Food safety · 2 min read

Can cats eat Coffee grounds?

No — dangerous

No. Used coffee grounds still contain significant caffeine — sometimes more per gram than fresh brew. A cat rooting in a compost caddy or bin and swallowing grounds can receive a toxic caffeine dose.

If your cat has just eaten coffee grounds

  1. Move your cat away from the coffee grounds.
  2. Don't induce vomiting at home — this is dangerous in cats.
  3. Call your vet or out-of-hours emergency vet immediately.
  4. If you can't reach a vet, call the Animal PoisonLine on 01202 509000 — 24/7, charges apply.
  5. Note how much coffee grounds was eaten, when, and your cat's weight.

What's the full picture?

Used coffee grounds typically retain 20–50% of their original caffeine. A tablespoon of grounds (~5 g) holds 25–50 mg of caffeine — enough to affect a small cat.

The gardening habit of spreading coffee grounds on beds is a specific risk — outdoor cats may investigate or eat the material, and the caffeine is still active.

Fresh coffee beans are even more concentrated. Keep all coffee products behind a cupboard door.

Symptoms to watch for

30–120 minutes
Restlessness, rapid heart rate, tremors, vomiting.
2–12 hours
Seizures with larger doses. Emergency.

If you're worried right now

Call your vet or out-of-hours emergency vet first. For poison advice, the Animal PoisonLine (UK) is on 01202 509000 — 24/7, charges apply. Your vet can also call the Veterinary Poisons Information Service (VPIS) directly.

Black tea / tea bags no Caffeine (coffee, tea, energy drinks) no Energy drinks no

About this guidance

Every entry on this site is compiled from published UK veterinary toxicology sources — International Cat Care, Veterinary Poisons Information Service (VPIS) references, RCVS-registered practice materials, and peer-reviewed feline medicine literature. Where the evidence is mixed, we err on the cautious side because cats are unusually sensitive to many common substances that are harmless to humans and even to dogs.

This is general information written for UK cat owners. It is not personalised veterinary advice for your specific cat, their age, weight, medical history, or the exact exposure you're dealing with. If your cat has eaten something or is unwell, call your vet first. The Animal PoisonLine on 01202 509000 is available 24/7 for a small fee and can tell you whether an emergency visit is needed.

Entries are reviewed and updated as new research emerges. Spotted an error? Let us know — corrections are investigated and applied within 24 hours. For more context on how we work, see about and our full disclaimer.

Last reviewed: · By the What Can My Cat Eat? editorial team

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