Why use this calculator
Knowing your pasture's carrying capacity prevents overgrazing, which degrades land and reduces long-term productivity. This calculator uses Dry Sheep Equivalents (DSE) to standardise stocking rates across different livestock types, helping you match animal numbers to available feed resources.
How to use it
Enter your total pasture area in hectares, select the pasture quality rating, choose your animal type, and enter the average animal weight. The calculator converts pasture capacity into head counts based on DSE ratings for each species.
The formula
Total DSE = DSE/ha (by quality) x Pasture Area. Head Capacity = Total DSE / DSE per animal. DSE per animal: cattle = 9, sheep = 1, goats = 1.5. Quality ratings: excellent = 15 DSE/ha, good = 10, fair = 6, poor = 3.
Worked examples
100 hectares of good quality pasture for cattle
Total DSE of 1,000; capacity of approximately 111 head of cattle
50 hectares of fair quality pasture for sheep
Total DSE of 300; capacity of 300 head of sheep
When people use it
- Planning livestock purchases based on available grazing land
- Preventing overgrazing and pasture degradation
- Comparing carrying capacity across different paddocks
- Adjusting stock numbers seasonally based on pasture condition
Tips
- Reassess pasture quality ratings seasonally as conditions change with rainfall and temperature
- Reduce stocking rates by 20-30% during drought to protect pasture recovery
- Rotational grazing can effectively increase carrying capacity by 20-40%
- Consider supplementary feeding when pasture quality drops below fair
Questions people ask
- What is a Dry Sheep Equivalent (DSE)?
- A DSE is a standard unit used to compare the feed requirements of different livestock classes. One DSE equals the daily feed requirement of a 50kg dry (non-lactating) ewe, approximately 1kg of dry matter per day. Cattle typically rate at 8-10 DSE depending on size and condition.
- How do I assess my pasture quality?
- Pasture quality considers species composition, ground cover percentage, and feed availability. Excellent pastures have dense, productive improved species with over 90% ground cover. Poor pastures have sparse native grasses, significant bare ground, or weed infestation.
- Should I stock to full capacity?
- It is generally recommended to stock at 70-80% of calculated capacity to allow a buffer for seasonal variation, drought events, and pasture recovery periods.