Wet and dry cat food can both fit a healthy feeding routine, but they differ in moisture, energy density, convenience, storage and cost. This guide gives you a repeatable way to compare them for your own cat, estimate the daily and monthly spend, and decide whether a wet, dry or mixed diet is the most practical choice.
Overview
There is no single best format for every cat. The right choice depends on your cat’s age, health, appetite, body condition, routine and preferences, as well as the time and budget available at home. A complete wet food can provide substantial moisture, while complete dry food is compact, easy to measure and often convenient for households with busy schedules. Mixed feeding can combine some of these advantages, provided the total daily portion is adjusted.
The first check is the label. Choose a food described as complete for your cat’s life stage unless your vet has advised a different plan. A complementary food is designed to be fed alongside other food rather than as the sole diet. Treats, toppers and complementary pouches need to be included in the overall daily intake.
Wet food is usually sold in pouches, trays or tins and contains considerably more water than dry food. This can be useful for cats that drink little, although food should not be used to manage a suspected medical problem without veterinary advice. Dry food contains less water and is more energy-dense by weight, so a small-looking serving may provide more calories than the same weight of wet food.
Neither format should be assumed to clean teeth simply because it is dry, and wet food should not be dismissed as nutritionally inferior. Dental care, hydration and nutrition are separate considerations. If your cat has urinary, kidney, dental, weight or digestive concerns, ask your vet before changing the diet; a general comparison cannot replace a prescribed feeding plan.
How to estimate the cost
Compare foods by cost per day rather than by pack price. This avoids the common mistake of comparing a large dry-food bag with a box of wet pouches without accounting for the different serving sizes.
- Find the pack price. Record the price you would actually pay, including any delivery charge. If a promotion is temporary, record both the regular and promotional prices.
- Calculate the unit price. For dry food, divide the pack price by the pack weight in kilograms. For wet food, divide the price by the total number of pouches, trays or tins, or by the total weight if you are comparing different pack sizes.
- Find the daily amount. Use the manufacturer’s feeding guide as a starting point, taking account of your cat’s weight, age and activity. The guide is not a guarantee: monitor body condition and follow veterinary advice where relevant.
- Calculate daily cost. Multiply the price per gram or per serving by the amount fed each day.
- Calculate monthly cost. Multiply the daily cost by the number of days in your chosen period. Thirty days is a simple comparison; use your actual buying cycle when planning orders.
The basic formula is:
Daily cost = pack price ÷ total food in pack × food fed per day
For mixed feeding, calculate each part separately and add the results:
Mixed daily cost = wet-food daily cost + dry-food daily cost
This approach also works when comparing supermarket, premium or natural cat food. A higher price per pack does not necessarily mean a higher daily cost, and a lower shelf price may not be better value if your cat needs a larger serving or leaves part of it uneaten.
Inputs and assumptions
Write down the following details before comparing products:
- your cat’s current weight and whether it is under, at or above the desired body condition;
- life stage, such as kitten, adult or senior;
- the recommended daily amount for the specific product;
- pack size, pack price and any delivery charge;
- whether the food is complete or complementary;
- how much is discarded because of leftovers, spoilage or fussy eating;
- the amount and type of treats given each day.
Use the same assumptions for every product in a comparison. If one food is assessed using a promotional price and another uses its usual price, the result will be misleading. It is also helpful to record the date, retailer and pack size, because prices, multipack offers and subscription discounts change.
Storage can affect the practical value of each format. Dry food is easy to store, but keep it sealed and follow the manufacturer’s instructions after opening. Opened wet food generally needs prompt handling and refrigeration according to the product guidance. If your cat regularly refuses leftovers, include the wasted portion in your real cost rather than calculating only the amount that reaches the bowl.
Portion control matters for both formats. Use kitchen scales for dry food when accuracy is important, particularly if your cat is gaining weight or receives wet food and treats as well. For wet food, divide the daily allowance into meals that suit your cat and household. For a fuller starting point, see our cat feeding guide by age, weight and food type.
Worked examples
These examples use fictional prices and serving amounts to demonstrate the method. Replace them with the figures from the foods you are considering.
Dry food
Suppose a 2 kg bag costs £18 and the suggested daily amount is 55 g.
- 2 kg equals 2,000 g.
- £18 ÷ 2,000 g = £0.009 per gram.
- £0.009 × 55 g = £0.495 per day.
- £0.495 × 30 days = £14.85 for 30 days.
This is a food-cost estimate only. Treats, delivery and any wasted food would need to be added.
Wet food
Suppose a box of 24 pouches costs £22 and the feeding guide indicates three pouches per day.
- £22 ÷ 24 pouches = approximately £0.917 per pouch.
- £0.917 × 3 pouches = approximately £2.75 per day.
- £2.75 × 30 days = approximately £82.50 for 30 days.
Mixed feeding
Suppose the cat receives two wet pouches daily at £0.917 each, plus 25 g of the dry food above.
- Wet food: £0.917 × 2 = approximately £1.83 per day.
- Dry food: £0.009 × 25 g = approximately £0.23 per day.
- Total: approximately £2.06 per day, or £61.80 for 30 days.
The serving amounts in a mixed diet must come from the combined feeding guidance, not from feeding the full recommended amount of both foods. If you change the format, transition gradually and watch for digestive upset. Our guide to switching cat food safely explains how to plan a change over several days.
For further comparisons, use the same calculation when reviewing cat food by cost per day or comparing multipack value. This is more useful than choosing solely by the cheapest ticket price.
When to recalculate
Revisit your calculation whenever the price, pack size or feeding amount changes. Check again after a retailer promotion ends, a subscription price changes, delivery charges are introduced, or a different retailer offers a better pack format. Keep a note of the date and the price paid so that you can distinguish a genuine long-term saving from a short-term offer. Our guide to cat food subscriptions in the UK can help you assess convenience against flexibility.
Recalculate after your cat changes life stage, weight or activity level, or if your vet recommends a different food. A kitten’s needs will not be the same as an adult cat’s, and a senior or indoor cat may need a revised portion plan. If your cat is losing or gaining weight unexpectedly, has persistent digestive symptoms, drinks or urinates noticeably more, or stops eating, contact a vet rather than adjusting the diet based only on price.
Finally, judge the result on more than cost. A suitable food should be complete where intended, accepted by your cat, practical to store and portion, and compatible with any health advice. Record the food, daily amount, waste and monthly spend for two to four weeks, then review. That simple routine will show whether wet, dry or mixed feeding works best for both your cat and your budget.
