Farming & Agriculture calculators
Livestock, crop yield, soil pH, fencing, spray rates, hay/silage, and paddock tools
19 calculators
Agricultural decisions are made against weather, prices and time you cannot recover, so the arithmetic underneath them should at least be reliable. These tools cover the recurring paddock calculations: carrying capacity in dry sheep equivalents, feed budgets through a dry spell, chemical mixing rates per tank, fertiliser product needed for a nutrient target, yield estimates before harvest, tank and dam volumes, and fencing material counts.
They are written around Australian units and practice, hectares, tonnes, DSE, litres per hectare, rather than converted from northern hemisphere defaults. Chemical rates in particular are a starting point only: the registered label rate for your product and situation always overrides a calculator.
Start with these in Farming & Agriculture
Stocking Rate CalculatorWork out a safe stocking rate and carrying capacity in Dry Sheep Equivalents from growing season rainfall, pasture type and the class of stock you run.Farming & AgricultureHay & Silage Feed CalculatorBudget hay or silage for a feeding period: tonnes needed including wastage, bale numbers, bales per head, total cost and cost per head per day.Farming & AgricultureSpray Dilution CalculatorWork out how much chemical goes in each tank fill, how many fills a paddock takes, the part-tank mix for the last fill and the total product to buy.Farming & AgricultureFertiliser Application CalculatorTurn a soil test nutrient target in kilograms per hectare into a product rate, a spreader plan and a cost, using the elemental N-P-K-S analyses printed on Australian fertiliser labels.Farming & AgricultureWater Tank & Dam Volume CalculatorCalculate the volume of a round tank, rectangular tank or farm dam with sloped batters in litres, kilolitres and megalitres, plus days of supply at your daily draw.Farming & AgricultureCost Per Hectare CalculatorAdd up cropping input costs per hectare, then see the break-even yield at your grain price, the break-even price at your expected yield and the gross margin.Farming & Agriculture
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Every Farming & Agriculture calculator
19 calculators
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- Cost Per Hectare CalculatorAdd up cropping input costs per hectare, then see the break-even yield at your grain price, the break-even price at your expected yield and the gross margin.
- Crop Rotation Nitrogen Credit CalculatorWork out the nitrogen a legume break crop leaves behind, the urea still needed for the following crop, and what the rotation saves in fertiliser.
- Crop Yield EstimatorEstimate total production, gross income and gross margin per hectare for a grain crop, then find the break-even yield and cost of production per tonne that tell you whether the paddock pays.
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- Fencing Materials CalculatorEstimate strainer assemblies, line posts, wire length, wire rolls and materials cost for a paddock boundary or a straight fence run.
- Fertiliser Application CalculatorTurn a soil test nutrient target in kilograms per hectare into a product rate, a spreader plan and a cost, using the elemental N-P-K-S analyses printed on Australian fertiliser labels.
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- Harvest Yield EstimatorEstimate standing grain yield from head counts, grains per head and thousand grain weight, then adjust for harvest loss, receival moisture and test weight.
- Hay & Silage Feed CalculatorBudget hay or silage for a feeding period: tonnes needed including wastage, bale numbers, bales per head, total cost and cost per head per day.
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- Livestock Feed CalculatorBuild a supplementary or drought feed budget for a mob: dry matter intake, as fed kilograms per head per day, tonnes for the whole feeding period, bales required and the cost per head per day.
- Livestock Gestation CalculatorWork out expected birth dates and the normal calving, lambing or farrowing window for cattle, sheep, goats, pigs, horses and alpacas from the joining date.
- Livestock Weight Gain CalculatorWork out average daily gain, feed required, feed conversion and the true cost per kilogram of liveweight gain for cattle, sheep or pigs.
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- Seed Rate CalculatorWork out the seeding rate in kilograms per hectare from your target plant density, thousand grain weight, germination and field establishment, then price the seed for the whole paddock.
- Soil pH and Lime Rate CalculatorWork out the lime rate needed to lift soil pH, adjusted for soil texture, incorporation depth, the neutralising value of the product and the pH scale your test used.
- Spray Dilution CalculatorWork out how much chemical goes in each tank fill, how many fills a paddock takes, the part-tank mix for the last fill and the total product to buy.
- Stocking Rate CalculatorWork out a safe stocking rate and carrying capacity in Dry Sheep Equivalents from growing season rainfall, pasture type and the class of stock you run.
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Questions about farming & agriculture calculators
- Is a dry sheep equivalent the same everywhere?
- The definition is standard, the energy needed to maintain a two year old, 45 kilogram wether at constant weight, but the ratings applied to other classes of stock vary with breed, frame, pregnancy, lactation and growth rate, and district benchmarks for carrying capacity vary enormously with rainfall and soil type. Use a local district guide for the carrying capacity figure and treat the calculator as the arithmetic around it.
- Can I rely on the spray dilution result?
- Use it to work out tank mixes and total product for an area, not to decide a rate. The registered label is the legal and agronomic authority for rate, water volume, adjuvants, withholding periods and conditions of use. Always cross-check the label, and where a product is rate-critical, confirm your calibration by measuring actual output rather than assuming the nozzle chart.
- How early can a yield estimate be trusted?
- Component-based estimates from head counts and grain numbers are reasonably indicative from mid grain-fill onwards, within roughly fifteen per cent in a season that finishes normally. Earlier than that, or in a season that turns dry during filling, grain weight can fall well below the assumed figure and the estimate will be optimistic. Sample several representative areas rather than one good patch.