A beef cow measuring 70 inches around the heart girth and 78 inches long weighs roughly 1,274 lb — and you can get that number with a tape measure and one calculation. The standard cattle weight formula multiplies heart girth by itself, then by body length, and divides by 300, giving a live-weight estimate accurate to about ±5% when measurements are taken correctly (Oregon State University Extension). Use the cattle weight calculator above, or read on to learn how to calculate cattle weight yourself and what an average cow, bull or steer should weigh.
The formula the calculator uses
The number behind this cattle body weight calculator is the girth-and-length equation used by agricultural extensions for decades, sometimes called Schaeffer’s formula:
Heart girth (in) × Heart girth (in) × Body length (in) ÷ 300 = live weight (lb)
Heart girth is the circumference of the chest just behind the front legs; body length is measured from the point of the shoulder to the pin bone (the rear point of the rump). Both Washington State University Extension and Tractor Supply Co. publish the same worked example: (70 × 70 × 78) ÷ 300 = 1,274 lb. The divisor of 300 is specific to cattle — pigs use 400 and horses use 330, so a general “livestock” figure won’t be accurate for a cow. Working in centimetres and kilograms? The calculator converts your measurements internally so the same validated equation applies.
Expect the cattle live weight calculator to land within roughly 5% of a true scale weight — about 50 lb on a 1,000-lb animal. That’s close enough for medication dosing, feed planning and tracking gains, though the estimate reads high on very large bulls over about 2,000 lb, where a livestock scale is the better tool.
How much does a cow weigh? Average cattle weight
There’s no single average weight for cattle because breed, age, sex and body condition all move the number. As a working guide, a mature beef cow averages about 1,200–1,400 lb, and a mature beef bull about 1,800–2,400 lb, with bulls running roughly 55–60% heavier than cows of the same frame (Texas A&M Beef Skillathon, citing US Meat Animal Research Center data). Angus — the most common US beef breed — sits near the middle: the American Angus Association puts the average Angus cow near 1,200 lb and the average Angus bull near 1,870 lb. A finished market steer typically weighs 1,100–1,400 lb, while a newborn calf starts at just 65–90 lb.
The average weight of beef cattle has also crept upward over recent decades as genetics and nutrition have improved, so older reference figures often read light compared with today’s animals.
Average cattle weight chart by class and breed
| Class / breed | Typical live weight | Notes |
|---|---|---|
| Newborn calf | 65–90 lb (29–41 kg) | Varies by breed and dam size |
| Weaned calf (~7 months) | 450–600 lb (204–272 kg) | Depends on creep feed & genetics |
| Yearling steer | 700–900 lb (318–408 kg) | About half of mature weight |
| Finished / market steer | 1,100–1,400 lb (499–635 kg) | USDA Medium-frame ~1,100–1,250 lb |
| Mature beef cow | 1,200–1,400 lb (544–635 kg) | Moderate body condition |
| Mature beef bull | 1,800–2,400 lb (816–1,089 kg) | ~55–60% heavier than cows |
| Angus cow (average) | ~1,200 lb (544 kg) | American Angus Association |
| Angus bull (average) | ~1,870 lb (848 kg) | Range ~1,800–2,200 lb |
| Holstein dairy cow | ~1,500 lb (680 kg) | Larger frame, lighter muscling |
Estimating carcass (hanging) weight
If you’re headed to slaughter, live weight converts to carcass weight through the dressing percentage — the share of live weight that becomes hot carcass. For fed beef cattle that averages about 63%, within a 60–64% range (University of Nebraska–Lincoln; Mississippi State University Extension). Grass-finished and dairy animals dress lower (about 58–60%); well-finished cattle can reach 62–65%. The calculator’s carcass estimate multiplies live weight by your chosen dressing percentage — for a 1,200-lb steer at 63%, that’s about 756 lb hanging. Remember the take-home meat in your freezer is smaller still, since carcass weight includes bone, fat and moisture lost in cutting and chilling.
