Big love.
Little calculations.
How old? How much? What size? Clear answers to the everyday numbers in your pet’s life.
Good answers start
with good sources.
Manual
References,
not endorsements
What’s your pet question?
A calculator when you need a number.
A clear chart when a range says more.
How old in human years?
Dog & cat age calculator
Put their years in perspective, with dog size taken into account.
How big will my puppy get?
Puppy size predictor
Use a known milestone weight for a rough adult-size estimate.
What does this weight mean?
Cat & kitten weight charts
Explore early kitten weight bands and adult breed references.
How much goes in the bowl?
Food & calorie calculator
From daily calories to dry-food cups and wet-food cans.
When might the litter arrive?
Pregnancy due-date calculator
See a date window, with the assumptions made clear.
Room to stretch out?
Dog crate size calculator
Work out starting length and height from your dog’s measurements.
A snug, comfortable fit?
Collar size checker
Compare a neck measurement with a product’s size range.
Ready for the next walk?
Dog harness size checker
Check both neck and chest against the maker’s size chart.
Enough room for your cat?
Litter-box size calculator
Find a starting box length and how many boxes to offer.
No tool matches that yet. Try another word, or pick a section above.
From calories
to cans.
“One can” isn’t a universal serving. Use your food’s calorie label to turn a daily energy estimate into a practical portion.
Work out their portionsfeeding plan
A 10 lb adult cat
Neutered · healthy weight · wet food only
portion2.7–3.2 cans
AAHA energy factors. Your food’s label and your pet’s needs change the result. The can’s calories are an example value.
A little context. A lot more clarity.
How we use sourcesWhy pet years aren’t a simple ×7.
Size and early development change the picture.
Read the explanationThe useful number on the food label.
Find the calorie value that matches the portion you measure.
Understand the labelA “medium” isn’t always a medium.
Check measurements against the product you’re buying.
Get a better fitBefore you run the numbers.
Helpful estimates, with their limits out in the open.
How accurate are the calculators?
As accurate as the published references behind them, and no more. Each tool names the chart or formula it uses, shows a range where the source gives one, and links to the source. Your own pet may differ from the averages.
Can I use pounds, inches, and metric units?
Yes. Weight tools take pounds or kilograms, the gear tools take inches or centimeters, and kitten weights can be entered in grams or ounces.
Does PawsRuler replace veterinary advice?
No. The tools give starting points for everyday questions. They don’t diagnose, give medication doses, or plan care for a pet who is ill, pregnant, nursing or losing weight: that is your veterinarian’s job.
Are my pet’s details saved?
Only if you add a pet in My pet. The details stay in this browser on this device, are never sent to us, and you can delete them at any time.