Because the Labradoodle is a cross between a Labrador Retriever and a Poodle, predicting their adult size comes down to one massive variable: What size was the Poodle parent?

Poodles come in three distinct distinct sizes (Toy, Miniature, and Standard). Because breeders mix and match these Poodles with Labradors, Labradoodles have one of the widest size spectrums in the entire canine world. You could have a 20-pound Labradoodle or an 85-pound Labradoodle.

Here is exactly what you need to know about the three different classes of Labradoodles and how to predict their growth.

💡 Key Takeaway (Bottom Line)

The adult size of a Labradoodle is calculated entirely based on their Poodle genetics and generation code (F1 vs F1b). A Standard Labradoodle will weigh 50–90 lbs, a Medium Labradoodle will weigh 30–45 lbs, and a Miniature Labradoodle will finish at 15–25 lbs. Because of immense hybrid variance, you must use their age-to-weight biological curves at exactly 16 weeks to safely determine their adult size.

1. The Standard Labradoodle

The Standard Labradoodle is the original hybrid. This is a cross between a purebred Labrador Retriever (typically 55-80 lbs) and a Standard Poodle (typically 45-70 lbs).

  • Adult Weight: 50 to 90 pounds
  • Adult Height: 22 to 24 inches at the shoulder
  • Growth Timeline: Standard Labradoodles grow very rapidly from 2 to 6 months of age. They reach their full adult height around 12 months but will continue filling out through their chest for up to 18 months.

2. The Medium Labradoodle

Medium Labradoodles are generally bred by crossing a small Labrador Retriever with a Moyen (Medium) Poodle, or by breeding two Medium Labradoodles together (Multigenerational).

  • Adult Weight: 30 to 45 pounds
  • Adult Height: 17 to 20 inches at the shoulder
  • Growth Timeline: They follow a classic medium-breed “S” curve. They will hit 50% of their adult weight right around 16 to 18 weeks of age and stop growing almost entirely by 10 months.

3. The Miniature Labradoodle

Miniature Labradoodles (Mini Doodles) are created by crossing a Labrador with a Miniature Poodle (10-15 lbs). Because of the extreme size difference, waitlists for F1 (first generation) Mini Labradoodles are notoriously long. More often, they are bred as F1b (a Labradoodle crossed back to a Mini Poodle) to stabilize their small size.

  • Adult Weight: 15 to 25 pounds
  • Adult Height: 14 to 16 inches at the shoulder
  • Growth Timeline: Small breeds grow incredibly fast out of the gate and finish early. A Mini Labradoodle will often reach its final height by 7 to 8 months of age.

The “F-Generation” Factor

When you purchase a Labradoodle, your breeder will give you a generation code. This is critical for predicting size:

  • F1: 50% Lab, 50% Poodle. Size is highly unpredictable due to “hybrid vigor.”
  • F1b (Lab-leaning): 75% Lab, 25% Poodle. Will be very large and heavy-boned.
  • F1b (Poodle-leaning): 25% Lab, 75% Poodle. Will strongly mirror the Poodle’s size and weight.
  • Multigenerational: Both parents were Labradoodles. The most predictable size and coat type.

How to Calculate Your Labradoodle’s Exact Size

Because the genetic variance is so wide, predicting a Labradoodle’s size by looking at its parents is notoriously difficult. Instead, you must use their biological growth curve.

Weigh your puppy on a sensitive scale, note their exact age in weeks, and run those numbers through our Free Labradoodle Size Calculator. Our algorithm factors in cross-breed biological constants to give you a highly accurate estimate of their final adult weight!