Genetics Calculators
Free genetics calculators. Instant results, no login required.
6 tools availableAllele Frequency Calculator
Calculate allele frequencies p and q from genotype counts, phenotype counts, or allele counts. Includes Hardy-Weinberg equilibrium check and chi-square test.
DNA Copy Number Calculator
Calculate DNA copy number from mass and fragment length, or from concentration and volume. Reverse-calculate mass needed for a target copy number. Uses 660 g/mol per bp for dsDNA.
Dihybrid Cross Calculator
Calculate offspring genotype and phenotype ratios for a two-gene cross using a 4x4 Punnett square. Shows the 9:3:3:1 ratio and all genotype frequencies.
Punnett Square Calculator
Predict offspring genotype and phenotype probabilities from a monohybrid or dihybrid cross using a Punnett square.
Trihybrid Cross Calculator
Calculate offspring genotype and phenotype ratios for a three-gene cross. Shows the 27:9:9:9:3:3:3:1 ratio and all 8 phenotype classes across 64 possible offspring.
qPCR Efficiency Calculator
Calculate qPCR efficiency from standard curve slope or raw Ct data. Supports serial dilution input, shows R², and flags MIQE 90-110% range compliance.