Biology Calculators
Free online biology calculators for pregnancy tracking, metabolism, and more.
Pregnancy Due Date
Calculate estimated due date, gestational age, and milestones.
BMR Calculator
Calculate Basal Metabolic Rate using Mifflin-St Jeor.
Herd Immunity Threshold
Calculate vaccination coverage needed for herd immunity.
Drug Half-Life
Calculate elimination half-life and rate constant.
qPCR ΔΔCt
Relative gene expression using comparative Ct method.
Sensitivity & Specificity
Calculate diagnostic test performance metrics.
Relative Risk & OR
Calculate RR, OR, and attributable risk.
ELISA Titer
Calculate S/CO ratio and estimate antibody titer.
Hemocytometer Count
Cell concentration and viability from hemocytometer.
Seeding Density
Calculate cell suspension volume for plating.
FCR Calculator
Feed conversion ratio for aquaculture.
Water Quality Index
Calculate simplified water quality index.
Degree-Day (GDD)
Growing degree days for plant/insect development.
Incidence & Prevalence
Calculate disease prevalence and incidence rate.
Restriction Digest
Calculate enzyme volume for DNA digest.
Viral Titer (PFU/mL)
Calculate viral titer from plaque assay.
Creatinine Clearance
Cockcroft-Gault equation for renal function.
DO Saturation
Calculate dissolved oxygen saturation.
Pielou's Evenness
Calculate species evenness from Shannon diversity.
Salinity Converter
Convert conductivity to practical salinity.
Body Condition Index
Estimate body condition from weight and length.
Coral Calcification
Calculate coral calcification rate.
Pregnancy Due Date Calculator
Calculate estimated due date and current gestational age
Due Date
—
Gestational Age
—
Trimester
—
Days Until Due
—
—
—
—
—
BMR Calculator
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation
BMR (calories/day)
1,686
Sedentary
2,023
Light Exercise
2,319
Moderate Exercise
2,614
2,910
3,205