Feline Grimace Scale (FGS) Calculator
Select one option in each category.
What is Feline Grimace Scale (FGS) Calculator
The Feline Grimace Scale (FGS) is a validated tool that scores a cat's pain from five facial action units: ear position, orbital tightening, muzzle tension, whisker change, and head position. Each is rated from 0 to 2, for a total of 0 to 10. A total of 4 or more suggests the cat is likely in pain and a veterinary assessment should be considered.
How to use
- Observe the cat's face at rest, from a safe distance, before handling it.
- Score each of the five action units: ear position, orbital tightening, muzzle tension, whisker change, and head position.
- Add up the five scores to get the total out of 10.
- Check whether the total is at or above 4, the cutoff that suggests pain.
When to use it
Noticed your cat's ears flattened sideways, eyes squinted, and head held lower than its shoulders after a procedure? Score those three action units plus the muzzle and whiskers and you might land on 6 out of 10, above the pain cutoff. That number gives you something concrete to describe to your vet instead of just saying the cat seems off.
Frequently asked questions
What is the Feline Grimace Scale used for?
It is a quick, validated way to screen for acute pain in cats by scoring five facial action units. Veterinary teams use it after surgery or injury, and cat owners can use it at home to decide whether a vet visit is needed.
What score means my cat is in pain?
A total of 4 or more out of 10 is the published cutoff that suggests pain and supports considering analgesia. A lower total does not rule out pain entirely, since some cats mask discomfort, so trust your own observations too.
How should I observe my cat before scoring?
Watch from a short distance for one to two minutes before approaching, ideally while the cat is resting and not interacting with people. Handling or stress can tighten the face and inflate the score, so score what you see at rest first.
Can I share this tool with my selections pre-filled?
Yes. The URL updates automatically as you select each option. Copy it from the address bar or use the Share button, anyone who opens the link will see your exact scores ready to go.
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