Please read before you use this tool

This calculator gives general guidance only, based on common blanketing charts. Every horse is an individual — coat, clip, age, health, body condition, acclimation, wind, wet, and shelter all change what a horse needs.

This is not veterinary advice and is not a substitute for your own horsemanship or your veterinarian. You are solely responsible for your horse's care and wellbeing. Always check your horse directly — sweating means too warm; shivering or a cold chest/ears can mean too cold.

This tool is provided "as is," with no warranty of any kind, and Horse Blanket Calculator and its operators accept no liability for any decision, outcome, injury, illness, or loss arising from its use. If you are unsure, stop and consult your veterinarian.

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Blanketing a senior horse

Q: Do senior horses need heavier blankets?

Often yes. Older horses, especially those that have lost muscle or struggle to hold weight, generate and retain less body heat, and conditions like Cushing's can leave them with a poor or non-shedding coat. Many seniors do well one weight category warmer than the chart suggests for their temperature and clip.

Q: Should I blanket a thin or underweight horse?

A horse uses body fat as both insulation and a fuel reserve for staying warm, so an underweight horse gets cold faster and burns precious energy doing it. Blanketing a thin horse a category warmer helps it put that energy into condition instead of heat - alongside plenty of forage and a vet check on why it is thin.

Q: How often should I check a senior horse's blanket?

At least twice a day in cold weather, and feel the body underneath. Older horses hide discomfort, lose condition quietly under a blanket, and can develop rubs or sores. Run a hand over the chest, shoulders, and ribs every time you adjust the blanket.

Older and hard-keeping horses feel the cold in ways the thermometer does not show. Here is how to keep them warm without over-doing it.

Calculate for my senior

Why seniors feel the cold more

A young, fit horse in good flesh is a furnace - it has muscle to generate heat, fat to hold it, and a coat that responds to the weather. Age chips away at all three. Older horses often carry less muscle, lose topline and body fat, and may have hormonal conditions like PPID (Cushing's) that leave them with a long, poor, or non-shedding coat that does not insulate properly. They are also less efficient at digesting the forage that fuels internal warmth.

The result is a horse that gets colder, faster, than its barnmates at the same temperature - and that quietly spends energy staying warm that it can ill afford to lose over winter. For most seniors, that means blanketing a little earlier and a little heavier, and watching them more closely.

Less insulation

Lost fat and muscle mean less of the horse's own heat retention - so a warmer blanket helps.

Forage first

Free-choice hay is a senior's best heat source. Blankets help, but they do not replace fuel.

Vet the why

A horse that is thin or not shedding needs a veterinary check, not just a heavier rug.

How to use the calculator for a senior

Tick "older / underweight" - this shifts the recommendation a category warmer to account for reduced heat retention.
Be honest about the coat: if a Cushing's horse has a long but ineffective coat, treat it as "normal" rather than "thick", since that hair is not insulating well.
Add wind and wet if your senior lives out; they have the least reserve to cope with a soaking.
Do not over-blanket either: a sweaty senior that then chills is worse off. Aim for warm and dry, and adjust as the day changes.

Check, every single day

The most important tool for a senior is your own hand. At least twice a day in cold weather, slide a hand under the blanket at the chest and shoulder - warm and dry is the target. Then run your hands over the ribs and topline: under a blanket, weight loss is invisible until you feel for it, and a senior can drop condition alarmingly fast in a cold snap. Watch for rubs at the shoulders and chest, and make sure the blanket is dry inside; a wet lining is worse than no blanket at all.

Common questions

Do senior horses need heavier blankets?

Often yes. Older horses generate and retain less body heat, and conditions like Cushing's can leave them with an ineffective coat. Many seniors do well a weight category warmer than the chart suggests.

Should I blanket a thin or underweight horse?

Yes - a thin horse has less insulation and burns precious energy staying warm. Blanket it a category warmer, feed plenty of forage, and have a vet look into why it is thin.

How often should I check a senior horse's blanket?

At least twice a day in cold weather, feeling the body underneath. Seniors hide discomfort and lose condition quietly under a blanket.

Recommended gear for seniors

Warm, well-fitting options for older horses:

Midweight turnout blankets (~200g) - a sensible everyday weight for many seniors.
Heavyweight turnout blankets (~300-400g) - for the coldest nights.
Neck covers and hoods - extra warmth for a thin-necked older horse in hard cold.

As an Amazon Associate we may earn from qualifying purchases, at no extra cost to you. A blanket is no substitute for veterinary care - please consult your vet about an older or underweight horse.

Get a weight for your senior

Enter the temperature, tick "older / underweight", and check the recommendation.

Open the calculator

Clipped horse

How clipping shifts the chart

By temperature

Degree-by-degree guidance

Blanketing FAQ

Weights, neck covers, and more