Planting & Crops
From seed rate to harvest — plan every growth stage
Seed Rate Calculator
Seed needs from spacing and 1000-grain weight
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Plant Population Calculator
Plants per hectare from spacing and row width
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Seed Spacing Calculator
In-row spacing and seeding density per meter
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Seed Treatment Calculator
Pesticide and inoculant rate per kg of seed
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Planting Cost Calculator
Seed, fertilizer and labor cost per hectare
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Corn Yield Calculator
Bushels per acre from ears, kernels and test weight
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Soybean Yield Calculator
Yield from pods per plant, seeds and size
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Rice Yield Calculator
Paddy yield from panicles, grains and moisture
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Cassava Yield Calculator
Tuber yield per hectare from stands and roots
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Sugarcane Yield Calculator
Tons per hectare from stalk count and weight
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Harvest Date Calculator
Optimal harvest window from planting and GDD
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Harvest Loss Calculator
Losses at each harvest stage and financial impact
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Crop Yield Estimator
Yield from plant population, grains and test weight
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Seed Germination Calculator
Germination rate and adjusted seeding rate
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Crop Rotation Planner
Rotation sequences, area allocation and schedules
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Cover Crop Calculator
Seed mix and biomass production for cover crops
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Crop Planting Calendar
Planting and harvest dates by frost dates
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Orchard Spacing Calculator
Tree spacing, trees/ha and seedling needs
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Crop Growth Stage Calculator
Key stages and harvest date from planting date
→Fertilizer & Soil
Nutrient management, soil health and compost
Fertilizer Calculator
N-P-K requirements from target yield and efficiency
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Nitrogen Rate Calculator
Nitrogen application rate by crop and yield goal
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NPK Fertilizer Mix Calculator
Blend N-P-K sources to match target ratio
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Lime Application Calculator
Lime tons per acre to correct soil pH
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Soil Bulk Density Calculator
Bulk density from core volume and dry weight
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Soil Organic Matter Calculator
Organic matter and carbon from soil test
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Soil Test Calculator
Interpret soil test and recommend nutrient rates
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Nutrient Deficiency Analyzer
Diagnose deficiency symptoms and corrections
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Soil Carbon Stock Calculator
Carbon stored per hectare by depth and texture
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Compost Calculator
Compost batch size and C:N ratio balancing
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Compost Application Calculator
Tons per acre of compost for nutrient needs
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Mulching Estimator
Mulch material quantity and cost per area
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Vermicompost Calculator
Worm bed size and vermicompost production
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Soil Compaction Analyzer
Compaction risk and tillage depth recommendation
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Soil pH Amendment Calculator
Lime for acid or sulfur for alkaline soils
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Soil Amendment Calculator
Gypsum, sulfur and organic amendment rates
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Soil Volume Calculator
Topsoil and fill dirt volume for beds and fields
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Soil Moisture Monitor
Track moisture and generate irrigation schedules
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Organic Fertilizer Calculator
Manure and compost nutrient content and rates
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Banana Fertilizer Calculator
N-P-K and micronutrient schedule for bananas
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Cocoa Fertilizer Calculator
Fertilizer rates by cocoa tree age and yield
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Coffee Fertilizer Calculator
Nitrogen and nutrient schedule for coffee
→Irrigation & Water
Water needs, system design and pumping
Irrigation Calculator
Water requirement and irrigation time by soil
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Irrigation Run Time Calculator
Runtime to refill root zone from moisture
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Water Application Rate Calculator
Inches per hour from sprinkler spacing and flow
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Irrigation Flow Rate Calculator
Flow in gpm from hose size and pressure
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Irrigation Schedule Calculator
Weekly watering schedule by ET and growth stage
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Dam Volume Calculator
Farm dam capacity from shape and depth
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Farm Water Security Calculator
Water supply vs demand across the season
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Rainfall Harvest Calculator
Rainwater collected from roof and catchment area
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Water Table Depth Calculator
