Smart Logic for Smart Farming
Free, science-based agricultural calculators and guides — built to help every farmer, agronomist, and home gardener make smarter decisions, faster.
🔍 Search All 58 Tools Instantly
58 Free Agricultural Calculators
Every tool is built on internationally recognised agronomic research. Instant results. No login needed.
Crop-wise Fertilizer Calculator
Get crop-specific NPK recommendations split into Basal, 1st, 2nd, and 3rd doses for any crop.
Soil pH Corrector Calculator
Find the right lime or sulphur dose to bring your soil pH to the ideal level for your crops.
Gypsum Requirement Calculator
Calculate how much gypsum to apply to reclaim sodic soils and improve water infiltration.
Organic Carbon to NPK Ratio Calculator
Discover the true NPK value locked in your organic matter and plan fertilizer savings accordingly.
Compost Pile Calculator
Get the right green-to-brown ratio and volume of inputs for a fast, high-quality compost pile.
Vermicompost Bed Size Calculator
Calculate the ideal vermicompost bed dimensions based on your organic waste volume and farm size.
Micronutrient Deficiency Guide & Calculator
Identify crop micronutrient deficiencies and calculate the correct foliar correction dose.
Liquid Fertilizer Dilution Calculator
Calculate the exact dilution ratio for any liquid fertilizer, slurry, or foliar spray for your field size.
Soil Moisture Depletion Calculator
Track how fast your soil loses moisture and know exactly when to irrigate before crop stress sets in.
Mulching Sheet Calculator
How many rolls do you need? Calculate mulching coverage & cost per acre — plan before you buy.
Fruit Tree Pruning Guide & Calculator
Know when to prune, how much to remove, and which branches to cut — improve tree health and fruit yield.
Drip Irrigation Layout Calculator
Plan pipe length, dripper count, discharge rate and full irrigation schedule for your farm layout.
Irrigation Scheduling Calendar
Stop guessing when to irrigate — use science to plan every watering day for your specific crop.
Borewell Yield Estimator
Know your borewell’s true water capacity before you plant — avoid costly mid-season shortfalls.
Water Storage Capacity Calculator
Calculate your farm pond or water tank storage capacity instantly for better water planning.
Irrigation & Fertigation Calculator
Combine irrigation scheduling with fertigation planning to deliver nutrients precisely through your system.
Advanced Spray Calculator
Calculate spray volume, concentration, and water mix required for any pesticide or foliar spray application.
Crop Water Requirement Calculator
Calculate the full season irrigation needs in mm and litres per acre for any crop — plan water precisely.
Foliar Spray Nutrient Dosage Calculator
Calculate the exact nutrient dose and water volume for foliar spraying — get the right mix for every crop and stage.
Farm Water Filtration System Size Calculator
Choose the right filter size and type — sand, disc, or screen — for drip irrigation and sprinkler systems.
Universal Sprinkler Spacing, Rate & Runtime Calculator
Design your sprinkler system — calculate spacing, application rate, and daily runtime for any crop.
Milk Rate Calculator
Calculate milk payment based on fat % and SNF % — get the accurate price per litre for your dairy.
Poultry Feed & Profit Calculator
Calculate your poultry farm’s full life-cycle profit and loss — feed, medical, labour, eggs, and meat.
Dairy Feed Calculator
Balance daily feed rations for dairy cattle based on body weight, milk production, and nutritional targets.
Cattle & Buffalo Weight Gain Calculator
Track Average Daily Gain (ADG), project target weight, and monitor your herd’s growth performance.
Animal Gestation Calculator
Predict expected birth date for cow, buffalo, goat, sheep, and pig — plan ahead for every delivery.
Egg Production Rate Calculator (HDP)
Calculate Hen Day Production, track weekly trends, and compare flock performance in real time.
Fisheries Stocking Density Calculator
Determine how many fish your pond can sustainably support for healthy, profitable aquaculture.
