How many calories should a cat eat?

How Many Calories Should A Cat Eat Per Day?

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How many calories should a cat eat per day?

The best way to calculate a cat’s daily requirements is to calculate your cat’s resting energy requirements (RER) which is the amount of energy (in calories) expended in a day without any activity; it is similar to basal metabolic requirements.

Once you have calculated your cat’s RER, the formula then shows how to calculate your cat’s DER (daily energy requirements) which is several calories your cat should eat each day.

Always seek veterinary advice before you put a cat on a calorie restricted diet.

Source: DVM

Resting energy requirements (RER)

Resting energy requirements
1 kg2.2 lbs100 calories
1.5 kg3.3 lbs115 calories
2 kg4.4 lbs130 calories
2.5 kg5.5 lbs145 calories
3 kg6.6 lbs160 calories
3.5 kg7.7 lbs175 calories
4 kg8.8 lbs190 calories
4.5 kg9.9 lbs205 calories
5 kg11 lbs220 calories
5.5 kg12.1 lbs235 calories
6 kg13.2 lbs250 calories
6.5 kg14.3 lbs265 calories
7 kg15.4 lbs280 calories

 

Growing kittens (RER x 2.5)

Resting energy requirements
1 kg2.2 lbs250 calories
1.5 kg3.3 lbs287.5 calories
2 kg4.4 lbs325 calories
2.5 kg5.5 lbs362.5 calories
3 kg6.6 lbs400 calories
3.5 kg7.7 lbs437.5 calories
4 kg8.8 lbs475 calories
4.5 kg9.9 lbs512.5 calories
5 kg11 lbs550 calories
5.5 kg12.1 lbs587.5 calories
6 kg13.2 lbs625 calories
6.5 kg14.3 lbs662.5 calories
7 kg15.4 lbs700 calories

Maintenance – desexed adult (RER x 1.2)

Resting energy requirements
1 kg2.2 lbs120 calories
1.5 kg3.3 lbs138 calories
2 kg4.4 lbs156 calories
2.5 kg5.5 lbs174 calories
3 kg6.6 lbs192 calories
3.5 kg7.7 lbs210 calories
4 kg8.8 lbs228 calories
4.5 kg9.9 lbs246 calories
5 kg11 lbs264 calories
5.5 kg12.1 lbs282 calories
6 kg13.2 lbs300 calories
6.5 kg14.3 lbs318 calories
7 kg15.4 lbs336 calories

Intact adult (RER x 1.4)

Resting energy requirements
1 kg2.2 lbs140 calories
1.5 kg3.3 lbs161 calories
2 kg4.4 lbs182 calories
2.5 kg5.5 lbs203 calories
3 kg6.6 lbs224 calories
3.5 kg7.7 lbs245 calories
4 kg8.8 lbs266 calories
4.5 kg9.9 lbs287 calories
5 kg11 lbs308 calories
5.5 kg12.1 lbs329 calories
6 kg13.2 lbs350 calories
6.5 kg14.3 lbs371calories
7 kg15.4 lbs392 calories

Obese prone (RER x 1)

Resting energy requirements
1 kg2.2 lbs100 calories
1.5 kg3.3 lbs115 calories
2 kg4.4 lbs130 calories
2.5 kg5.5 lbs145 calories
3 kg6.6 lbs160 calories
3.5 kg7.7 lbs175 calories
4 kg8.8 lbs190 calories
4.5 kg9.9 lbs205 calories
5 kg11 lbs220 calories
5.5 kg12.1 lbs235 calories
6 kg13.2 lbs250 calories
6.5 kg14.3 lbs265 calories
7 kg15.4 lbs280 calories

Weight loss (RER x .8)

Resting energy requirements
1 kg2.2 lbs80 calories
1.5 kg3.3 lbs92 calories
2 kg4.4 lbs104 calories
2.5 kg5.5 lbs116 calories
3 kg6.6 lbs128 calories
3.5 kg7.7 lbs140 calories
4 kg8.8 lbs152 calories
4.5 kg9.9 lbs164 calories
5 kg11 lbs176 calories
5.5 kg12.1 lbs188 calories
6 kg13.2 lbs200 calories
6.5 kg14.3 lbs212 calories
7 kg15.4 lbs224 calories




Julia Wilson is a cat expert with over 20 years of experience writing about a wide range of cat topics, with a special interest in cat health, welfare and preventative care.Julia lives in Sydney with her family, four cats and two dogs. She enjoys photography, gardening and running in her spare time.Full author bio Contact Julia