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Free dog weight calculator and puppy growth estimator. Enter age in weeks, current weight, and breed size (toy, medium, large, giant) to project adult dog weight in lb or kg — useful for crates, food, and vet check-ins.
Last updated: May 24, 2026
Adult feeding calories? Dog calorie calculator
Unit: lbs
Estimated adult weight
48.8 lbs
≈ 22.1 kg · 48.8 lb
(15.0 lb ÷ 16 wk) × 52 ≈ 48.8 lb adult ( Medium curve, mature ~52 wk ).
Estimate only — confirm growth with your veterinarian and monthly weigh-ins.
48.8 lb
16 wk · 15 lb · medium (default)
0.94 lb/wk
31% of 52-week curve
1146 kcal
MER at projected 49 lb neutered
Default medium
48.8 lb
Toy 12 wk / 8 lb
26.7 lb
Rescue 16 wk / 18 lb
58.5 lb
Giant 20 wk / 45 lb
146.3 lb
Weekly rate = current weight ÷ age (weeks)
Adult estimate ≈ weekly rate × multiplier (breed size)
Projected adult weight ≈ (current weight ÷ age in weeks) × breed-size multiplier (weeks-to-maturity proxy). If age ≥ mature weeks for size class, current weight is used as adult estimate.
| Category | Mature weeks | Multiplier | Typical adult | Examples |
|---|---|---|---|---|
| Toy / small | 40 wk (9–12 months) | ×40 | 5–25 lb · 2–11 kg | Chihuahua, Maltese, terriers |
| Medium | 52 wk (12–15 months) | ×52 | 25–60 lb · 11–27 kg | Beagle, spaniel, bulldog |
| Large | 70 wk (15–18 months) | ×57.2 | 60–100 lb · 27–45 kg | Labrador, shepherd, boxer |
| Giant | 104 wk (18–24+ months) | ×65 | 100–200+ lb · 45–90+ kg | Great Dane, mastiff, St. Bernard |
48.8 lb
22.1 kg · 0.94 lb/wk proxy
26.7 lb
12.1 kg · 0.67 lb/wk proxy
146.3 lb
66.3 kg · 2.25 lb/wk proxy
Help someone planning crate size and food before their rescue pup finishes growing.