# Conditional Weibull Distribution - Survival Table

## Background:

Given that an item that has survived to an age of *current_age*, the cumulative probability of failure up to some *future_time* is given by:

where:

β is the Weibull distribution shape parameter

η is the Weibull distribution characteristic life

See this related tool for calculating expected mean and median life using the conditional Weibull distribution.

The inputs below are pre-filled with example data. Inputs #3 and #4 can either be a range (*start, end, step*) or a single value.
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Calculation Inputs: