Cattle • weight-growthVerified Scientific Formula
Cattle Weight Calculator (Shaeffer's Equation)
Calculates beef and dairy cattle body weight in pounds or kilograms from heart girth and body length measurements.
Enter Parameters
Calculated Output
Estimated Cattle Body Weight
1,219lbs553 kg
Estimated Expected Range: 1,158 – 1,280 lbs
What This Result Means
Estimated cattle weight is approximately 1,219 lbs based on Shaeffer's standard morphometric equation.
Calculation Details & Practical Equivalents
Estimated Dry Matter Intake (~2.2% BW)
26.8 lbs/day
Daily Water Intake (Moderate Weather)
15 gallons/day
Formula & Mathematical Methodology
Standard Mathematical Formula
Weight (lbs) = [Heart Girth (in)]² × [Body Length (in)] ÷ 300 | Weight (kg) = [Girth (cm)]² × [Length (cm)] ÷ 10800
Formula Variables Defined
GirthHeart Girth Circumference(inches (or cm))
Circumference directly behind shoulders
LengthBody Length(inches (or cm))
From point of shoulder to point of pin bone
Step-by-Step Calculation Example
Example: 76 in Girth, 64 in Length
A beef steer with a 76-inch heart girth and 64-inch body length.
- 76 × 76 = 5,776
- 5,776 × 64 = 369,664
- 369,664 ÷ 300 = 1,232.2 lbs (~559 kg)
Final Output: 1,232 lbs (559 kg)
Key Assumptions
- Animal is standing squarely on level footing.
Biological Limitations
Verified Scientific & Veterinary Sources
Version: 1.0•Methodology Reviewed: 2026-01-20
1. Estimating the Weight of Beef Cattle from Body Measurementsuniversity-extension
Shaeffer, E.A. / Kansas State University Agricultural Experiment Station (1930). KSU Agricultural Extension Bulletin & USDA Circular
Cattle Weight Calculator (Shaeffer's Equation) — FAQs
Measure from the point of the shoulder (scapulo-humeral joint) straight to the pin bone (tuber ischii).