Hill's Prescription Diet · Dry kibble

k/d with Ocean Fish Cat Food

118 mg P / 100 kcalPrescription diet

Phosphorus

Per 100 kcal

118mg

Dry matter

0.51%

As fed (label)

0.481%

0100200300400+

mg phosphorus per 100 kcal — for comparing foods, not a recommendation

This food provides 118 mg of phosphorus per 100 kcal. Many cats with CKD benefit from a veterinarian-recommended renal diet or an individual phosphorus-control plan, but a food’s phosphorus number alone doesn’t decide whether it’s right for your cat. Ask your vet, based on lab results, appetite, calorie intake, body condition and other health conditions.

Nutrition at a glance

Protein (DMB)

29.3%

6.8 g / 100 kcal

Fat (DMB)

22.5%

Sodium (DMB)

0.26%

60 mg / 100 kcal

Calories

4,084kcal/kg

498 kcal per cup

Label values as fed
Label (as fed)	Value
Moisture	5.6%
Protein	27.7%
Fat	21.2%
Fiber	2.9%
Phosphorus	0.481%
Sodium	0.245%

Prescription diet

Prescription diet — follow your vet’s guidance. Renal diets are adjusted in several ways besides phosphorus, and studies link them to longer, better lives for many cats with CKD.

Compare with similar foods

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About this data

Confidence: A · Manufacturer typical analysis
Source: hillspet.com
Per-calorie phosphorus: Calculated from the manufacturer’s dry-matter analysis (modified Atwater energy)
Last verified: November 8, 2026
Package: cup

Formulas change. Always check the current label on the package.

How we calculate

US labels list nutrients as fed, including all the water. To compare foods fairly we convert them two ways:

Dry matter basis (DMB) = as-fed % ÷ (100 − moisture %) × 100. This removes water, so a pâté and a kibble can be compared.
mg per 100 kcal = as-fed % × 1,000,000 ÷ kcal per kg. Cats eat to meet their calorie needs, so this shows how much phosphorus comes with the energy they eat. We highlight this number.

When a food has no calorie statement we estimate calories with modified Atwater factors (3.5 kcal/g protein, 8.5 kcal/g fat, 3.5 kcal/g carbohydrate) and say so on the page. Estimates can be off by 10% or more.

We don’t label foods “low”, “moderate” or “high” in phosphorus: there is no accepted veterinary scale that says which number is right for an individual cat with CKD. We show the number, its source and how it was calculated, so you can compare foods and talk it through with your vet. A food’s phosphorus number alone doesn’t decide whether it’s right for your cat.

Try it yourself with the dry matter calculator, or read how to read a cat food label. Spotted an error? Email 781960591@qq.com.

Nutrition figures are for information only and come from the source shown. Formulas change, so check the current label. Many cats refuse renal diets; some vets suggest lower-phosphorus regular foods as an alternative. Always discuss diet changes with your vet, and never stop a prescription diet without their guidance.

Read our full medical disclaimer.