Biology Calculators

Calculate cell doubling time and growth rate from two measurements taken at known time points. Built for cell culture, microbiology, and cancer research.

Use the logistic growth model to find carrying capacity, population size, intrinsic growth rate, or rate of change. Enter any three values and read the fourth.

Predict how fast a bacterial population grows from either a growth rate or a doubling time. Useful for lab planning, food safety estimates, and infection modeling.

Calculate chocolate toxicity in dogs based on weight, chocolate type, and amount eaten. Get instant methylxanthine dose levels and severity assessment.

Calculate temperature by counting cricket chirps using Dolbear's law. Free cricket chirp thermometer for field and snowy tree crickets with scientific accuracy.