Free Farming Tools & Calculators – CropBuddy
Free online calculators for farmers: acreage, planting dates, NPK fertilizer rates, and harvest yield. No signup, instant results.
Available calculators
- Acreage Calculator — Estimate field area in acres from dimensions in feet or a map.
- Grain Bin Capacity Calculator — Flat-bottom round bin volume in cubic feet and US volume bushels.
- Acres Per Hour Calculator — Estimate acres per hour, daily acres, and field days.
- Planting Date Calculator — Optimal planting windows by crop and frost date.
- NPK Fertilizer Calculator — Calculate nitrogen, phosphorus, and potassium per acre.
- Harvest Yield Calculator — Estimate corn, soybean, and wheat yield per acre.
- Irrigation Calculator — Gallons per acre and pump hours for pivot, drip, flood.
- Seed Rate Calculator — Seeds, bags, and seed cost per acre.
- Grain Market Price Tracker — Reference grain futures quotes per bushel; may be delayed, not local cash bids.