# Agriculture calculators

> Farm calculators for seed rate, plants per area, fertilizer quantity, spray dilution, irrigation water, yield and land units.

Page: https://calculators.geekmidst.com/categories/agriculture

- [Seed Rate Calculator](https://calculators.geekmidst.com/calculators/seed-quantity-per-acre-calculator.md): Work out how much seed to buy for a field, either from a recommended seed rate or from target plant population, seed weight and germination.
- [Plant Population Calculator](https://calculators.geekmidst.com/calculators/plant-population-calculator.md): Count plants per acre, per hectare and per square metre from row spacing and in-row plant spacing, and the total for your field.
- [Plant Spacing Calculator](https://calculators.geekmidst.com/calculators/plant-spacing-calculator.md): Find the plant-to-plant spacing that gives a target population per hectare, acre or m², for fixed rows, square or triangular planting.
- [Fertiliser NPK Calculator](https://calculators.geekmidst.com/calculators/fertilizer-npk-blend-calculator.md): Turn an N:P₂O₅:K₂O dose into kilograms of nitrogen, phosphate and potash fertiliser (such as urea, DAP and MOP), allowing for the N in DAP.
- [Fertiliser Application Rate Calculator](https://calculators.geekmidst.com/calculators/fertilizer-application-rate-calculator.md): Convert a nutrient rate (kg/ha or lb/acre) into the amount of fertiliser product per hectare, per acre and for the whole field, with bag count.
- [Drip Irrigation Discharge Calculator](https://calculators.geekmidst.com/calculators/drip-irrigation-discharge-calculator.md): Work out the number of drippers, total system discharge, the application rate in mm per hour and how long to run a drip system to apply a given depth.
- [Irrigation Scheduling Calculator](https://calculators.geekmidst.com/calculators/irrigation-scheduling-calculator.md): Estimate how often to irrigate and how much water to apply from ET₀, crop coefficient, soil water holding and root depth, using the FAO-56 method.
- [Soil Water Deficit Calculator](https://calculators.geekmidst.com/calculators/soil-water-deficit-calculator.md): Find how many millimetres of water the root zone needs to return to field capacity from a soil moisture reading, and how depleted it is.
- [Crop Yield per Acre Calculator](https://calculators.geekmidst.com/calculators/crop-yield-per-acre-calculator.md): Turn a harvested weight and field area into yield per acre and per hectare in kg, quintals, pounds, bushels and tonnes, with optional moisture adjustment.
- [Harvest Revenue Calculator](https://calculators.geekmidst.com/calculators/harvest-revenue-calculator.md): Estimate crop sales income from yield per acre or hectare, area, price, post-harvest losses, selling costs and other income such as straw.
- [Farm Gross Margin Calculator](https://calculators.geekmidst.com/calculators/farm-gross-margin-calculator.md): Calculate a crop enterprise’s gross margin: output value minus variable costs (seed, fertiliser, sprays, fuel, labour), per acre, per hectare and in total.
- [Pesticide Dilution Calculator](https://calculators.geekmidst.com/calculators/pesticide-dilution-calculator.md): Work out how much pesticide to add to a knapsack or tank from the label dose per litre, or from the active-ingredient strength you want (C1V1 = C2V2).
- [Sprayer Tank Mix Calculator](https://calculators.geekmidst.com/calculators/sprayer-tank-mix-calculator.md): From spray volume per acre or hectare, tank size and product rate, find how much product goes in each tank, how many loads and the final part-tank.
- [Tractor Fuel Consumption Calculator](https://calculators.geekmidst.com/calculators/tractor-fuel-consumption-calculator.md): Estimate field capacity, hours, fuel used and fuel cost for a field operation from implement width, speed, field efficiency and fuel use per hour.
- [Greenhouse Ventilation Calculator](https://calculators.geekmidst.com/calculators/greenhouse-ventilation-calculator.md): Size greenhouse exhaust fans from the house volume and the air changes per hour you want, in m³/h and CFM, and count how many fans you need.
- [Greenhouse Heating Load Calculator](https://calculators.geekmidst.com/calculators/greenhouse-heating-load-calculator.md): Estimate the heater size a greenhouse needs from its covering area, U-value, the inside–outside temperature difference and air leakage.
- [Compost Volume Calculator](https://calculators.geekmidst.com/calculators/compost-volume-calculator.md): Work out how much compost or mulch you need to cover an area to a given depth, in m³, cubic yards, litres, tonnes and bags.
- [Manure Application Rate Calculator](https://calculators.geekmidst.com/calculators/manure-application-rate-calculator.md): Find the manure or slurry rate that supplies a nutrient target, from the manure’s nutrient content and first-year availability, in t/ha, tons/acre or gal/acre.
- [Lime Application Calculator](https://calculators.geekmidst.com/calculators/soil-lime-requirement-calculator.md): Convert a soil-test lime requirement into the amount of your liming product, adjusting for its neutralising value (ECCE/CCE) and your tillage depth.
- [Soil Carbon Stock Calculator](https://calculators.geekmidst.com/calculators/soil-carbon-stock-estimate-calculator.md): Estimate the organic carbon stored in a soil layer from carbon %, bulk density, depth and stone content, in tonnes C and CO₂e per hectare and field.
