Category
Biology calculators
DNA, genetics, cell biology, and lab calculation tools for students and researchers.
Hardy-Weinberg Calculator
Calculate allele and genotype frequencies for a population in genetic equilibrium.
DNA GC Content Calculator
Calculate the percentage of guanine and cytosine bases in a DNA sequence.
Cell Doubling Time Calculator
Find the time required for a cell population to double in size.
Beer-Lambert Law Calculator
Calculate absorbance or concentration using the Beer-Lambert law.
Enzyme Kinetics Calculator
Calculate reaction velocity using the Michaelis-Menten equation.
Osmolarity Calculator
Estimate the osmolarity of a solution from solute concentration and dissociation.
Population Growth Calculator
Model exponential population growth over time in ecology.
Mendelian Genetics Calculator
Determine genotype and phenotype ratios for monohybrid crosses.
Allele Frequency Calculator
Calculate allele frequencies and heterozygosity from genotype counts.
PCR Efficiency Calculator
Calculate qPCR amplification efficiency from a standard curve slope.
Protein Molecular Weight Estimator
Estimate the molecular weight of a protein from its amino acid count.
Chi-Square Genetics Test Calculator
Test whether observed genetic counts fit an expected Mendelian ratio.
LOD Score Calculator
Estimate the logarithm of odds score used in genetic linkage analysis.
DNA Melting Temperature Calculator
Estimate DNA or oligo melting temperature for primers and short sequences.
PCR Primer Design Calculator
Check PCR primer length, GC content, Tm, 3' clamp, and annealing temperature.
Codon Usage Calculator
Paste a coding sequence to calculate codon frequency, per-thousand usage, amino acid counts, and GC3.
Cell Count / Hemocytometer Calculator
Calculate cells per mL, total cells, and live cell concentration from hemocytometer counts, dilution factor, chamber dimensions, volume, and viability.
Mitotic Index Calculator
Calculate overall and field-level mitotic index from mitotic cell counts and total cell counts across one or more microscope fields.
Cell Surface Area to Volume Calculator
Calculate surface area, volume, and SA:V for sphere, cube, cylinder, rectangular prism, or custom measurements.
Logistic Growth Model Calculator
Model logistic population growth with carrying capacity, K percentage, inflection point, and a time-series growth table.
Shannon Diversity Index Calculator
Calculate Shannon H', evenness, richness, effective species, and per-species contribution from abundance counts.
Simpson's Diversity Index Calculator
Calculate Simpson 1-D, dominance D, reciprocal index, richness, and species-level contribution from abundance counts.
Mark-Recapture Estimate Calculator
Estimate population size from mark-recapture data with Chapman estimate, Lincoln-Petersen estimate, standard error, and recapture rate.
Carrying Capacity Calculator
Estimate carrying capacity K from current population, growth rate, observed population change, and logistic growth assumptions.
pH Buffer Calculator
Calculate buffer pH, base/acid ratio, buffer range, and target pH recipe with the Henderson-Hasselbalch equation.
Protein Concentration (A280) Calculator
Calculate protein concentration from A280, extinction coefficient, path length, dilution factor, molecular weight, sample volume, and A260/A280 check.
Enzyme Activity Calculator
Calculate enzyme units, stock activity, and specific activity from product concentration, reaction volume, time, diluted enzyme volume, dilution factor, and original stock protein concentration.
Natural Selection Simulation Calculator
Simulate allele frequency change across generations from initial p and genotype fitness values for AA, Aa, and aa.
Genetic Drift Calculator
Estimate drift variance, allele frequency range, heterozygosity retention, fixation probability, and loss probability in a finite effective population.
Effective Population Size (Ne) Calculator
Calculate effective population size from breeding male and female counts.
Photosynthesis Rate Calculator
Calculate and normalize photosynthesis rate from oxygen production or carbon dioxide uptake.
Respiratory Quotient (RQ) Calculator
Calculate respiratory quotient from carbon dioxide output and oxygen uptake.
BMR Calculator
Estimate basal metabolic rate from age, height, weight, and sex.
VO2 Max Estimator
Estimate maximal oxygen uptake from fitness test measurements.