Use Ecological Doubling Time when you need to compute the doubling time of a population growing exponentially. Enter Growth rate per capita using the definitions and units below so the result can be reproduced.

Growth rate per capita

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

The published tool contract uses this rule: Compute the doubling time of a population growing exponentially.

Doubling time

The calculated doubling time.

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

Retain the original Growth rate per capita values and their units alongside the result. Doubling Time (PDT) is useful when you instead need to calculate population doubling time as elapsed hours times ln(2), divided by ln(final count / initial count). Bleeding Time Category provides another view by helping you classify a bleeding time in minutes up to 30 as normal (<= 7), borderline (<= 15), or prolonged.

• Doubling Time (PDT)

  Calculate population doubling time as elapsed hours times ln(2), divided by ln(final count / initial count).

• Bleeding Time Category

  Classify a bleeding time in minutes up to 30 as normal (<= 7), borderline (<= 15), or prolonged.

• Clotting Time Category

  Flag whether a clotting time between 30 and 600 seconds falls inside the normal range of 90 to 180 seconds inclusive.