time 2: at risk = 90, Time 2: events = 4, Time 3: at risk = 80, Time 3: events = 6, Time 4: at risk = 70, Time 4: events = 3 the result is 80.37 % (Time points with zero at risk are skipped).
How to use
- Enter time 1: at risk, time 1: events, time 2: at risk, time 2: events, time 3: at risk, time 3: events, time 4: at risk and time 4: events — each field above is adjustable with a slider.
- Survival S(t) (%) is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Kaplan-Meier Survival calculated?
The Kaplan-Meier Survival calculator computes Survival S(t) (in %) from time 1: at risk, time 1: events, time 2: at risk, time 2: events, time 3: at risk, time 3: events, time 4: at risk, time 4: events. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Kaplan-Meier Survival calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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