Livestock Feed Calculator
Calculate the total feed required for a herd over a chosen feeding period by entering animal numbers, daily intake, and days. Useful for budgeting feed purchases and planning storage before the feeding season.
About this calculator
Managing feed supply is one of the largest controllable costs in livestock farming. The formula is: Total Feed = numberOfAnimals × feedPerAnimal × feedingPeriod. The number of animals is expressed in head, feed per animal in kilograms per day (kg/day), and the feeding period in days. Multiplying these three values gives total feed in kilograms over the entire period. Daily feed allowances vary significantly by species and production stage: a 500 kg beef steer in a feedlot might consume 8–10 kg of dry matter per day, while a 60 kg ewe in late pregnancy may require 2–2.5 kg/day. Using accurate per-head intake figures — ideally based on live weight and production stage — makes this calculation reliable for procurement and storage planning. Always add a contingency of 5–10% on top of the calculated total for spoilage and handling losses.
How to use
You are feeding 150 beef cattle at 8.5 kg of feed per animal per day over a 90-day finishing period. Enter 150 for Number of Animals, 8.5 for Feed per Animal, and 90 for Feeding Period. The calculator computes: Total Feed = 150 × 8.5 × 90 = 114,750 kg, or approximately 114.75 metric tons. This is the total feed you must source, purchase, and store before the feeding period begins. Adding a 7% spoilage contingency: 114,750 × 1.07 = 122,782 kg — round up to 123 metric tons for your purchase order.
Frequently asked questions
How do I determine the correct daily feed amount per animal for my livestock?
Daily feed allowances depend on the animal's live weight, species, breed, age, and production stage — whether it is growing, lactating, pregnant, or being finished for slaughter. A common rule of thumb is that cattle consume dry matter equivalent to 2–3% of their body weight per day, while sheep consume around 3–4%. Your feed supplier or a livestock nutritionist can provide ration sheets tailored to your animals' production targets and the specific feed products you are using. Weighing animals and monitoring body condition scores regularly ensures intake figures remain accurate as animals grow or production stages change.
Why should I calculate total feed requirements before the feeding period starts?
Pre-calculating your total feed requirement allows you to purchase in bulk at better prices and avoid the premium cost of emergency re-orders mid-feeding period. It also ensures you have adequate storage infrastructure — silos, sheds, or bunker space — to receive and protect the full volume before it is needed. Running out of feed mid-period forces animals onto restricted rations, which disrupts growth rates, reduces feed conversion efficiency, and can result in significant production losses. Having the calculation done well in advance also allows time to source alternative feeds if your primary supply is unavailable or priced too high.
Can this livestock feed calculator be used for poultry and pigs as well as cattle and sheep?
Yes, the formula applies to any livestock species as long as you use accurate daily feed intake figures for the specific animals you are managing. Broiler chickens might consume 100–150 grams per bird per day, so you would enter the feed rate in kg (e.g., 0.12 kg/day) and ensure your animal count reflects the total number of birds. Pigs in a grow-finish phase typically consume 1.8–2.5 kg/day depending on weight and diet composition. The key is using species- and stage-specific intake data from your feed supplier or nutritionist rather than generic averages, as variation between production systems can be substantial.