How many fewer calories does an indoor cat need compared to an outdoor cat?

Roughly 20–40% fewer, depending on the individual cat's actual activity levels. A sedentary neutered indoor cat may need a calorie multiplier as low as 1.0–1.2× their resting energy requirement, while an active or outdoor cat might need 1.4–1.6×. Using a calorie calculator that lets you specify activity level gives you a more accurate number than a generic estimate.

My cat is indoor-only but very playful. Do they still need fewer calories?

An actively playful indoor cat will have higher calorie needs than a sedentary one, so the indoor/outdoor distinction is really about activity level rather than geography alone. If your cat genuinely engages in vigorous play for extended periods daily, they may need more than a typical low-activity indoor estimate -- monitoring body weight is the best way to calibrate.

Should I free-feed my indoor cat?

Free-feeding (leaving food available all day) works well for some cats but tends to lead to overconsumption in many indoor cats, particularly in low-stimulation environments where eating becomes a habitual behaviour rather than a hunger-driven one. Measured meals are generally the safer approach for maintaining a healthy indoor cat weight.

Does an indoor cat need more water than an outdoor cat?

Not necessarily more in absolute terms, but indoor cats eating primarily dry food get far less moisture from their diet than outdoor cats who hunt and eat prey. Ensuring fresh water is always available -- and considering wet food as part of the diet -- is an important consideration for indoor cat urinary health.

Indoor vs Outdoor Cat Nutrition | PetCalculator

Indoor and outdoor cats have different calorie needs, and indoor cats are significantly more prone to obesity. Here's how to adjust feeding for your cat's actual lifestyle.