Dog calculators that show their working

Calculate how many calories your dog needs per day from body weight, life stage and activity level, using the standard RER and MER veterinary formulas.

Turn your daily calorie target into grams or cups of the food you actually buy. Pick from foods whose calorie figures we have checked against the manufacturer, or enter the kcal/kg from your own bag.

Estimate metabolizable energy in kcal per kilogram from a guaranteed analysis panel when the bag does not print a calorie content.

Compare what two dog foods actually cost to feed, by price per 1,000 kcal instead of price per bag.

Find your dog’s 10% treat allowance and how many of a given treat fit inside it without unbalancing the diet.

Calculate daily raw feeding amounts as a percentage of body weight, split into muscle meat, bone, organ and plant matter.

Scale a home-cooked dog food recipe to your dog’s daily calorie requirement and check the portion per meal.

Split one bag of food correctly between several dogs of different weights and activity levels, and see how long the bag lasts.

Build a day-by-day old-food to new-food mixing plan that avoids the digestive upset caused by switching too fast.

Estimate how much water your dog should drink each day, and the thresholds that suggest excessive thirst worth a vet visit.

Convert your dog’s age into human years using size-adjusted veterinary life-stage data instead of the inaccurate multiply-by-seven rule.

Estimate your dog’s target healthy weight from its current weight and body condition score.

Score your dog on the 9-point body condition scale from rib, waist and abdominal tuck checks you can do at home.

Plan a safe rate of weight loss for an overweight dog, with the daily calorie target and a realistic week-by-week timeline.

Predict how big your puppy will grow from its current age and weight, adjusted for expected breed size group.

Plot your puppy’s weight against the expected growth curve for its size group and check whether it is on track.

Find out whether your dog counts as senior yet, since the threshold shifts by several years between small and giant breeds.

Generate a dated core vaccination timeline from your puppy’s date of birth, including booster and rabies timing.

Build a deworming timeline for puppies and adult dogs based on age and risk level.

Work out when the next flea and tick dose is due, and when seasonal coverage should start and stop in your climate.

Estimate a whelping date from the breeding date, with the key gestation milestones along the way.

Predict the next season from your dog’s cycle history, with the fertile window highlighted.

Find out how dangerous the chocolate your dog ate is, by calculating the theobromine dose in mg per kg of body weight and the symptoms expected at that dose.

Check the risk from grapes or raisins by body weight. Any amount can be dangerous, and this shows where reported toxic doses begin.

Calculate the xylitol dose from gum, peanut butter or baked goods, and whether it reaches the hypoglycaemia or liver failure threshold.

Work out whether the amount of onion, garlic, leek or chive your dog ate reaches the dose that damages red blood cells.

Search a food and get a straight answer on whether it is safe for dogs, unsafe, or safe only in limited amounts.

Check whether it is too hot to walk your dog, including asphalt surface temperature and heatstroke risk at a given air temperature.

Find the right crate dimensions from your dog’s length and height at the shoulder, with the standard crate size that fits.

Measure for a collar that fits properly, including the two-finger rule and the right width for your dog’s neck.

Check whether your crate meets IATA live animal regulations and typical airline hold requirements before you fly.

Convert chest girth and neck measurements into the correct harness size, with fitting checks that prevent escapes and chafing.

Size a dog door flap and step-over height correctly from your dog’s shoulder height and width.

Find the bed dimensions that fit your dog stretched out rather than curled up, by measured length and sleeping style.

Estimate daily exercise minutes by breed group, age and energy level, split between walking and active play.

Work out how often your puppy needs to go out based on age, and how long it can realistically hold overnight.

Find the maximum time your dog can humanely stay crated by age, and how to split a working day around it.

Estimate the first-year and lifetime cost of owning a dog, from food and vet care to grooming, insurance and boarding.

Compare paying pet insurance premiums against saving the same amount yourself, over your dog’s expected lifetime.