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Rabbit Food Calculator

Calculate daily pellet, hay, and vegetable amounts for rabbits by weight and age. Enter values for instant results with step-by-step formulas.

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Pets & Animals

Rabbit Food Calculator

Calculate daily pellet, hay, and vegetable amounts for rabbits by weight and age. Get monthly food cost estimates and feeding guidelines.

Last updated: December 2025

Calculator

Adjust values & calculate
Daily Food Plan (per rabbit)
1.25 oz pellets + unlimited hay + 1.00 cups veggies
adult rabbit, 5 lbs
Daily Pellets
1.25 oz
Daily Hay
Unlimited
~5.0 oz minimum
Daily Vegetables
1.00 cups
Daily Water
10 oz
Monthly Needs (per rabbit)
Pellets38 oz (2.4 lbs)
Hay9.4 lbs
Vegetables30.0 cups
Monthly Cost (1 rabbit)
$42.19
Annual Cost
$506.00
Remember: Hay should be the foundation of your rabbit's diet (80%). Pellets are a supplement, not the main food. Always provide fresh, clean water.
Your Result
Daily: 1.25 oz pellets, 1.00 cups veggies | Monthly Cost: $42.19
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Understand the Math

Formula

Daily Pellets (oz) = Weight (lbs) x Rate per lb x Activity x Modifiers

Base pellet rate varies by age: 0.25 oz/lb for adults, 0.4 oz/lb for juveniles, 0.5 oz/lb for babies. Hay should be unlimited (body-size bundle daily). Vegetables: 0.2 cups/lb for adults. Adjust for activity level and pregnancy/nursing.

Last reviewed: December 2025

Worked Examples

Example 1: Single Adult Rabbit (5 lbs)

Calculate daily food amounts for a 5-pound adult rabbit with moderate activity level.
Solution:
Pellets: 5 lbs x 0.25 oz/lb = 1.25 oz/day (~1/4 cup) Hay: Body-size bundle, approximately 5 oz/day (unlimited ideal) Vegetables: 5 lbs x 0.2 cups/lb = 1.0 cup/day of leafy greens Water: 5 lbs x 2 oz/lb = 10 oz/day minimum
Result: Daily: 1.25 oz pellets, unlimited hay, 1 cup veggies, 10 oz water

Example 2: Two Juvenile Rabbits (3 lbs each)

Calculate monthly food needs for two 3-pound juvenile rabbits (3-7 months old).
Solution:
Per rabbit daily: Pellets 3 x 0.4 = 1.2 oz, Hay 3 x 1.2 = 3.6 oz, Veggies 3 x 0.1 = 0.3 cups Monthly per rabbit: Pellets 36 oz, Hay ~6.75 lbs, Veggies 9 cups Total for 2: Pellets 72 oz, Hay ~13.5 lbs, Veggies 18 cups Estimated monthly cost: ~$35
Result: Monthly for 2: 72 oz pellets, 13.5 lbs hay, 18 cups veggies (~$35/month)
Expert Insights

Background & Theory

The Rabbit Food Calculator applies the following established principles and formulas. Caring for pets and animals involves a range of quantitative calculations that directly affect animal health and welfare. The resting energy requirement (RER) for dogs and cats is a foundational formula used by veterinarians and nutritionists to determine baseline caloric needs: RER (kcal/day) = 70 ร— body weight in kilograms raised to the power of 0.75. This allometric scaling reflects the relationship between metabolic rate and body mass across species. Daily energy requirements for activity, growth, reproduction, or illness are then derived by multiplying the RER by a life-stage factor. Medication dosing in veterinary practice is calculated on a milligrams-per-kilogram basis, making accurate weight measurement essential. A drug prescribed at 5 mg/kg for a 12 kg dog requires a 60 mg dose, and errors in weight estimation can result in underdosing or toxicity. Age equivalence formulas allow owners to contextualise their pet's life stage in human terms. A commonly cited model for dogs adjusts for the non-linearity of canine ageing: the first year corresponds to approximately 15 human years, the second to about 9, and each subsequent year to roughly 4โ€“5, though this varies considerably by breed size. Large breeds age faster than small breeds, particularly in middle and later life. Aquarium stocking density is often cited using the approximate guideline of one inch of fish body length per gallon of water, though this rule has significant caveats: it does not account for fish height or body mass, bioload differences between species, filtration capacity, or territorial behaviour. More sophisticated stocking calculations incorporate surface area and filter turnover rate. Pet food label analysis requires understanding the guaranteed analysis panel: crude protein and fat percentages are listed on an as-fed basis, and converting to dry-matter basis (dividing by the fraction of dry matter) allows meaningful comparison between wet and dry foods with different moisture contents. Gestation period tracking for breeding animals requires knowing species-specific durations: approximately 63 days in dogs, 65 in cats, and 114 in pigs.

