Dog Food Calculator: How Much Should You Really Feed Your Dog?

The bag’s feeding chart isn’t really about your dog

Those charts are built from averages across an entire breed range.

They can’t know if your dog is a couch potato or runs laps around the yard all afternoon.

Two dogs at the same weight can need meaningfully different amounts once activity enters the picture.

Activity level changes the number more than people expect

A low-activity dog and a high-activity dog at the same weight can need noticeably different daily calories.

That gap adds up fast. Overfeed a low-activity dog using a high-activity number, and weight creeps on slowly without you noticing.

Underfeed an active dog, and they stay hungry and start losing condition.

Feeding by eye won’t get a dog to a healthy weight

“Just feed a bit less” is common advice, but it’s vague enough to not actually work.

A real number gives you something to measure against, and something to adjust if the weight isn’t moving after a few weeks.

Weight loss in dogs should be gradual. A sharp cut in food can do more harm than good.

Recalculate when things change

A dog that gets a new job as a running partner needs more food than the same dog on a quiet winter.

Weight loss, weight gain, a change in exercise routine, or getting older are all good reasons to run this again.

The number isn’t fixed for life. It’s a starting point for right now.

Your vet still has the final say

This calculator uses a standard formula vets use as a starting estimate, not a personalised medical plan.

Health conditions, medications, and breed-specific quirks can all shift what’s right for your dog.

Use this as a solid starting point, then let your vet fine-tune it from there.