How to use the cattle weight calculator
- Stand the animal square on level ground, head up in a natural position.
- Wrap a flexible tape snugly around the chest, right behind the front legs, and read the heart girth.
- Measure body length from the point of the shoulder to the pin bone.
- Enter both figures (switch to cm/kg if you prefer). The estimated live weight, a ±5% range and a kilogram conversion appear instantly.
- Open Carcass & weight-gain options to set a dressing percentage for hanging weight, or enter a previous weight and days to get average daily gain — turning this into a quick cattle weight gain calculator.
No tape? A length of baler twine marked with a pen and then held against a ruler works fine — the same method a physical weight tape or a cattle weight calculator app relies on.
BarnCalc · Cattle
Cattle Weight Calculator
Estimate a cow, bull, steer or calf's live weight from two tape measurements — no scale needed.
Circumference just behind the front legs.
Point of shoulder to pin bone.
Sets a typical dressing % for the carcass estimate.
Estimated live weight
—
Carcass & weight-gain options
Fed beef ~63% • dairy/lean ~59%.
For average daily gain.
e.g. 60
Average cattle weights (reference chart)
| Class / breed | Typical live weight |
|---|---|
| Newborn calf | 65–90 lb (29–41 kg) |
| Weaned calf (~7 mo) | 450–600 lb (204–272 kg) |
| Yearling steer | 700–900 lb (318–408 kg) |
| Finished / market steer | 1,100–1,400 lb (499–635 kg) |
| Mature beef cow | 1,200–1,400 lb (544–635 kg) |
| Mature beef bull | 1,800–2,400 lb (816–1,089 kg) |
| Angus cow (average) | ~1,200 lb (544 kg) |
| Angus bull (average) | ~1,870 lb (848 kg) |
| Holstein dairy cow | ~1,500 lb (680 kg) |
Frequently asked questions
How do you calculate cattle weight without a scale?
Measure heart girth and body length in inches, then apply heart girth × heart girth × body length ÷ 300 to get pounds. A 75-inch girth and 60-inch length estimates roughly 1,125 lb. The result is usually within about 5% of a scale weight.
How accurate is the cattle weight calculator?
Around ±5% — about 50 lb on a 1,000-lb animal — when the tape is snug and the animal stands square. Accuracy slips on very large bulls and on lighter-muscled dairy frames, so use a scale when exact weights matter.
What is the average weight of beef cattle?
Mature beef cows average roughly 1,200–1,400 lb and mature bulls 1,800–2,400 lb. Finished market steers usually run 1,100–1,400 lb, depending on breed and frame size.
How much does an Angus cow or bull weigh?
An average Angus cow weighs about 1,200 lb and an average Angus bull about 1,870 lb, with bulls commonly ranging 1,800–2,200 lb at maturity.
How do I work out cattle carcass weight?
Multiply live weight by the dressing percentage. Fed beef cattle average about 63%, so a 1,200-lb steer yields roughly a 756-lb hot carcass. Dairy and grass-finished cattle dress lower.
Can I use this as a cattle weight gain calculator?
Yes. Estimate the animal’s weight today, then enter a previous weight and the number of days between measurements in the advanced options to see average daily gain.
Sources
- Oregon State University Extension — Weight Calculator (heart girth & body length): extension.oregonstate.edu
- Washington State University Extension (Ferry County) — Heart Girth and Weight: extension.wsu.edu
- Tractor Supply Co. — How to Calculate Cattle Weight: tractorsupply.com
- University of Nebraska–Lincoln, UNL Beef — Pounds of Meat from a Beef Animal (dressing %): beef.unl.edu
- Mississippi State University Extension — How Much Meat to Expect from a Beef Animal: extension.msstate.edu
- Texas A&M Beef Skillathon — Frame Score, Frame Size and Weight: beefskillathon.tamu.edu
Reviewed for accuracy against Oregon State University Extension, Washington State University Extension, and University of Nebraska–Lincoln (UNL Beef) publications.
Last updated: July 12, 2026.
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