Sheep • weight-growthVerified Scientific Formula
Sheep & Lamb Weight Calculator
Calculates sheep and lamb body mass in pounds or kilograms from heart girth and body length measurements.
Enter Parameters
Calculated Output
Estimated Sheep Body Weight
122.5lbs55.6 kg
What This Result Means
Estimated sheep body weight is ~122.5 lbs.
Calculation Details & Practical Equivalents
Daily Dry Matter Intake (~3% BW)
3.7 lbs/day
Daily Water Requirement
9.8 quarts
Formula & Mathematical Methodology
Standard Mathematical Formula
Weight (lbs) = [Heart Girth (in)]² × [Body Length (in)] ÷ 300
Formula Variables Defined
GirthHeart Girth(inches (or cm))
Circumference directly behind front legs
LengthBody Length(inches (or cm))
From shoulder to pin bone
Step-by-Step Calculation Example
Example: 34 in Girth, 28 in Length Lamb
- 34 × 34 = 1,156
- 1,156 × 28 = 32,368
- 32,368 ÷ 300 = 107.9 lbs (~49 kg)
Final Output: 107.9 lbs (49 kg)
Key Assumptions
- Fleece compressed flat during tape measurement.
Biological Limitations
Verified Scientific & Veterinary Sources
Version: 1.0•Methodology Reviewed: 2026-01-20
1. Nutrient Requirements of Small Ruminants: Sheep, Goats, Cervids, and New World Camelidstextbook
National Research Council (NRC) Committee on Nutrient Requirements of Small Ruminants (2007). National Academies Press, Washington, D.C.
Sheep & Lamb Weight Calculator — FAQs
Pull the measuring tape snug through the wool so it contacts the skin firmly at the girth circumference.
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