Agriculture and gardening
Farming, livestock, gardening and horticulture calculators. Every page below is currently a stub: the working tool, its formula and its worked example are published one calculator at a time, and a page is listed in the index allowlist only once it is finished.
167 calculators in 19 subjects.
Breeding and calendars
- Breeding Season and Calving Window Calculatorstub
- Cattle Gestation Calculatorstub
- Chicken Egg Hatch Date Calculatorstub
- Dog and Cat Gestation Calculatorstub
- Goat Gestation Calculatorstub
- Horse Gestation Calculatorstub
- Pig Gestation Calculatorstub
- Rabbit Gestation and Kindling Calculatorstub
- Sheep Gestation Calculatorstub
- Weaning Weight Adjusted 205 Day Calculatorstub
Chemicals and applications
- Boom Sprayer Nozzle Selection Calculatorstub
- Fertilizer Cost per Unit of Nitrogen Calculatorstub
- Herbicide Rate per Acre and Tank Mix Calculatorstub
- Lime Requirement for Cropland Calculatorstub
- Manure Spreader Calibration Calculatorstub
- Pre Harvest Interval and Re Entry Date Calculatorstub
- Spray Drift Buffer Distance Calculatorstub
Composting
Fertilizer
- Compost Tea and Organic Feed Dilution Calculatorstub
- Fertilizer Blend and Custom Mix Calculatorstub
- Fertilizer Injector Ratio Calculatorstub
- Fertilizer NPK Rate Calculatorstub
- Liquid Fertilizer Dilution Calculatorstub
- Manure Nutrient Value Calculatorstub
- Nitrogen per Thousand Square Feet Calculatorstub
- P2O5 and K2O to Elemental Conversion Calculatorstub
- PPM of Nitrogen from a Fertilizer Solution Calculatorstub
- Slow Release Fertilizer Longevity Calculatorstub
Hydroponics
- Deep Water Culture Reservoir and Air Pump Sizing Calculatorstub
- Grow Light Coverage and Wattage Calculatorstub
- Grow Light PPFD and DLI Calculatorstub
- Grow Tent Ventilation CFM Calculatorstub
- Hydroponic Nutrient PPM and EC Converterstub
- Hydroponic Nutrient Solution Mixing Calculatorstub
- NFT Channel Flow Rate Calculatorstub
- pH Down and pH Up Dosing Calculatorstub
- Reservoir Top Off and EC Drift Calculatorstub
- Vapor Pressure Deficit Calculatorstub
Irrigation
- Container Watering Frequency Calculatorstub
- Drip Irrigation Emitter and Run Time Calculatorstub
- Garden Watering Volume Calculatorstub
- Greenhouse Heating and Cooling Load Calculatorstub
- Irrigation Zone Flow and Head Count Calculatorstub
- Rain Barrel and Rainwater Harvest Calculatorstub
- Soaker Hose Run Time Calculatorstub
- Sprinkler Precipitation Rate Calculatorstub
Irrigation and water
- Center Pivot Application Depth Calculatorstub
- Crop Evapotranspiration and Irrigation Requirement Calculatorstub
- Irrigation System Efficiency and Gross Water Calculatorstub
- Pump Horsepower and Energy Cost Calculatorstub
- Reference Evapotranspiration Calculatorstub
- Water Storage Tank and Trough Sizing Calculatorstub
- Well Yield and Drawdown Calculatorstub
Lawn care
- Grass Seed Germination Time Estimatorstub
- Lawn Area from Irregular Yard Calculatorstub
- Lawn Fertilizer Bag Coverage Calculatorstub
- Lawn Grass Seed Quantity Calculatorstub
- Lawn Mowing Height and One Third Rule Calculatorstub
- Lawn Spreader Setting Calculatorstub
- Lawn Watering Run Time from a Tuna Can Teststub
- Lawn Weed Killer Mix Ratio Calculatorstub
- Sod Roll and Pallet Calculatorstub
Livestock feed
- Average Daily Gain Calculatorstub
- Broiler Growth and Feed Budget Calculatorstub
- Cattle Dry Matter Intake Calculatorstub
- Chicken Feed Consumption and Cost Calculatorstub
- Days on Feed to Target Weight Calculatorstub
- Feed Conversion Ratio Calculatorstub
- Feed Cost per Pound of Gain Calculatorstub
- Feed Ration Balancing Calculatorstub
