𦬠Biology
Biology calculators cover the quantitative side of genetics and molecular biology: allele and genotype frequencies, Hardy-Weinberg equilibrium, DNA base statistics and molecular weight, and related population genetics measures. Formulas follow standard textbook conventions, and worked examples walk through real data so you can verify the arithmetic. The pages explain the assumptions behind each model, because population genetics results depend on them, and they note where a real population will deviate from the ideal. Sources are named for the standard formulas. The tools are for study and analysis, not for clinical or safety-critical decisions, and they run entirely in your browser. The biology pages note the model assumptions, such as random mating and no selection, and explain what a deviation from equilibrium would mean in practice.
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Hardy-Weinberg Equilibrium Calculator
Solve p² + 2pq + q² = 1 for any of p, q, p², 2pq, or q². Includes carrier-frequency and population-genetics examples.
Protein Molecular Weight Calculator
Calculate molecular weight from an amino acid sequence using average residue masses.
DNA Codon Calculator
Translate a DNA or mRNA sequence into its amino acid chain using the standard genetic code.
DNA Calculator
Five molecular-biology tools in one: molecular weight (ssDNA / dsDNA), melting temperature (Wallace & nearest-neighbour), GC %, reverse complement, and translation.
DNA Molecular Weight Calculator
Calculate ssDNA and dsDNA molecular weight from a sequence. Includes GC content, length, Wallace / Marmur Tm, and 260 nm absorbance conversion.
Allele Frequency Calculator
Compute allele frequencies (p, q), Hardy-Weinberg expected genotype counts, chi-square goodness-of-fit, heterozygosity, inbreeding coefficient F, and PIC from observed AA, Aa, aa counts.