Well yield and water table monitoring
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Center Pivot Calculator
Acreage covered and water application by pivot
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Drip System Designer
Emitters, spacing, flow and pipe sizing
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Pump Capacity Calculator
Horsepower and flow needed for irrigation
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Crop Water Requirement
Daily and seasonal water needs by ET
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Drainage Tile Calculator
Tile spacing and depth for wet soils
→Machinery & Equipment
Tractors, fuel, greenhouses and renewable energy
Equipment Cost Calculator
Ownership and operating cost per hour
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Repair & Maintenance Calculator
Annual repair and maintenance cost estimate
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Machinery Cost per Acre
Total machinery cost amortized over acres
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Fuel Efficiency Calculator
Fuel use per acre and cost by operation
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Tractor Fuel Use Calculator
Diesel consumption by tractor HP and task
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Field Capacity Calculator
Acres per hour from speed, width and efficiency
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Transport Cost Calculator
Freight cost per tonne by distance and vehicle
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Solar Panels Calculator
System size and payback for farm solar
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Biogas Plant Calculator
Biogas output from manure and plant size
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Greenhouse Cost & Payback
Construction cost, profit and ROI
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Greenhouse Ventilation Calculator
Ventilation rate for temperature and humidity
→Livestock & Animals
Feed, health, pasture and production for all livestock
Feed Ration Calculator
Daily intake and protein needs per animal
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Feed Conversion Ratio Calculator
FCR and profitability for livestock and aquaculture
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Cattle Feed Ration Calculator
Balanced ration for dairy and beef cattle
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Livestock Mortality Calculator
Mortality rate and financial loss from losses
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Egg Production Calculator
Eggs per hen and weekly revenue from flock
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Dairy Milk Calculator
Milk yield, feed cost and dairy profit
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Drought Feeding Calculator
Emergency feed rations during drought
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Forage Yield Calculator
Forage tons per acre from cutting and dry matter
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Pasture Growth Calculator
Daily pasture growth rate and cover
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Fodder Production Calculator
Hydroponic and green fodder yield per tray
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Hay Value Calculator
Nutrient value of hay vs purchased feed
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Hay Requirement Calculator
Tons of hay needed for winter feeding
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Silage Preparation Calculator
Forage needed and additive rate for silage
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Silage Pile Calculator
Bunker size and volume for silage storage
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Pasture Rotation Planner
Paddock size and grazing rotation schedule
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Livestock Stocking Density
Optimal density and max barn capacity
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Livestock Weight Estimator
Weight from heart girth and body length
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Weight Gain Calculator
Average daily gain and finish date
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Calving Date Calculator
Expected calving date from breeding date
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Dry Matter Calculator
Dry matter content and intake from feed
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Bale Count Calculator
Number of bales from field yield and size
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Fencing Calculator
Fence length, posts and cost per paddock
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Water Trough Calculator
Trough size and flow for herd watering
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Aquaculture Stocking Calculator
Fish and shrimp density, seed and feed needs
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Beekeeping & Honey Calculator
Honey yield, revenue and apiary profit
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Mushroom Substrate Calculator
Substrate recipes, spawn and expected yield
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Veterinary Dosage Calculator
Drug dosing by weight, water or feed
→Grain Storage
Bin capacity, moisture shrink and handling losses
Grain Bin Capacity Calculator
Bushels by bin diameter and height
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Grain Storage Calculator
Storage time and cost per bushel
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Grain Weight Calculator
Weight from volume and bushel weight
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Grain Shrink Calculator
Weight loss from drying to target moisture
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Moisture Shrink Calculator
Shrinkage from high to safe moisture content
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Dockage Calculator
Foreign material and dockage deduction
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Test Weight Deduction
Price deduction from low test weight
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Cold Storage Calculator
Room size and cooling load for produce
→Farm Finance
