Farming & Garden
53 free farming & garden tools in the Calculators & Converters collection — every one runs in your browser with no signup and no uploads.
Aquaculture Stocking Density Calculator
Calculate maximum stocking density and feed loading per pond or tank volume
Aquarium Alkalinity (KH) & Buffer Calculator
Calculate baking soda or commercial buffer needed to raise KH
Aquarium CO2 Bubble Count Rate Calculator
Convert CO2 bubble count per second to an approximate dosing rate
Aquarium Flow & Turnover Rate Calculator
Calculate filter and powerhead flow needed for your tank turnover
Aquarium Heater Wattage Calculator
Size the right heater wattage for your tank and room temperature
Aquarium Live Rock Amount Calculator
Calculate pounds of live rock needed for a reef tank
Aquarium Nitrogen Cycle Tracker
Log ammonia, nitrite, and nitrate to track new-tank cycling progress
Aquarium Quarantine Tank Protocol Calculator
Calculate medication rotation schedule for a quarantine tank
Planted Tank CO2 Reactor Sizing Calculator
Size a CO2 reactor for your planted aquarium by volume and plant mass
Aquarium Salinity / Specific Gravity Converter
Convert between ppt salinity, specific gravity, and conductivity for reef tanks
Aquarium Stocking Capacity Calculator
Inch-per-gallon and surface-area stocking rules for fish tanks
Aquarium Substrate Amount Calculator
Calculate bags of gravel, sand, or aquasoil for any tank depth
Aquarium TDS Remineralization Calculator
Dose remineralizer to hit a target TDS for shrimp tanks
Aquarium Water Change % Calculator
Calculate how many water changes reduce a pollutant to your target level
Crop Yield Estimator
Estimate corn, wheat, or soybean yield from ear count, kernel count, and test weight
Aquarium Substrate Depth Guide Calculator
Minimum substrate depth for live plants by plant root depth category
Drip Irrigation Run Time Calculator
Find the run time to deliver your target water volume
Companion Planting Reference Tool
Look up companion and antagonist plant pairings for your garden
Grain Bill Color & OG Optimizer
Adjust a two-malt grain bill to hit both your target OG and SRM colour
Grain Shrink & Drying Cost Calculator
Calculate shrink weight loss and drying cost to reach standard moisture
Grain Storage Capacity Calculator
Calculate bushels or tonnes of grain in cylindrical bins, flat storage, and piles
Grain Test Weight & Moisture Corrector
Adjust grain test weight and bushel weight to standard moisture for marketing
Grow Light PPFD & DLI Calculator
Calculate PPFD and daily light integral for any grow light setup
Grow Tent Ventilation & CFM Calculator
Size an inline extraction fan for your grow tent in CFM
Harvest Moisture Loss & Shrink Calculator
Calculate actual vs. standard-moisture bushels and moisture-shrink cost at harvest
Hay Bale Weight Estimator
Estimate hay bale weight from dimensions and species for round, square, and large square bales
Herbicide / Pesticide Tank Mix Calculator
Calculate product volume per tank and per acre from label rate and field size
Hydroponics Nutrient Solution Calculator
Mix nutrient concentrates to a target EC and ppm for hydro growing
Livestock Gestation Date Calculator
Calculate expected delivery date for cattle, sheep, pigs, horses, and goats
All-Grain to Extract Conversion Calculator
Convert all-grain base malt amounts into equivalent DME or LME weights.
Nitrogen Use Efficiency (NUE) Calculator
Calculate NUE percentage from crop uptake and fertilizer applied to optimise N applications
Paddock Rotation Calculator
Calculate rest period, paddock number, and grazing days for rotational grazing
Pest Economic Threshold Reference Tool
Look up economic thresholds for common field-crop pests to decide spray or no-spray
Plant Population & Row-Spacing Tool
Calculate plant population per acre from row spacing and in-row seed spacing
Plant Watering Interval Calculator
Calculate how often to water based on plant type, pot, and climate
Seed Cost Per Acre Calculator
Calculate seed cost per acre and per bushel of yield from bag price and seeding rate
Garden Seed Spacing & Row Calculator
Calculate how many plants fit in your garden bed by spacing
Silage Tonnage Calculator
Estimate fresh and dry-matter tonnes of silage in a clamp, pit, or pile
Tank-Mix Partner Compatibility Reference
Check common herbicide and fungicide tank-mix compatibility from a static reference
Livestock Veterinary Drug Dose Calculator
Calculate drug dosage and volume to draw for cattle, sheep, and pig treatments
Grass Seed Calculator
Work out how much lawn seed you need — and what it will cost.
Garden & Raised-Bed Soil Volume Calculator
Find out exactly how many litres (or bags) of compost or topsoil your raised bed needs.
Plant Spacing Calculator
Find exactly how many plants fit your bed — square or triangular grid.
Hydroponic Nutrient Calculator
Calculate exact salt weights for any reservoir volume and EC target.
Fertilizer NPK Calculator
Calculate nutrients delivered, required application rates, and bags needed from any NPK grade.
Chicken Feed Calculator
Daily feed, water, and nutrient needs for any chicken type — layers, broilers, pullets, and more.
Crop Yield Calculator
Calculate yield per hectare or acre from any harvest quantity and field area.
Greenhouse Heating Calculator
Size your greenhouse heater in seconds — fabric loss, infiltration and all.
Irrigation Water Calculator
Calculate gross irrigation requirements, water volumes, and flow rates for any crop and field.
Stocking Density Calculator
Calculate animals per area or biomass per volume — with welfare band assessment.
Hay Bale Calculator
Calculate bale volume, dry matter and how many bales your livestock need.
Livestock Feed Calculator
Calculate daily feed, energy and protein requirements for cattle, sheep, pigs and poultry.
Silage Calculator
Clamp volume, field yield, DM tonnage and feeding days — all in one tool.