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Animal and pet calculators

Free dog age and cat age calculators that convert your pet's age into human years. Each page explains its method, inputs and limits.

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Dog age calculatorConvert your dog's age to human years with the 2020 DNA-methylation formula, and compare it with the old seven-year rule.UK dog raw diet calculatorUK dog raw diet calculator: work out how many grams of raw food a day your dog needs from its weight in kg and life stage, using AAHA energy guidelines.UK dog chocolate calculatorUK dog chocolate calculator: estimate the theobromine and caffeine dose in mg/kg from your dog's weight in kg and the grams of chocolate eaten. Not vet advice.Sheep gestation calculatorSheep gestation calculator: find the expected lambing date and window from the mating date, or work back from the lambing date you want to the mating date.Cat years calculatorCat years calculator: convert your cat's age to human years using International Cat Care's age chart, and compare it with the old seven-year rule.Cattle gestation calculatorCattle gestation calculator: find a cow's expected calving date from the service date, or work back from the date you want, with the 279 to 287 day window.UK cattle gestation calculatorUK cattle gestation calculator: find a cow's calving date from the date served by the bull or AI, or work back from the calving date you want.US cattle gestation calculatorUS cattle gestation calculator: find a cow's calving date from the breeding date, natural service or AI, or work back from the calving date you want.UK sheep gestation calculatorUK sheep gestation calculator: find the lambing date and window from the tupping date, or work back from the lambing date you want to when to put the ram in.US sheep gestation calculatorUS sheep gestation calculator: find the lambing date and window from the breeding date, or work back from the lambing date you want to the breeding date.US dog chocolate calculatorUS dog chocolate calculator: estimate the theobromine and caffeine dose in mg/kg from your dog's weight in lb and the ounces of chocolate eaten. Not vet advice.US dog raw diet calculatorUS dog raw diet calculator: work out how many ounces of raw food a day your dog needs from its weight in pounds and life stage, using AAHA energy guidelines.

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Animals & pets calculator inputs and methods

Choose the calculation that matches your question and the inputs you have. Each calculator in the animal and pet calculators collection explains its inputs, method and result limitations.

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