Young Animal Feeding Planner
Get the perfect daily feed plan for calves, kids, lambs, and piglets — advanced young animal nutrition.
Animal Housing Space Planner
Calculate correct space per animal for cattle, goats, poultry, and pets to boost health and productivity.
Goat Farming Profit Forecast
Project goat farming income using a breeding-based financial model — plan before you invest.
Livestock Weight Estimator
Estimate live weight of cattle, buffalo, and goat using body measurements — no scale needed.
Rainwater Harvesting Calculator
Estimate how much rainwater your farm or rooftop can collect and store for dry-season irrigation use.
Evapotranspiration (ET) Calculator
Calculate daily crop water loss through transpiration and schedule irrigation scientifically.
Livestock Heat Stress Index Calculator
Check the Temperature Humidity Index (THI) and heat stress risk level for cattle, buffalo, and poultry.
Crop Risk Temperature Calculator
Check whether tonight’s temperature will damage your crop — get advance warning before frost or heat damage.
Farmer Profit & Loss Calculator
Calculate per acre income, cost, profit and loss — know your true farming profit before you sell a single bag.
Crop Yield Calculator
Estimate expected crop yield per acre, hectare, and total farm production based on variety and inputs.
Honey Production Calculator
Know your exact annual honey yield from your hive count, strength, and floral sources — plan your apiary income.
Crop Growing Season Planner Calendar
Find what to plant this month, compare crop varieties, and get personalised sowing-to-harvest recommendations.
Cold Storage Calculator
Plan cold storage ROI, refrigeration load, and project report — know capacity, tonnage, and cooling load.
Tree Yield and Revenue Calculator
Calculate timber volume, heartwood weight, and agroforestry income from your tree plantation.
PMFBY Crop Insurance Calculator
Know your exact crop insurance premium and claim amount before you pay a single rupee under Pradhan Mantri Fasal Bima Yojana.
Rainfed / Dryland Carbon Credit Calculator
Estimate the carbon credits your rainfed farm can earn through sustainable land management practices.
Irrigated Carbon Credit Calculator
Calculate carbon credits for irrigated farms factoring in pump energy, tillage, residue, and soil carbon.
Fruit Trees & Agroforestry Carbon Credit Calculator
Estimate the carbon sequestration value and credit income from your fruit trees or agroforestry plots.
Biogas Plant Calculator
Calculate biogas output, slurry production, and energy savings from your farm’s biogas plant setup.
Solar Power Calculator for Agriculture
Know your exact solar panel count, system size, and energy requirement for farm irrigation and machinery.
Subsidy Calculator for Solar System (Agriculture)
Estimate your government solar subsidy, farmer contribution, and loan amount for agricultural solar installation.
Agriculture Subsidy Calculator
Calculate government subsidy, farmer contribution, loan amount, and net cost for any farm investment.
Tractor & Harvester Fuel Calculator
Calculate diesel consumption per km, per acre, and total fuel cost for tractors, harvesters, and farm vehicles.
Grains Storage Capacity Calculator
Calculate storage volume in m³ and tons for your warehouse — plan for grains, pulses, and produce.
Seed Calculator for Farmers
Calculate exact seed quantity, plant population, and seed cost for any crop based on area and spacing.
Shelf Life Calculator
Calculate the expected shelf life of fruits and vegetables based on storage temperature and conditions.
Smart Oil Yield Calculator
Calculate oil output and by-product for 31 oilseeds, nuts, fruits, and herbal crops — plan your oil extraction.
Powder Yield Calculator
Calculate how much powder you will get from your fresh produce — plan drying and processing output precisely.
Export Quality Grader
Check whether your fruits and vegetables meet international export standards before you pack — avoid rejection.
Silage Bag Calculator
Estimate the right silage bag size and total storage capacity for your forage crop volume.
Where Agricultural Knowledge Meets Practical Tools
Precision Agriculture Calculators was born from a simple frustration — complex agricultural calculations were scattered, expensive, or locked behind paywalls. We set out to change that.
