French Bulldog
French Bulldog Growth Chart: What to Expect Month by Month
Typical French Bulldog weights and heights from one week to a year, when growth finishes, and why the chart matters less than what you can feel over the ribs.
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The question every new owner asks is how big the puppy will get. For a French Bulldog the honest answer is that the range is narrow, the finish line comes early, and the chart below will tell you roughly where you are without telling you much you can act on.
A word on where these numbers come from. There is no published growth study for this breed. Charts like this one, ours included, are compiled from breeder and owner reports, so treat them as a rough guide rather than a standard your puppy ought to meet. A puppy consistently outside the range isn’t necessarily a problem, and one inside it isn’t necessarily healthy.
Weight, week by week
| Age | Typical weight |
|---|---|
| 1 week | 1.2 – 2.2 lb |
| 4 weeks | 2 – 4.2 lb |
| 8 weeks | 5 – 6.9 lb |
| 3 months | 6.9 – 9 lb |
| 4 months | 9 – 12 lb |
| 4.5 months | 12 – 15 lb |
| 5.5 months | 15 – 16 lb |
| 6.5 months | 16 – 18 lb |
| 12 months | 17 – 23 lb |
Growth slows noticeably after about six and a half months. Most Frenchies are close to their adult weight by a year, though some fill out into their second year.
The number that actually matters is the ceiling: the breed standard says a French Bulldog must not weigh more than 28 pounds (AKC). Most adults sit between about 18 and 28.
Males usually weigh more than females, mostly in head and muscle, and the two are much the same height.
Weighing at home: stand on the bathroom scale, then again holding the dog, and subtract. Easier than persuading a Frenchie to sit on a scale.
Height, by age
Height is measured from the ground to the top of the shoulder blades.
| Age | Typical height |
|---|---|
| 3 months | 5 – 6 in |
| 6 months | 7 – 9 in |
| 9 months | 10 – 11 in |
| 1 year | 11 – 12 in |
Most are as tall as they will get between nine and twelve months. The breed standard sets no height at all, only weight, so height figures are convention rather than a requirement.
When is a Frenchie full grown?
- Height: about 9 to 12 months.
- Weight: about 9 to 15 months, with the last of it going on slowly.
- Head and chest: these keep broadening for a while after the dog stops getting taller, which is why a two-year-old looks more substantial than a one-year-old at the same height.
Can you predict the adult size?
Two rules of thumb get passed around, and both are rougher than they sound:
- Four fold: weight at 8 weeks × 4.
- Double up: weight at 4 months × 2.
They were devised for medium-sized dogs and they’ll get you within a few pounds for a Frenchie, which is about as much as any formula can do. The better predictors are the parents: ask the breeder what both weigh, and where your puppy sits among its littermates. Our breeder questions guide covers what else to ask, and our mini French Bulldog guide covers what’s being sold when a puppy is advertised as unusually small.
If you’ve adopted rather than bought, you often won’t know the parents at all; our rescue guide covers what a rescue can and can’t tell you.
What affects how big they get
Genetics sets the range. Nothing you do at home moves a dog far outside what its parents gave it.
Food determines where in that range they land, and whether the weight is muscle or fat. Measure meals rather than free-feeding, and keep treats inside 10% of daily calories. Our food guide covers the diet.
Exercise matters for condition rather than size. Frenchies don’t need much, and long walks in warm weather are a genuine risk for a flat-faced breed (PDSA). Short walks in the cool part of the day plus play indoors suits them; our guide to playing with your French Bulldog covers the alternatives.
Health. Anything painful or long-running can slow growth or stall weight gain, and a puppy that stops eating, loses weight, or seems flat is a call to the vet rather than a reason to switch foods.
Is my puppy the right weight?
Use your hands rather than the chart. Run your fingers over the ribs: you should feel them easily under a thin layer, without seeing them standing out. Look down from above for a visible waist, and from the side for a tummy that tucks up rather than running straight back. That’s body condition scoring, and it’s what vets use (WSAVA).
It matters more in this breed than most, because excess weight makes breathing harder in a dog already short of airway. Our weight guide covers scoring properly, what to do if your dog is carrying too much, and what to do if they’re too thin.
The short version
Expect roughly 5 to 7 pounds at eight weeks, 16 to 18 by six and a half months, and 18 to 28 as an adult, standing about a foot at the shoulder. Growth is mostly finished by a year. And once they’re grown, stop weighing and start feeling: what you can feel over the ribs tells you more than any chart.