Oryctolagus cuniculus • 2+ Tools
Rabbits Calculators & Tools
Easy calculators for pet bunnies and rabbit breeders. Check healthy adult breed weights, calculate daily hay and pellet portions, and track 31-day kindling due dates.
All Rabbits Calculators (2)
Select a verified tool to calculate nutritional requirements, body mass estimates, growth curves, or reproductive timelines.
weight-growthv1.0
Rabbit Breed Size & Ideal Weight Calculator
Compares your rabbit's scale weight against ARBA breed standard adult weight classifications.
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pregnancyv1.2.0
Rabbit Pregnancy & Kindling Due Date Calculator
Computes estimated kindling due date and nest box setup deadlines for pregnant does.
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Scientific & Biological Overview
Bunnies need unlimited fresh grass hay—like Timothy or orchard grass—every single day. Hay makes up at least 80% to 85% of a healthy rabbit’s diet, keeping their digestion running and naturally grinding down teeth that grow continuously.
Frequently Asked Questions
How long is a rabbit pregnant?
Mother rabbits (does) have an average pregnancy of 31 days, typically giving birth between days 28 and 33. Set up a cozy nesting box by day 28.
Why is grass hay so essential for pet rabbits?
Coarse grass hay keeps a rabbit’s delicate digestive system moving constantly and provides the chewing texture needed to wear down teeth that grow 2 to 3 millimeters every week.
What are the warning signs of Gastrointestinal (GI) Stasis in rabbits?
If your bunny stops eating, produces no fecal pellets for 8 to 12 hours, sits hunched in a corner, or grinds their teeth in pain, treat it as a medical emergency and see an exotic vet immediately.