“Farming decisions should never be limited by access to information. Every farmer — whether they farm one acre or one thousand — deserves accurate, free, and practical tools.”
Today, Precision Agriculture Calculators is a free agricultural intelligence platform serving farmers, agronomists, students, and home gardeners across India and worldwide. Every tool is built on internationally recognised agronomic research — no paywalls, no signup, no compromise.
Read Our Full Story →
Farming Articles & Expert Guides
Science-backed farming guides written in plain language for farmers worldwide.
Sprinkler vs. Drip Irrigation: Which System Is Right for Your Farm?
A side-by-side comparison of drip and sprinkler systems — costs, crop suitability, water savings, and which one suits your farm best.
Read Article →Borewell Recharge: How to Refill Your Borewell and Never Run Dry
Practical guide to borewell recharge methods — rooftop harvesting, farm ponds, and injection wells — with step-by-step instructions.
Read Article →How to Read a Soil Test Report: Complete Guide to Every Number
Decode every value in your soil test report — pH, N-P-K, organic carbon, EC, micronutrients — and turn numbers into an action plan.
Read Article →Carbon Credits Farming: Your Farm Can Actually Earn From Them
A plain-language guide to carbon credits — what they are, how they work, and whether your farm qualifies to earn from them.
Read Article →Poultry Farming: Broiler vs. Layer — Which One Is Right for Your Farm?
A complete comparison of broiler and layer farming — costs, profits, risks, and which model suits your situation best.
Read Article →Farm’s True Profit and Loss: How to Calculate Every Hidden Cost
A complete guide to honest farm financial planning — every hidden cost most farmers never count, and how to fix that.
Read Article →Vermicompost: Turn Your Farm’s Organic Waste Into Black Gold
A complete guide to starting a vermicompost unit from bed sizing to harvest — turn waste into valuable organic fertiliser.
Read Article →Solar Powered Farming: How to Cut Your Electricity Bill to Zero
A practical guide to running your irrigation on sunlight — panels, subsidy, payback period, and real savings explained.
Read Article →Family Herb Garden: How to Grow and Use Herbs in Your Kitchen Daily
Grow tulsi, coriander, mint, curry leaf, and 8 more herbs at home. Complete planting, care, and harvesting guide.
Read Article →Vertical Gardening for Small Spaces: Grow More Vegetables at Home
Maximise your harvest with vertical growing structures, wall planters, and trellises — even on a balcony or terrace.
Read Article →Is Your Soil Sick? 7 Warning Signs and How to Fix It
Identify the 7 signs of poor soil health and learn practical, low-cost fixes to restore life, structure, and fertility.
Read Article →Every Drop Counts: 10 Smart Water-Saving Techniques for Your Home Garden
Ten practical, proven techniques to reduce garden water use by 40–60% without sacrificing plant health or yield.
Read Article →Turn Kitchen Scraps Into Garden Gold: Complete Beginner’s Guide to Composting
Start your first compost pile with kitchen scraps and garden waste — step-by-step guide for complete beginners.
Read Article →How to Get Rid of Garden Pests Naturally: A Complete Organic Pest Control Guide
Control aphids, whiteflies, caterpillars, and 20 more common pests without chemicals — safe for family and pollinators.
Read Article →8 Natural Fertilizers From Kitchen Waste That Save You Money Every Month
Turn banana peels, eggshells, rice water, and 5 other kitchen scraps into powerful natural fertilizers for free.
Read Article →Start Making Smarter Farm Decisions Today
58 free tools. 22 expert guides. Science-based results. Zero signup. Built for farmers worldwide by a farmer who understands your challenges.
To demonstrate how to use these tools, we have utilised Indian currency, place names, and personal names in various examples. You may substitute these with the specific place names and currency relevant to your own location from where you are accessing this site to facilitate a better understanding of the information provided.
We thank you for visiting our website and utilising our tools. We also extend a warm welcome to everyone visiting this site.
Happy Farming!