History

The history behind the Rabbit Food Calculator traces back through the following developments. The relationship between humans and domesticated animals stretches back to the Paleolithic era. Archaeological and genetic evidence indicates that dogs were domesticated from wolves approximately 15,000 years ago, likely through a process of mutual association between human hunter-gatherer groups and wolves that scavenged their campsites. The selective pressures of this relationship produced animals more tolerant of human proximity and more responsive to human social cues. Cat domestication followed a different trajectory, emerging in the Near East roughly 10,000 years ago in association with the advent of grain agriculture. Wildcats (Felis silvestris lybica) were attracted to the rodent populations that grain stores supported, and their presence was tolerated and eventually encouraged by early farming communities. Evidence of a particularly close human-cat relationship appears prominently in ancient Egyptian culture from around 3000 BCE, where cats were associated with divine protection and depicted in art across millennia. Livestock breeding programs developed empirically over thousands of years as agricultural societies selected animals for milk yield, draught capacity, wool quality, and docility. The formal science of genetics, following the rediscovery of Mendel's work around 1900, eventually provided a mechanistic basis for understanding and predicting hereditary traits. The veterinary medicine profession was formally institutionalised with the founding of the Royal College of Veterinary Surgeons in London in 1791 and the establishment of veterinary schools across Europe in the late 18th century. In the United States, the American Society for the Prevention of Cruelty to Animals was founded in 1866 by Henry Bergh, marking the beginning of organised animal welfare advocacy in North America. The 20th century brought rapid advances in veterinary diagnostics, surgical technique, anaesthesia, and pharmacology, progressively narrowing the gap between human and animal medical care. The pet insurance industry emerged in Sweden in the 1920s and expanded globally through the late 20th century. Microchipping of companion animals, which allows permanent identification via implanted RFID transponders, became standard practice in many countries during the 1990s and 2000s, with regulations mandating chipping for dogs in the United Kingdom taking effect in 2016.

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Frequently Asked Questions

Hay should make up approximately 80 percent of a rabbit's diet and should be available unlimited at all times. A healthy adult rabbit typically eats a bundle of hay roughly equal to its own body size every day. Timothy hay is the most recommended variety for adult rabbits because of its high fiber content and balanced calcium levels. For young rabbits under 7 months, alfalfa hay can be offered as it provides extra protein and calcium needed for growth. Orchard grass, meadow hay, and oat hay are excellent alternatives or supplements to timothy. The constant chewing of hay is essential for proper dental health because rabbit teeth grow continuously at a rate of about 2 to 3 millimeters per week and need fibrous material to wear down naturally.
Adult rabbits should receive approximately one-quarter cup of high-quality timothy-based pellets per 5 pounds of body weight per day. Overfeeding pellets is one of the most common rabbit diet mistakes because it leads to obesity and reduces hay consumption. For baby rabbits under 12 weeks, pellets can be offered in unlimited quantities along with unlimited alfalfa hay to support rapid growth. From 12 weeks to 7 months, gradually reduce pellet portions while increasing hay availability. Choose pellets that are plain without added dried fruits, seeds, or colored pieces, as these additives are high in sugar and fat. Quality pellets should contain at least 18 percent fiber, no more than 14 percent protein, and less than 2 percent fat for adult maintenance.
Rabbit dietary needs change significantly across their life stages. Baby rabbits from birth to 12 weeks should have unlimited access to their mother's milk, alfalfa hay, and alfalfa-based pellets. From 12 weeks to 7 months, continue alfalfa but begin introducing timothy hay and small amounts of vegetables one at a time. At 7 months, transition fully to timothy hay, reduce pellets to one-quarter cup per 5 pounds of body weight, and increase vegetable variety. Adult rabbits from 1 to 5 years maintain this balanced diet of mostly hay with measured pellets and fresh vegetables. Senior rabbits over 5 years may need calorie adjustments if they become less active, and some may benefit from slightly increased pellets if they have difficulty maintaining weight.
A rabbit typically drinks about 50 to 150 milliliters of water per kilogram of body weight daily, which translates to approximately 1 to 2 fluid ounces per pound. A 5-pound rabbit may drink 5 to 10 ounces of water daily, though consumption varies with temperature, activity level, and how much moisture is in their fresh vegetables. Fresh, clean water must be available at all times. Many rabbit owners debate between water bottles and bowls. Research suggests rabbits drink more readily from open bowls or crocks because the lapping motion is more natural than the sipper bottle mechanism. However, bowls can become contaminated with hay and droppings. A heavy ceramic crock that resists tipping is often the best compromise. In hot weather, water consumption can double, so check and refill water sources at least twice daily.
Start with the feeding guidelines on your dog food packaging (based on ideal body weight, not current weight). Adjust based on your dog's body condition score โ€” ribs should be easily felt but not visible. Active, growing, pregnant, or nursing dogs need more calories; sedentary or older dogs need less. Measure food by weight (grams) rather than volume cups for accuracy.
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.
Educational Note: This calculator is provided for educational and informational purposes. Results are based on the formulas and inputs provided. Always verify important calculations independently. NovaCalculator processes calculator inputs client-side; optional analytics follow visitor consent settings. ยฉ 2024โ€“2026 NovaCalculator.

