Tables you can cite, download and reuse

Calculator pages answer one question; these tables let you see the whole space at once: compare species across our species gestation period reference charts, verify genetic models with our Hardy-Weinberg equilibrium calculator, cross-reference clinical thresholds in our canine toxicity assessment tools, or take the raw numbers into your own spreadsheet. Every table follows our strict editorial review standards, cited directly to peer-reviewed veterinary and biological literature.

• Gestation periods by species: average and normal range

  Average gestation and normal window for dogs, cats, cattle with breed variants, goats, sheep, pigs, rabbits, horses and guinea pigs.

• Hardy-Weinberg worked answers: p, q and expected genotypes

  Six allele-frequency scenarios with p, q and the expected genotype frequencies p², 2pq and q², each read in plain language.

• Toxic doses quick reference for dogs and cats

  The toxic doses this site publishes for dogs and cats: chocolate bands, allium range, grape and raisin references, and emergency numbers.

• Tree spacing and planting density by use

  Trees per acre and hectare from row and in-row gaps, plus the pattern and stocking rules published by the tree spacing calculator.

Looking for the tool rather than the table? Every reference page links to the calculators that use it.