Farming & agriculture
Grazing paddock area Calculator
Estimate grazing allocation from herd demand and removable cover. This free grazing paddock area calculator shows the calculation and its assumptions so you can compare your own figures.
Your results
Estimate grazing allocation from herd demand and removable cover.
Calculated outcomes
- Daily Herd Demand Kg DM
- 1,200 kg DM
- Usable Grass Kg DMHa
- 1,020 kg DM/ha
- Daily Area Ha
- 1.176 ha
Assumptions and estimates
- Method: Usable grass = (entry cover − residual cover) × utilisation. Daily area = herd demand ÷ usable grass/ha.
- Cover readings must use the same calibrated basis. Excludes growth during grazing and rotation, supplementation, soil trafficability and animal nutritional constraints.
Useful next steps
- Use Compare options to test an alternative side by side.
- Copy, print or download a record of this calculation when you need one.
Reports open your email app addressed to s@s1.ie with the public page address only. Your inputs are never added.
How the grazing paddock area calculation works
Usable grass = (entry cover − residual cover) × utilisation. Daily area = herd demand ÷ usable grass/ha.
Cover readings must use the same calibrated basis. Excludes growth during grazing and rotation, supplementation, soil trafficability and animal nutritional constraints.
Using this calculator
- Enter your own figures in the labelled inputs. Keep the currencies, units and time periods consistent.
- Choose any applicable rate profile, pattern or assumption shown for this tool. Open additional inputs when relevant.
- Review paddock area ha and rotation area ha, then read the stated assumptions and eligibility conditions before using the result.
Worked example
This is a static example using illustrative inputs, not facts about you or today’s date. The displayed eligibility selections and assumptions apply only to this example.
See example inputs
- Animals
- 80
- Grass dry matter per animal per day (kg)
- 15
- Entry cover (kg DM/ha)
- 1600
- Residual cover on same measurement basis (kg DM/ha)
- 400
- Utilisation of removable cover (%)
- 85
- Days in paddock
- 2
- Planned rotation length (days)
- 21
- Paddock Area Ha
- 2.353 ha
- Rotation Area Ha
- 24.706 ha