Pasture Stocking Rate Calculator
Fill in the values and the answer updates as you type.
How the Pasture Stocking Rate Calculator works
Available forage = area × forage per acre × the share that animals may graze. The rest is left to protect the plants and soil, which is why the common take-half-leave-half rule uses 50%. Forage needed per animal = animal weight × daily intake share × grazing days. Dividing the first by the second gives the number of animals. Forage yield changes with rain, species, and fertility, so measure or ask your local extension service, and adjust the number in dry years. Example: with Pasture area 80 acres, Forage produced per acre 3000 lb dry matter, Share of forage animals may graze 50 %, Grazing days 150, Average animal weight 1000 lb, and Daily intake 2.5 % of body weight, the result is Animals the pasture can carry = 32; Unrounded number of animals = 32; Forage available to graze (lb) = 120,000.
Inputs and results
The Pasture Stocking Rate Calculator takes 6 inputs and gives 6 results.
What you enter
- Pasture area (acres) — starts at 80.
- Forage produced per acre (lb dry matter) — starts at 3000.
- Share of forage animals may graze (%) — starts at 50.
- Grazing days — starts at 150.
- Average animal weight (lb) — starts at 1000.
- Daily intake (% of body weight) — starts at 2.5.
What you get
- Animals the pasture can carry
- Unrounded number of animals
- Forage available to graze (lb)
- Forage needed per animal (lb)
- Acres per animal
- Animal units (1,000 lb each)
Example: Pasture Stocking Rate Calculator with the starting values
With pasture area 80 acres, forage produced per acre 3000 lb dry matter, share of forage animals may graze 50 %, grazing days 150 and average animal weight 1000 lb, the calculator returns:
| Animals the pasture can carry | 32 |
|---|---|
| Unrounded number of animals | 32 |
| Forage available to graze (lb) | 120,000 |
| Forage needed per animal (lb) | 3,750 |
| Acres per animal | 2.5 |
| Animal units (1,000 lb each) | 32 |
Change any value above and the results update straight away.
Pasture Stocking Rate Calculator FAQ
How do I use the Pasture Stocking Rate Calculator?
Enter pasture area, forage produced per acre, share of forage animals may graze and grazing days in the fields, then read animals the pasture can carry, unrounded number of animals, forage available to graze (lb) and forage needed per animal (lb) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Pasture Stocking Rate Calculator calculate?
How many animals a pasture can carry for a grazing season. It returns animals the pasture can carry, unrounded number of animals, forage available to graze (lb) and forage needed per animal (lb) from the 6 values you provide.
What values does the Pasture Stocking Rate Calculator start with?
It opens with pasture area 80 acres, forage produced per acre 3000 lb dry matter, share of forage animals may graze 50 % and grazing days 150 so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Pasture Stocking Rate Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Pasture Stocking Rate Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.