Budgets, loans, break-even and profit analysis
Farm Budget & Profit Calculator
Revenue, costs, margin and break-even
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Farm ROI Calculator
Return on investment for farm projects
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Break-Even Price Calculator
Minimum price to cover all costs
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Break-Even Yield Calculator
Yield needed to cover fixed and variable costs
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Agricultural Loan Calculator
Monthly payment, interest and amortization
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Farm Subsidy Estimator
Direct payments, insurance and conservation aid
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ARC/PLC Payment Calculator
2026 reference prices, ARC vs PLC payments
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FSA Loan Calculator
Loan limits, rates and monthly payments
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Beginning Farmer Down Payment
5-45-50 land purchase structure
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Crop Insurance Premium Calculator
2026 subsidy rates, SCO/ECO and beginner bonus
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Dairy Margin Coverage Calculator
Tier 1/2 indemnity and premium estimate
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EQIP Cost-Share Calculator
75%/90% conservation cost-share estimate
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Crop Insurance Calculator
Premium and indemnity for crop risk
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Crop Margin Calculator
Net margin per acre by crop and enterprise
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Land Rent Calculator
Annual or monthly rent with escalation
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Land Value Calculator
Farmland value from rent and cap rate
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Labour Productivity Calculator
Output per worker and labour cost per unit
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Farm Income Tax Calculator
Estimated tax and deductions for farmers
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Custom Farming Rate Calculator
Rate per acre for custom farming services
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Profit per Head Calculator
Net profit per animal for livestock enterprises
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Produce Price Converter
$/kg to $/lb to $/ton conversion
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Farm Carbon Footprint Calculator
GHG emissions and reduction opportunities
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Produce Pricing Calculator
Optimal selling price from cost and margin
→Land & Area
Land area conversions and field measurements
Calibration & Spraying
Spray tank mix, drill and spreader calibration
Tank Mix Calculator
Chemical and water amounts per spray tank
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Seed Drill Calibration
Calibrate drill to desired seeding rate
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Fertilizer Rate Converter
Convert between fertilizer formulations and units
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Pesticide Dilution Calculator
Mix by ratio, percentage or ppm
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Herbicide Application Calculator
Herbicide and water volume per acre
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Pesticide Residue Calculator
Estimate residue and safe consumption limits
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Pesticide Safety Interval
Pre-harvest interval and safe harvest date
→Climate & Risk
Frost, growing degree days and temperature risk
General & Utilities
Date, temperature and everyday farm utilities
In-Depth Farming Guides
Science-based articles to help you farm smarter
How to Read a Soil Test Report
Interpret pH, N-P-K, organic matter, CEC, and base saturation to optimize your fertilizer program.
Drip Irrigation: How Long to Run
Calculate runtime based on emitter flow, crop water needs, soil type, and efficiency.
Fertilizer Cost per Acre Guide
Break down N-P-K costs, compare products, and find strategies to reduce fertilizer expenses.
Latest from the Blog
Practical farming tips, calculator tutorials, and analysis
A Beginner's Guide to Soil Testing
Why every farmer should test their soil, when to test, how to collect proper samples, and how to interpret results.
How Much Can Drip Irrigation Save You?
A real calculation showing water, energy, and cost savings for a 5-hectare vegetable farm.
Organic vs Synthetic Fertilizer: Which Is Cheaper?
A nutrient-by-nutrient cost comparison and the true cost of both approaches.
Agricultural Glossary
53+ farming terms andefinitions. From CEC to evapotranspiration, understand the language of modern agriculture.
Browse the Glossary →Recommended Farming Tools & Supplies
Hand-picked products to help you implement our calculator recommendations
Garden Tool Set - 12 Piece
Heavy duty gardening tools with bag
Luster Leaf Soil Test Kit
Soil pH, N, P, K test kit
Digital Pocket Scale - 66lbs
Precision scale for produce & livestock
Drip Irrigation Kit - 100ft
Complete drip irrigation system
Felco Pruning Shears F-2
Professional bypass pruning shears
Garden Hose Nozzle Sprayer
10 pattern water hose nozzle
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About Agricalc
Agricalc provides free, science-based online calculators for farmers, agronomists, agricultural students, and anyone involved in crop and livestock production. Our tools cover the full farming cycle — from planting and fertilization to harvest and marketing.
All calculations are based on established agricultural formulas and reference data. Results are estimates intended for planning purposes — always consult local agricultural extension services and qualified agronomists for site-specific recommendations.
Reviewed by Agricalc Editorial Team — Agricultural engineers and agronomists with 10+ years of field experience. Our team verifies every calculator formula against peer-reviewed extension publications. For site-specific advice, consult your local agronomist.