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Mouse Nutrition Calculators and Tools

These calculators work out what and how much to feed a mouse: daily calories, portion sizes, feeding schedules, water needs and which foods to keep away from it. All 4 are free, quick and based on mouse reference data.

Nutrition4 tools

All 4 mouse nutrition tools

Mouse Nutrition tools: what they help with

These calculators work out what and how much to feed a mouse: daily calories, portion sizes, feeding schedules, water needs and which foods to keep away from it. Diet is the single biggest thing most owners control. Getting portions right prevents obesity and the many problems that come with it in a mouse.

What to know about nutrition and feeding for mice

A typical adult mouse weighs 20-45 g. Mice are omnivores, which shapes what you feed and how much.

Mouse quick facts

Reference values for mice from the species data behind this tool.
MeasureMouse
Typical lifespan1.5–3 years
Adult weight0.7–1.6 oz (20–45 g)
DietOmnivore
Mature atAbout 2 months
Pregnancy19–21 days
Litter size5–12
Humidity40–60%

A practical tip

Weigh food rather than using a cup or scoop. Measuring by volume is one of the most common reasons pets are overfed.

Other mouse topics

Most questions lead to another. You may also find these useful: mouse age tools, mouse behavior tools, mouse breeding tools and mouse cost tools. Or see every mouse tool in one place.

Nutrition tools for other pets

The same kind of tool exists for other species, each using that animal's own reference data: dog nutrition, cat nutrition, rabbit nutrition and hamster nutrition.

Frequently asked questions

How much should I feed my mouse?

It depends on body weight, age and activity. The mouse food and calorie calculators give a daily starting amount, which you then adjust based on body condition.

How much should an adult mouse weigh?

A typical adult mouse weighs 20-45 g, though frame and body condition matter as much as the number.

Which mouse nutrition tool should I use first?

Most people start with the Mouse Food Calculator, the most used tool in this group. If your question is more specific, the list above describes what each of the 4 tools does.

How accurate are the results?

They are estimates based on published reference data for mice, and each tool lists its sources. Individual animals vary, so treat results as a guide and check health decisions with your vet.