Biology & Pets

Biology & pets calculators for animal age, dog pregnancy, dog weight, plant spacing, genetics, Punnett squares, and pet dosage estimates.

Bird Age Calculator

Use our Bird Age Calculator to convert bird years to human years or human age back to bird age by species or custom lifespan.

Plant Spacing Calculator

Use our Plant Spacing Calculator to estimate how many plants fit in a garden bed, crop row, or square-foot layout from area and spacing.

Hamster Age Calculator

Use our Hamster Age Calculator to convert hamster years to human years or human age back to hamster age with chart-based interpolation.

Dog Age Calculator

Convert dog years to human years by breed size. Get a clear age estimate for puppies, adults, and seniors.

Dihybrid Cross (Punnett Square) Calculator

Use our Dihybrid Cross Calculator to build a 4×4 Punnett square for two traits, see gametes, genotype probabilities, and phenotype ratios fast.

Dog Pregnancy (Due Date) Calculator

Use our Dog Pregnancy (Due Date) Calculator to estimate your dog’s due date, safe whelping window, and pregnancy progress from mating, ovulation, LH surge, or diestrus.

Dog Size & Adult Weight Calculator

Use our Dog Size & Adult Weight Calculator to estimate your puppy’s adult weight from age and current weight. Quick size prediction with pet category output.

Punnett Square Calculator

Punnett Square Calculator to predict genotype and phenotype ratios for monohybrid and dihybrid genetic crosses.

Percent Yield Calculator

Use our Percent Yield Calculator to calculate chemistry percent yield from actual yield and theoretical yield in mg, g, or kg.

Cat Age Calculator

Use our Cat Age Calculator to convert cat years to human years or human age to cat age with a chart-based estimate and step-by-step result.
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