Enter your Initial Population Size (l0), Number of Age Intervals, and Age-Specific Survival Rates into the Life Table Calculator, then choose your Calculation Method to find Life Expectancy alongside Total Deaths, Mean Survival Rate, and Mean Mortality Rate across the full population cohort.
Life Expectancy
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Total Deaths
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Mean Survival Rate
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Mean Mortality Rate
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A life table is a demographic tool that shows the probability of death and survival at each age for a population. It's essential for understanding population dynamics, insurance calculations, and conservation biology studies.
lx represents the number of individuals surviving to age x from an initial cohort. It shows how the population size decreases with age due to mortality.
The mortality rate qx is the probability that an individual of age x will die before reaching age x+1. Values range from 0 (no mortality) to 1 (100% mortality).
Survival rate is the probability of surviving from one age to the next, while mortality rate is the probability of dying. They are complementary: survival rate = 1 - mortality rate.
Life expectancy is calculated by summing the total years lived by the population and dividing by the initial population size. It represents the average lifespan of individuals in the cohort.
Yes, life tables are commonly used in ecology and wildlife management to study animal population dynamics, breeding programs, and conservation efforts.
You can enter mortality rates and select 'Based on Mortality Rates' as your calculation method. The calculator will automatically convert these to survival rates for the analysis.