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Rabbit Weight Calculator

PetSmall Pets, Birds and Fish

Weigh an adult rabbit (6 months or older) on a kitchen or baby scale.

Compared with breed standard —
Breed senior weight range
—
Distance outside the range
—
Weight as share of range middle
—
Weight in the other unit
—

A healthy adult rabbit's weight depends on breed. The ARBA standard puts a Holland Lop at 3–4 lb, a Mini Rex at 3.5–4.5 lb and a New Zealand at 9–12 lb. A Holland Lop weighing 4.5 lb is 0.5 lb above its range, about 129% of the range middle.

About this tool

Rabbit owners, breeders and shelter staff often want to know if a bunny's weight is normal for its type. This calculator takes the breed and a scale reading in pounds or kilograms, then places the weight against the senior (adult) range from the American Rabbit Breeders Association standard. It reports whether the rabbit is below, inside or above that range, by how much, and what share of the range middle it weighs. The ranges are show standards, not medical targets: a big-boned rabbit can sit above range and still be lean, and a mixed-breed rabbit has no standard at all. Use the result as a starting point and confirm body condition by feeling the ribs, spine and hips.

How to use it

  1. Pick the breed

    Choose the closest breed from the list; for a cross, try both parent breeds.

  2. Enter the weight

    Type the scale reading and set lb or kg in the unit box inside the field.

  3. Read the comparison

    The result shows the breed range, any distance outside it and the weight in the other unit.

Examples

Holland Lop at 4.5 lb

Breed
Holland Lop
Rabbit's weight
4.5
Unit
lb

Result Compared with breed standard: Above breed range
Breed senior weight range: 3 lb – 4 lb
Distance outside the range: +0.5 lb
Weight as share of range middle: 129%
Weight in the other unit: 2.04 kg

  1. Weight in pounds = 4.5 lb
  2. Holland Lop senior range = 3–4 lb, middle 3.5 lb
  3. Share of middle = 4.5 ÷ 3.5 × 100 = 129%
  4. Result: above breed range

The ARBA cap for a Holland Lop is 4 lb, so this rabbit sits half a pound above its breed range.

Netherland Dwarf at 1 kg

Breed
Netherland Dwarf
Rabbit's weight
1
Unit
kg

Result Compared with breed standard: Within breed range
Breed senior weight range: 0.91 kg – 1.13 kg
Distance outside the range: None
Weight as share of range middle: 98%
Weight in the other unit: 2.2 lb

  1. Weight in pounds = 1 kg ÷ 0.45359237 = 2.2 lb
  2. Netherland Dwarf senior range = 2–2.5 lb, middle 2.25 lb
  3. Share of middle = 2.2 ÷ 2.25 × 100 = 98%
  4. Result: within breed range

One kilogram is about 2.2 lb, which falls inside the dwarf range the ARBA standard sets.

Flemish Giant at 15 lb

Breed
Flemish Giant
Rabbit's weight
15
Unit
lb

Result Compared with breed standard: Within breed range
Breed senior weight range: 13 lb – 22 lb
Distance outside the range: None
Weight as share of range middle: 86%
Weight in the other unit: 6.8 kg

  1. Weight in pounds = 15 lb
  2. Flemish Giant senior range = 13–22 lb, middle 17.5 lb
  3. Share of middle = 15 ÷ 17.5 × 100 = 86%
  4. Result: within breed range

Giant breeds have a minimum rather than a tight cap, so 15 lb is a normal adult weight.

How it is calculated

share = weight ÷ ((low + high) ÷ 2) × 100; distance = weight − high if above, weight − low if below

weight
Rabbit's weight in pounds (kg ÷ 0.45359237)
low
Lowest senior weight for the breed, lb
high
Highest senior weight for the breed, lb

Each breed has a senior weight range taken from the ARBA Standard of Perfection; where the standard gives separate buck and doe figures, the range spans both. Kilogram entries are converted with the exact pound definition. A weight between low and high is within range; otherwise the tool reports the gap to the nearest limit. The share of the range middle shows how far from typical the rabbit is even when it is inside the range. For Flemish Giants the standard sets only a minimum, so the upper figure here is a practical ceiling.

When not to use it

  • Kits and juniors under six months are still growing and will read as underweight.
  • Pregnant or nursing does carry extra weight that is not fat.
  • Mixed-breed rabbits have no published standard to compare against.

Common mistakes

  • Weighing a rabbit inside its carrier without subtracting the carrier's weight.
  • Choosing a breed from the pet-shop label rather than the rabbit's actual build.
  • Reading a weight above range as obesity without checking body condition by touch.

Frequently asked questions

How much should a Netherland Dwarf weigh?

The ARBA standard calls for a senior Netherland Dwarf of about 2 lb with a 2.5 lb maximum, roughly 0.9 to 1.1 kg. Pet dwarfs from non-show lines often run a little heavier.

How do I weigh a rabbit at home?

Zero a kitchen or baby scale with a box or towel on it, then place the rabbit in it. Weigh at the same time of day each week, since a full gut can add a few ounces.

My rabbit is above the breed range. Is it overweight?

Not necessarily. Run a hand along the ribs and spine: you should feel them under a thin layer of flesh without pressing. A rabbit with a soft roll over the ribs or a heavy dewlap on a buck is likely carrying fat, whatever the scale says.

At what age does a rabbit reach adult weight?

Small breeds reach senior size around 6 months, while medium and giant breeds such as New Zealand or Flemish Giant can keep filling out until 8 to 12 months.

Why is the Flemish Giant range so wide?

The ARBA standard sets a minimum senior weight of 13 lb for bucks and 14 lb for does but no maximum. The 22 lb ceiling here is a practical figure for well-built adults, not part of the standard.

Does the range differ for bucks and does?

In several breeds does are allowed slightly more weight than bucks. The ranges here span both sexes, so a doe near the top of the range is still typical.