- Goat and Sheep Feed Requirement Calculatorstub
- Horse Feed and Forage Requirement Calculatorstub
- Milk Replacer Mixing Calculatorstub
- Pearson Square Feed Mix Calculatorstub
- Pig Feed Budget to Market Weight Calculatorstub
- Total Mixed Ration Batch Weight Calculatorstub
- Winter Hay Requirement Calculatorstub
Machinery and field work
- Combine Harvest Loss Calculatorstub
- Crop Break Even Price Calculatorstub
- Custom Hire versus Own Break Even Acres Calculatorstub
- Farm Enterprise Budget and Break Even Yield Calculatorstub
- Farm Land Rent per Acre Calculatorstub
- Field Capacity and Acres per Hour Calculatorstub
- Grain Auger Capacity and Fill Time Calculatorstub
- Machinery Cost per Acre Calculatorstub
- PTO Speed and Implement Gear Ratio Calculatorstub
- Tractor Drawbar Power and Ballast Calculatorstub
- Tractor Fuel Consumption and Cost Calculatorstub
- Tractor Wheel Slip Calculatorstub
Pasture and grazing
- Animal Unit and Stocking Rate Calculatorstub
- Carrying Capacity and Grazing Days Calculatorstub
- Corral and Pen Space Requirement Calculatorstub
- Electric Fence Energizer Joule Sizing Calculatorstub
- Fence Wire, Post and Insulator Calculatorstub
- Hay Feeding Days from Stored Inventory Calculatorstub
- Livestock Water Requirement Calculatorstub
- Pasture Dry Matter Estimate from Clippingstub
- Pasture Forage Yield from a Rising Plate Meterstub
- Rotational Grazing Paddock Size Calculatorstub
Pest and spray
Planting and seeding
- Cover Crop Mix Seeding Rate Calculatorstub
- Field Area from GPS or Dimensions Calculatorstub
- Plant Population from Row Spacing and Seed Spacingstub
- Planter Seed Drop and Plate Setting Calculatorstub
- Pounds of Seed per Acre Calculatorstub
- Pure Live Seed Calculatorstub
- Row Length per Acre Calculatorstub
- Seeding Rate Calculatorstub
Ponds and water
Poultry and small stock
Seeds and spacing
- Chill Hours Accumulation Calculatorstub
- Days to Maturity and Harvest Date Calculatorstub
- Fall Planting Date Calculatorstub
- Frost Date and Growing Season Length Calculatorstub
- Growing Degree Days Calculatorstub
- Plant Hardiness Zone Lookup by Minimum Temperaturestub
- Seed Germination Rate Calculatorstub
- Seed Quantity for a Garden Row Calculatorstub
- Seed Spacing and Plant Count Calculatorstub
- Seed Starting Date Calculatorstub
- Square Foot Gardening Plant Count Calculatorstub
- Succession Planting Schedule Calculatorstub
- Transplant Spacing and Population Density Calculatorstub
Soil and beds
- Compost Application Rate Calculatorstub
- Elemental Sulfur to Lower Soil pH Calculatorstub
- Garden Soil Mix Ratio Calculatorstub
- Lime Requirement and pH Adjustment Calculatorstub
- Mulch Coverage Calculatorstub
- Potting Mix Volume for Containers Calculatorstub
- Raised Bed Soil Volume Calculatorstub
- Soil Amendment Rate Calculatorstub
- Soil Bulk Density and Porosity Calculatorstub
- Soil Test Interpretation and Nutrient Deficit Calculatorstub
- Soil Texture Triangle Classifierstub
- Soil Water Holding Capacity Calculatorstub
Trees and shrubs
Yield estimation
- Bushel Weight and Test Weight Converterstub
- Bushels to Metric Tons Converterstub
- Corn Yield Estimate Calculatorstub
- Crop Yield per Hectare and per Acre Converterstub
- Grain Bin Capacity Calculatorstub
- Grain Drying Cost Calculatorstub
- Grain Moisture Shrink Calculatorstub
- Grain Pile and Flat Storage Volume Calculatorstub
- Hay Bale Weight and Count Calculatorstub
- Hay Storage Loss and Cost per Ton Calculatorstub
- Silage Pile and Bunker Tonnage Calculatorstub
- Soybean Yield Estimate Calculatorstub
- Wheat Yield Estimate Calculatorstub