Biology Calculators
Professional tools for Biology Calculators
Our Biology Calculators collection covers everything from health and fitness to genetics, microbiology, ecology, and biochemistry. Whether you need to calculate your BMI, solve a Punnett square, figure out bacterial growth rates, or understand population genetics, our 85 free biology calculators are here to help with complete step-by-step solutions!
Chi-Square Calculator — Goodness of Fit, Test of Independence & Critical Values
Free chi-square calculator — run goodness of fit tests and tests of independence with full (O−E)²/E working tables, p-values, critical values, and Cramér's V effect size. Supports contingency tables up to 6×6
Use Calculator →Hardy-Weinberg Calculator — Allele & Genotype Frequency Solver with Steps
Free Hardy-Weinberg calculator. Solve p, q, p², 2pq, q² from any known value — recessive phenotype frequency, allele frequency, or observed counts — with complete step-by-step working. Includes genotype frequency calculator, allele frequency calculator, and phenotype frequency calculator
Use Calculator →Punnett Square Calculator – Free Generator for Mono, Di, Tri & Quadhybrid Crosses
Free Punnett square calculator and generator. Create 2×2 monohybrid, 4×4 dihybrid, 8×8 trihybrid, and 16×16 quadhybrid crosses instantly. Includes ABO blood type, X-linked, and special cross modes with step-by-step results
Use Calculator →DNA Molecular Weight Calculator – MW, Concentration, A260/280 Purity & Base Counter
Free DNA molecular weight calculator compute MW from sequence or length, convert between ng/µL, nM, and pmol, calculate DNA concentration and purity from A260/A280 spectrophotometer readings. Supports dsDNA, ssDNA, and RNA
Use Calculator →Reverse Complement Calculator – DNA & RNA Sequence Tool
Free reverse complement calculator for DNA and RNA sequences. Find the complement, reverse, and reverse complement instantly. Supports IUPAC ambiguity codes, FASTA input, GC content, palindrome detection, and DNA-to-mRNA transcription
Use Calculator →How Big Will My Puppy Get: Dog Size and Weight Calculator
Predict your puppy's adult weight and size category based on breed, current weight, and age
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Free chemistry, physics, biology & math calculators with step-by-step solutions. Trusted by 100,000+ students. Solve any science problem instantly!
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