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All agriculture calculators

46 free tools for everyday farm maths – fertilizer doses, seed rates, spray mixing, irrigation and land measurement. Every calculator works in the units Indian farmers actually use, and shows the formula so you can check the working.

Fertilizer Calculators

Turn a nutrient recommendation into bags of urea, DAP, MOP and SSP – and work out what it will cost.

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NPK Calculator Convert an N:P:K recommendation into kilograms and bags of urea, DAP or SSP, and MOP for your field. Urea Calculator Find out how much urea to buy for your field from the nitrogen dose, in kilograms and 45 kg bags. DAP Calculator Calculate DAP needed from your phosphorus (P₂O₅) dose, plus the nitrogen it supplies and the number of 50 kg bags. MOP Calculator Work out Muriate of Potash (MOP) needed from your K₂O dose, in kilograms and 50 kg bags. SSP Calculator Calculate Single Super Phosphate needed from your P₂O₅ dose, and the sulphur it supplies. Fertilizer Requirement Calculator Find the quantity of any fertilizer – straight, complex or water-soluble – from the nutrient dose and its percentage. Fertilizer Cost Calculator Add up the cost of urea, DAP, MOP and other fertilizers for your field, and see the cost per acre.

Crop Calculators

Plant population, spacing, yield estimates and the land you need to hit a production target.

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Plant Population Calculator Count how many plants fit in your field for any spacing – rectangular, square or triangular planting. Plant Spacing Calculator Find the plant-to-plant spacing that gives your target number of plants per acre. Crop Yield Calculator Estimate total crop yield and yield per acre from a small harvested sample (crop cutting method). Crop Area Calculator Work out how much land to plant to reach a production target, based on expected yield.

Seed Calculators

Seed rate from spacing and seed quality, germination tests and seed treatment quantities.

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Seed Rate Calculator Calculate how many kilograms of seed you need per acre from spacing, 1000-seed weight, germination and purity. Germination Percentage Calculator Work out germination % from a simple seed test and adjust your seed rate to match. Seed Treatment Calculator Calculate how much seed treatment product and water you need for your seed quantity, from the label dose.

Spray Calculators

Mix the label dose correctly for your tank, count tank fills and cost out a spray round.

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Pesticide Dilution Calculator Convert the label dose into ml or grams per tank, total product and the number of tank fills for your field. Spray Tank Calculator Find the total spray water and number of tank fills for your field, and the area one tank covers. Spray Cost Calculator Estimate the full cost of spraying – chemical, labour and extras – per round and per acre.

Irrigation Calculators

Crop water requirement, drip system run time and the cost of pumping water.

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Irrigation Water Requirement Calculator Estimate crop water need with ET₀ and crop coefficient, then convert it to litres and pumping hours for your field. Drip Irrigation Calculator Calculate drippers, lateral pipe length, system flow and how long to run your drip each day. Irrigation Cost Calculator Work out the electricity or diesel cost of pumping irrigation water, per irrigation and for the season.

Soil Calculators

Make sense of soil test reports – ppm to kg per hectare, and elemental P and K to P2O5 and K2O.

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Soil Test ppm to kg/ha Calculator Convert a soil test result from ppm (mg/kg) to kg per hectare and kg per acre, using sampling depth and bulk density. P to P2O5 and K to K2O Converter Convert elemental phosphorus and potassium to P₂O₅ and K₂O (and back), plus Ca to CaO and Mg to MgO.

Farm Calculators

Measure a field from its sides and work out whether a crop will actually make a profit.

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Agricultural Land Area Calculator Measure the area of a field from its side lengths – rectangular, triangular or irregular four-sided – in acres, bigha, hectares, guntha and sq ft. Farm Profit Calculator Calculate crop profit per acre from yield, selling price and cost of cultivation – plus your break-even price.

Land & Unit Conversion Tools

Acre, hectare, square feet and state-wise bigha and biswa conversions.

