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Pets

Cat water needs calculator

Cat water needs calculator: Pet values are rough planning estimates.

Your result

Complete the fields and calculate.

Calculation method and formula

Body weight [kg] × Guide per kg [ml/kg]

Understand the inputs

Body weight
Unit: kg. Minimum 0.1. Use a measured value or your own assumption.
Guide per kg
Unit: ml/kg. Minimum 1. Use a measured value or your own assumption.

Assumptions and limitations

Pet values are rough planning estimates. Food energy, body condition, growth, weather and illness affect needs. Ask a vet about individual feeding and fluid needs.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

Worked example

Illustrative values. Replace them with your own inputs for your calculation.

Body weight
4.5 kg
Guide per kg
50 ml/kg
Example result225 ml/day

Food type, weather, activity and illness affect water needs. Ask a vet about unusual changes.

Model revision: October 17, 2026 · How CleverCalc works

FAQ

Frequently asked questions

How does Cat water needs calculator work?+

Body weight [kg] × Guide per kg [ml/kg]. Pet values are rough planning estimates. Food energy, body condition, growth, weather and illness affect needs. Ask a vet about individual feeding and fluid needs.

What assumptions should I consider for this result?+

Pet values are rough planning estimates. Food energy, body condition, growth, weather and illness affect needs. Ask a vet about individual feeding and fluid needs. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

How accurate is the result?+

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Health values are general information, not a diagnosis or personal treatment recommendation.

Is this calculator free?+

Yes. Calculations and PDF export work without an account or registration.

What happens to my inputs?+

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.

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