- [Rainfall Harvest Volume Calculator](https://calculators.geekmidst.com/calculators/rainfall-harvest-volume-calculator.md): Work out how much rainwater a roof or catchment can collect from its area, the rainfall and a runoff coefficient, in litres, cubic metres and US gallons.
- [Farm Pond Volume Calculator](https://calculators.geekmidst.com/calculators/farm-pond-volume-calculator.md): Find the water a dug farm pond holds from its top length and width, depth and side slope, in cubic metres, litres, cubic feet and US gallons.
- [Livestock Feed Ration Calculator](https://calculators.geekmidst.com/calculators/livestock-feed-ration-calculator.md): Mix two feeds to hit a target crude protein (or other nutrient) level with the Pearson square, and get the percentage and weight of each feed in the batch.
- [Cattle Milk Yield Calculator](https://calculators.geekmidst.com/calculators/cattle-milk-yield-calculator.md): Turn a herd’s daily milk into yield per cow in milk and per cow in the herd, 4% fat-corrected milk (Gaines) and a 305-day figure at today’s rate.
- [Poultry Feed Conversion Calculator](https://calculators.geekmidst.com/calculators/poultry-feed-conversion-calculator.md): Calculate a broiler flock’s feed conversion ratio, FCR on weight gain, livability and European Production Efficiency Factor from feed, birds and weights.
- [Poultry Mortality Calculator](https://calculators.geekmidst.com/calculators/poultry-mortality-calculator.md): Work out cumulative flock mortality, livability, birds remaining and the average daily and weekly mortality rate from birds placed, deaths and culls.
- [Fish Pond Stocking Density Calculator](https://calculators.geekmidst.com/calculators/fish-pond-stocking-density-calculator.md): Work out how many fingerlings to stock in a pond from its area and depth, your target yield, harvest weight and expected survival, with fish per m² and per m³.
- [Aquaculture Dissolved Oxygen Demand Calculator](https://calculators.geekmidst.com/calculators/aquaculture-dissolved-oxygen-demand-calculator.md): Estimate how much oxygen a fish stock consumes from its biomass and consumption rate, the water flow that would supply it, and the aerators needed.
- [Farm Labor Cost Calculator](https://calculators.geekmidst.com/calculators/farm-labor-cost-calculator.md): Add up the cost of a farm crew from workers, hours, days and the hourly wage, plus employer on-costs and other costs, with cost per hour and per hectare or acre.
- [Crop Rotation Area Calculator](https://calculators.geekmidst.com/calculators/crop-rotation-area-calculator.md): Split your cropping land into equal rotation courses: net area after headlands and tracks, area per crop each year, and a field-by-year rotation plan.
- [Plant Nursery Tray Requirement Calculator](https://calculators.geekmidst.com/calculators/plant-nursery-tray-requirement-calculator.md): Find how many plug trays, cells and seeds to sow for a transplant order, allowing for germination and establishment losses and spare plants.
- [Orchard Tree Count Calculator](https://calculators.geekmidst.com/calculators/orchard-tree-count-calculator.md): Count the trees an orchard block holds from its area and spacing, for square or rectangular, triangular (hexagonal) and quincunx layouts.
- [Hydroponic Nutrient Concentration Calculator](https://calculators.geekmidst.com/calculators/hydroponic-nutrient-concentration-calculator.md): Find the grams of fertiliser to dissolve for a target ppm of nitrogen, phosphorus, potassium or another nutrient, with P₂O₅ and K₂O label conversion.
- [Aquaponics Water Flow Calculator](https://calculators.geekmidst.com/calculators/aquaponics-water-flow-calculator.md): Size the pump flow for an aquaponics system from the fish tank volume and the turnovers per hour you want, in litres per hour, US gph and gpm.
- [Agricultural Loan Break Even Calculator](https://calculators.geekmidst.com/calculators/agricultural-loan-break-even-calculator.md): See the crop price and yield you need to cover operating costs plus loan repayments per hectare or acre, and the margin left at your expected yield and price.
- [Farm Equipment Depreciation Calculator](https://calculators.geekmidst.com/calculators/farm-equipment-depreciation-calculator.md): Depreciate a tractor or farm machine by straight line, declining balance or sum-of-years’ digits, with each year’s charge, book value and a full schedule.
- [Irrigation Pump Power Calculator](https://calculators.geekmidst.com/calculators/irrigation-pump-power-calculator.md): Work out the water power, pump shaft power and electrical input of an irrigation pump from flow rate, total head and efficiencies, in kW and horsepower.
- [Farm Fence Wire Length Calculator](https://calculators.geekmidst.com/calculators/farm-fence-wire-length-calculator.md): Work out the wire for a multi-strand farm fence from the paddock size or fence line, the number of strands and gates, plus rolls of wire and posts needed.
- [Fodder Storage Capacity Calculator](https://calculators.geekmidst.com/calculators/fodder-storage-capacity-calculator.md): Work out the tonnes of silage or hay a clamp, bunker or barn holds from its size and the fodder’s bulk density, and how many days it will feed your animals.
- [Grain Storage Volume Calculator](https://calculators.geekmidst.com/calculators/grain-storage-volume-calculator.md): Work out how much grain a round bin holds from its diameter, level grain depth and peak height, in cubic metres, US bushels and tonnes at your bulk density.