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Acre to Hectare Converter Convert acres to hectares instantly. 1 acre = 0.4047 hectare. Includes a quick conversion table. Hectare to Acre Converter Convert hectares to acres instantly. 1 hectare = 2.471 acres. Includes a conversion table. Acre to Square Feet Converter Convert acres to square feet. 1 acre = 43,560 sq ft. Also shows square yards (gaj) and square metres. Square Metre to Acre Converter Convert square metres (m²) to acres. 1,000 m² = 0.2471 acre; 4,046.86 m² = 1 acre. Bigha to Acre Converter Convert bigha to acre, hectare and square feet using the bigha size for your state – Rajasthan, UP, Bihar, Punjab, Haryana, MP, Gujarat and more. Biswa to Bigha Converter Convert biswa to bigha, acres and square feet. 20 biswa = 1 bigha, with state-wise bigha sizes.

Dairy & Livestock Calculators

Manage animal nutrition, milk pricing and seasonal fodder preservation for your herd.

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Milk Fat & SNF Rate Calculator Calculate the exact milk price per litre and your total earnings from FAT% and the lactometer reading (CLR), using the two-axis formula dairy cooperatives use. Cattle Feed & Dry Matter Calculator Work out daily dry matter need and balance green fodder, dry straw and concentrate feed from body weight and milk yield. Silage Pit Capacity Calculator Calculate bunker or trench silo volume, the tonnes of green fodder it holds and how many days it will feed your herd.

Machinery & Mechanization Calculators

Track field work rates, diesel use and equipment economics to cut cultivation costs.

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Tractor Diesel Consumption Calculator Estimate diesel use and fuel cost per hour and per acre from tractor horsepower, implement load and the type of operation. Implement Field Capacity Calculator Calculate how many acres or hectares a rotavator, cultivator or plough covers per hour from its width and operating speed. Machinery Rent vs Buy Calculator Compare the yearly cost of owning a machine (depreciation, interest, insurance, running) with custom hire rates, and find your break-even hours.

Post-Harvest & Storage Calculators

Prevent losses at the mandi gate, plan packaging and check whether storing your crop pays.

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Grain Moisture Shrink Calculator Calculate weight shrinkage, handling loss and the value lost when wet grain dries down to standard commercial moisture. Gunny Bag & Packaging Calculator Work out the exact number of 50 kg jute or HDPE bags for your harvest, their cost and the storage floor space needed. Cold Storage Profitability Calculator Estimate the net gain from holding potato, onion or other produce in storage, after rent, weight loss, rot and interest, against selling at harvest.

Weather, Climate & Energy Calculators

Predict crop stages from heat units and size a solar pump for off-grid irrigation.

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Growing Degree Days (GDD) Calculator Track heat unit accumulation to predict flowering, grain filling and the likely harvest date of your crop. Solar Irrigation Pump Sizer Calculate total dynamic head, pumping rate, pump horsepower and the solar panel wattage needed for your daily irrigation water.

Protected Cultivation & Nursery Calculators

Nutrient solutions for greenhouses and hydroponics, and planning for plug-tray nurseries.

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Hydroponic & Fertigation EC/pH Calculator Calculate grams of fertilizer salt for a target nutrient ppm, the acid needed to bring down pH, and the ppm equivalent of your target EC. Nursery Seedling Tray Calculator Determine the pro-trays, cells, seeds and cocopeat or perlite needed to raise seedlings for your field.

Agri-Finance & Market Calculators

Kisan Credit Card limits and interest, crop insurance premium and claims, and mandi selling margins.

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KCC Loan Limit & Interest Calculator Calculate your eligible Kisan Credit Card short-term limit from the Scale of Finance, and the interest you save with prompt repayment (effective 4%). PMFBY Crop Insurance Calculator Find your farmer premium share (1.5%, 2% or 5%) under PMFBY and estimate the claim payout from a notified yield shortfall. Mandi Arbitrage & Transport Cost Calculator Compare the local farm-gate price with a distant APMC mandi rate after freight, labour, market fees, commission and transit loss.