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Formula

Daily Pellets (oz) = Weight (lbs) x Rate per lb x Activity x Modifiers

Base pellet rate varies by age: 0.25 oz/lb for adults, 0.4 oz/lb for juveniles, 0.5 oz/lb for babies. Hay should be unlimited (body-size bundle daily). Vegetables: 0.2 cups/lb for adults. Adjust for activity level and pregnancy/nursing.

Worked Examples

Example 1: Single Adult Rabbit (5 lbs)

Problem: Calculate daily food amounts for a 5-pound adult rabbit with moderate activity level.

Solution: Pellets: 5 lbs x 0.25 oz/lb = 1.25 oz/day (~1/4 cup)\nHay: Body-size bundle, approximately 5 oz/day (unlimited ideal)\nVegetables: 5 lbs x 0.2 cups/lb = 1.0 cup/day of leafy greens\nWater: 5 lbs x 2 oz/lb = 10 oz/day minimum

Result: Daily: 1.25 oz pellets, unlimited hay, 1 cup veggies, 10 oz water

Example 2: Two Juvenile Rabbits (3 lbs each)

Problem: Calculate monthly food needs for two 3-pound juvenile rabbits (3-7 months old).

Solution: Per rabbit daily: Pellets 3 x 0.4 = 1.2 oz, Hay 3 x 1.2 = 3.6 oz, Veggies 3 x 0.1 = 0.3 cups\nMonthly per rabbit: Pellets 36 oz, Hay ~6.75 lbs, Veggies 9 cups\nTotal for 2: Pellets 72 oz, Hay ~13.5 lbs, Veggies 18 cups\nEstimated monthly cost: ~$35

Result: Monthly for 2: 72 oz pellets, 13.5 lbs hay, 18 cups veggies (~$35/month)

Frequently Asked Questions

How much hay should a rabbit eat daily?

Hay should make up approximately 80 percent of a rabbit's diet and should be available unlimited at all times. A healthy adult rabbit typically eats a bundle of hay roughly equal to its own body size every day. Timothy hay is the most recommended variety for adult rabbits because of its high fiber content and balanced calcium levels. For young rabbits under 7 months, alfalfa hay can be offered as it provides extra protein and calcium needed for growth. Orchard grass, meadow hay, and oat hay are excellent alternatives or supplements to timothy. The constant chewing of hay is essential for proper dental health because rabbit teeth grow continuously at a rate of about 2 to 3 millimeters per week and need fibrous material to wear down naturally.

How many pellets should I feed my rabbit?

Adult rabbits should receive approximately one-quarter cup of high-quality timothy-based pellets per 5 pounds of body weight per day. Overfeeding pellets is one of the most common rabbit diet mistakes because it leads to obesity and reduces hay consumption. For baby rabbits under 12 weeks, pellets can be offered in unlimited quantities along with unlimited alfalfa hay to support rapid growth. From 12 weeks to 7 months, gradually reduce pellet portions while increasing hay availability. Choose pellets that are plain without added dried fruits, seeds, or colored pieces, as these additives are high in sugar and fat. Quality pellets should contain at least 18 percent fiber, no more than 14 percent protein, and less than 2 percent fat for adult maintenance.

How does a rabbit's age affect its dietary needs?

Rabbit dietary needs change significantly across their life stages. Baby rabbits from birth to 12 weeks should have unlimited access to their mother's milk, alfalfa hay, and alfalfa-based pellets. From 12 weeks to 7 months, continue alfalfa but begin introducing timothy hay and small amounts of vegetables one at a time. At 7 months, transition fully to timothy hay, reduce pellets to one-quarter cup per 5 pounds of body weight, and increase vegetable variety. Adult rabbits from 1 to 5 years maintain this balanced diet of mostly hay with measured pellets and fresh vegetables. Senior rabbits over 5 years may need calorie adjustments if they become less active, and some may benefit from slightly increased pellets if they have difficulty maintaining weight.

How much water does a rabbit need each day?

A rabbit typically drinks about 50 to 150 milliliters of water per kilogram of body weight daily, which translates to approximately 1 to 2 fluid ounces per pound. A 5-pound rabbit may drink 5 to 10 ounces of water daily, though consumption varies with temperature, activity level, and how much moisture is in their fresh vegetables. Fresh, clean water must be available at all times. Many rabbit owners debate between water bottles and bowls. Research suggests rabbits drink more readily from open bowls or crocks because the lapping motion is more natural than the sipper bottle mechanism. However, bowls can become contaminated with hay and droppings. A heavy ceramic crock that resists tipping is often the best compromise. In hot weather, water consumption can double, so check and refill water sources at least twice daily.

How do I calculate the right amount of food for my dog?

Start with the feeding guidelines on your dog food packaging (based on ideal body weight, not current weight). Adjust based on your dog's body condition score โ€” ribs should be easily felt but not visible. Active, growing, pregnant, or nursing dogs need more calories; sedentary or older dogs need less. Measure food by weight (grams) rather than volume cups for accuracy.

Is my data stored or sent to a server?

No. All calculations run entirely in your browser using JavaScript. No data you enter is ever transmitted to any server or stored anywhere. Your inputs remain completely private.

References

Reviewed by Daniel Agrici, Founder & Lead Developer ยท Editorial policy