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The calculator divides the bag price by the bag weight to get the cost per kilogram, then multiplies by your cat's daily portion in grams (divided by 1000) to get the cost per day. Multiply by 30 for the monthly cost, and divide the total bag grams by the daily portion to find how many days each bag lasts.
The true cost of cat food is not the price on the bag, it is the cost per day. A 10-pound indoor cat eats about 200-250 calories a day, roughly 60-100 grams of dry food. Divide your bag price by its weight in kilograms to get the cost per kilogram, multiply by the daily portion (in kilograms) and you have the cost per day. Two bags with the same price can feed your cat for very different numbers of days, which is exactly what this calculator exposes.
Dry kibble remains the cheapest option: budget brands run $8-15 per month per cat, mid-range $18-28, premium $30-45. Wet food costs far more per calorie, budget cans $27-35 a month, premium brands $95-210, because cans are about 75% water and you are paying for moisture. Raw diets average around $45 a month. A popular middle ground is one wet meal a day plus dry food, which typically lands at $35-48 a month.
Comparing price per bag or per pound misleads, because different foods are eaten in different amounts, a 10-pound bag of two foods will not last the same number of days. Veterinary nutritionists recommend comparing the cost per kilocalorie instead: divide the food's price by its total calories. Wet food almost always loses this comparison, since canned food costs much more per calorie than dry, and cat foods run pricier per calorie than dog foods because of their higher protein and fat content.
Enter your currency, the net weight of the bag in kilograms, the price you paid, and how many grams your cat eats per day (check the feeding chart on the bag, or weigh a typical day's portion on a kitchen scale). The calculator instantly shows your cost per day, cost per month, and exactly how many days the bag will last. Try it with two different brands side by side, the cheaper bag often costs more per day.
Divide the bag's total grams by your cat's daily grams. A 7 kg (15 lb) bag at 100 g per day lasts 70 days; at 80 g per day it stretches to nearly 88 days. Dry food stays fresh about 6-8 weeks after opening, so buy a bag size your cat can finish in that window. Note that roughly 4 cups of kibble fit in one pound, so a 7-pound bag holds about 28-30 cups.
Measure every meal, most owners overfeed by about 20%, wasting $5-15 a month. Buy larger bags (the price per kilogram drops sharply) and use autoship subscriptions for 5-10% off. Mix half dry with half wet instead of going all-wet to cut costs nearly in half. Store dry food in an airtight bin and use it within 6 weeks of opening. Finally, keep your cat at a healthy weight: an overweight cat eats more and risks expensive health problems later.
Most owners spend $25-75 per month on cat food alone. Budget dry food runs $8-15 a month, a half-dry half-wet mix $35-48, and premium all-wet feeding $95-210. Use the calculator above with your own bag price and portion to get your exact number. Multiply the monthly figure by 12 for the yearly picture: budget dry feeding runs about $100-180 per cat food cost per year, while premium all-wet feeding can reach $1,100-2,500 per year.
Canned food is about 75% water, so you pay for moisture, and it costs much more per calorie than dry food. A 3-ounce can with 70-100 calories typically feeds a 10-pound cat only part of one day, while the same calories in dry food cost a fraction. The hydration benefit is real, which is why many owners mix the two.
At 100 grams per day, a 7 kg bag lasts 70 days; at 80 grams per day, about 88 days. Divide your bag's total grams by your cat's daily grams for the exact answer, the calculator does this for you.
A typical 10-pound indoor adult cat needs 200-250 calories a day, which is about 60-100 grams (roughly 1/3 to 1/2 cup) of most dry foods. Check the feeding chart on your bag and adjust for your cat's weight and activity, and confirm with your vet if unsure.
Sometimes. Premium foods usually contain more meat and fewer fillers, so cats often need smaller portions, which can make the cost per day similar to cheaper brands. Compare cost per day, not bag price, with the calculator before deciding, and switch gradually over 7-10 days.
Measure portions instead of free-feeding, buy larger bags, use autoship discounts of 5-10%, mix dry with a little wet instead of all-wet, and buy cases of cans on sale. Overfeeding by 20% wastes $5-15 a month, measuring is the single biggest saving.
Cost per calorie is the food's price divided by its total kilocalories, the fairest way to compare two foods, because pets eat different amounts of different diets. A cheap-looking bag can cost more per calorie than a pricier one. Compare cost per day in this calculator, which captures the same idea.
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