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Calculators/Everyday/Pets

Pets calculators

Sizing, feeding and age-conversion maths for the animals in your household, from crate size and litter use to daily calories and hay by the bale.

Dog age in human yearsA dog's age converted to a human-equivalent age using the epigenetic-clock formula.Cat age in human yearsA cat's age converted to an equivalent human age using the standard veterinary chart.Pet gestation & due dateExpected birth date range for a common pet or farm animal, from the breeding date.Dog & cat daily caloriesDaily energy needs from resting energy requirement and an activity factor.Dog daily water intakeRoughly how much water a dog needs per day, by activity level.Dog crate sizeMinimum crate dimensions so a dog can stand, turn around and lie stretched out.Turtle tank sizeMinimum water volume for a pet turtle based on shell length.Chicken coop & run sizeMinimum floor space for a flock, depending on how much outdoor access they get.Dog chocolate toxicity riskTheobromine dose from chocolate eaten, checked against published toxicity thresholds.Rabbit cage sizeMinimum enclosure dimensions based on a measured hop, body length and standing height.Dog daily food amountDaily feeding amount as a percentage of body weight, by life stage.Cost of owning a petFirst-year and ongoing costs from your own monthly and one-off figures.Guinea pig & hamster ageHuman-equivalent age for a guinea pig or hamster from published veterinary age charts.Fish tank stockingRoughly how many inches of fish a freshwater community tank can hold.Pet bird ageHuman-equivalent age for a pet bird, scaled by its species’ typical lifespan.Horse weight estimateEstimated adult horse body weight from a heart-girth and body-length tape measurement.Round pen panel countFence panels needed to build a round training pen from its diameter and panel length.Cat litter plannerHow much litter a household gets through in a month, from tray size, depth and how often it is changed, with the bags and the cost.Horse hay requirementDaily hay for a horse as a percentage of bodyweight, adjusted for dry matter and pasture, with bales and cost for a planning period.Dog harness sizeRecommended harness size from chest girth, the measurement harnesses are actually fitted to.Dog heat cycle predictorEstimated stage dates and next heat window from the last cycle's start date.Fish weight estimateEstimated live weight of a fish from its length and girth, without using a scale.

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