Use Logistic Growth Value when you need to evaluate the logistic growth model at a given time. Enter Carrying capacity, Initial population, Growth rate per capita, and Time elapsed using the definitions and units below so the result can be reproduced.

Carrying capacity

A finite measured or assumed value greater than or equal to 5e-324.

Initial population

A finite measured or assumed value greater than or equal to 5e-324.

Growth rate per capita

A finite measured or assumed value greater than or equal to 5e-324, expressed in 1/time.

Time elapsed

A finite measured or assumed value greater than or equal to 0.

The published tool contract uses this rule: Evaluate the logistic growth model at a given time.

Population at time t

The calculated population at time t.

The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability.

Retain the original Carrying capacity, Initial population, Growth rate per capita, and Time elapsed values and their units alongside the result. Specific Growth Rate is useful when you instead need to calculate the specific growth rate in inverse hours from two counts. Crop Growth Rate provides another view by helping you compute crop growth rate in grams per square metre of ground per day as standing dry mass gain divided by ground area times elapsed days.

• Specific Growth Rate

  Calculate the specific growth rate in inverse hours from two counts.

• Crop Growth Rate

  Compute crop growth rate in grams per square metre of ground per day as standing dry mass gain divided by ground area times elapsed days.

• Exponential Growth

  Project a population with continuous exponential growth.