Every dog calculator on this site, now on your phone
139 free calculators for your dog's age, food, health and life stage. No ads, no account, and it all works offline, so you get an answer at the vet or the park with no signal.
Android out now. iPhone coming soon, and you can join the iPhone waitlist below.
A look inside the app
Why dog owners use the app
Free forever
All 139 calculators, with no paywall and no ads. Nothing is locked, and nothing is upsold.
No account needed
Open the app and start. There is no sign-up and nothing to create. Signing in is optional, and only exists to sync saved results.
Works offline
Everything runs on your phone. You get an answer at the vet or the park with no signal, which is exactly where the toxicity checks matter.
Search built in
Type "chocolate", "age" or "calories" and jump straight to the tool you need instead of browsing categories.
Save and get reminders
Keep results for each dog and set reminders for the next weight check, heat cycle or vet visit.
The same formulas
The calculators are the ones on this site, built on published veterinary formulas and rebuilt for a phone screen.
What is inside
How old is my dog?
- Dog age calculator (dog years to human years)
- Life expectancy, plus life expectancy by weight
- Puppy development and puppy weight predictor
- Senior care timeline and quality-of-life tools
How much should my dog eat?
- Daily calorie needs calculator
- Weight management and healthy-weight planner
- Body condition score
- Portion, protein and nutrition calculators for every life stage
Is it safe for my dog?
- Chocolate toxicity calculator
- Xylitol risk calculator
- Grape and raisin risk calculator
- Onion, garlic, caffeine and macadamia nut checks
Is my dog in heat?
- Heat cycle calculator, with optional cycle tracking
- Ovulation and breeding-timing calculators
- Pregnancy due-date calculator
- Litter size estimator
Plus cost and budget planners, and the rest of the 139 tools you can already use on the Calculators for Dogs website.
Want it on your iPhone?
The iPhone version is in development. Leave your email and we will send you a single message the day it is on the App Store. In the meantime, every calculator works free in your phone's browser.
One email at launch. No newsletter, no sharing your address.
App questions
Is the Calculators for Dogs app free?
Yes. All 139 calculators are free, with no paywall, no ads and no trial. There is no paid tier to upgrade to.
Does the dog calculator app work offline?
Yes. Every calculator runs entirely on your phone, including the breed database. You can check a chocolate toxicity dose or a feeding amount with no signal at all.
Do I need an account to use the app?
No. You can open the app and use every calculator without signing up. An optional account exists only if you want saved results and heat-cycle tracking to sync across devices.
Is there an iPhone version of the app?
Not yet. The Android app is available on Google Play now, and the iPhone version is in development. Join the waitlist on this page and we will send you one email the day it is released.
Are the app calculators the same as the website ones?
Yes. The app uses the same published veterinary formulas as this website, and results are checked against the website output before each calculator ships.
Does the app replace a vet?
No. The app is an educational tool, not a medical device, and it does not diagnose or treat any condition. Use it to understand your dog and ask better questions, and call your vet or an animal poison hotline in an emergency.
What data does the app collect?
Calculations run on your device and saved results stay on your phone unless you choose to create an account and sync them. There are no ads and therefore no ad tracking.
How big is the app and what Android version does it need?
It is a small download because the calculators are formulas rather than media. It runs on current Android versions; Google Play will tell you if your device is supported before you install.
Get the Android app
139 calculators, free, offline, no account.
Calculators for Dogs is an educational tool. It is not a medical device and does not diagnose, treat, cure or prevent any condition. Always consult your veterinarian, and in an emergency call your vet or an animal poison hotline.