The useful answer
Adult dogs often spend roughly half the day asleep. Puppies can sleep around 18–20 hours. Older dogs may rest more, but age alone does not define what is healthy for an individual.
Age guide, with uncertainty
Use 18–20 hours as a broad puppy reference and 12–14 hours for an adult dog. The tracker uses 12–18 hours for senior dogs as a deliberately wider planning band, not a medical threshold. Large dogs may enter its senior category earlier. These are not guaranteed needs.
Breed, work and routine
Working dogs, relaxed household dogs and recently adopted dogs can have different schedules. Record breed, activity and recent changes as context; do not subtract sleep hours simply because a dog is active.
How to build a baseline
Log naps as well as night sleep. Exclude awake intervals and mark only fully observed days complete. Three complete days begin a tentative baseline; a week or more gives better context. Compare like-for-like days rather than a partial workday with a full weekend.
When to discuss a change
A persistent change from your dog’s usual pattern is more useful than a single population average. Mention changes in appetite, toileting, energy or medicines to your vet. A calculator cannot determine the cause of extra sleep.
| Puppy | 18–20 |
|---|---|
| Adult dog | 12–14 |
| Senior dog | 12–18 |
Educational guidance, not a diagnosis. Stillness is not always sleep. Missing observations are not zero sleep.
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