Farm & Rural calculators
Calculators for the farm and rural property: application rates, blends, and drainage.
- Acreage CalculatorAcres equal the area in square feet divided by 43,560; a 660 ft × 66 ft strip, for example, is exactly one acre.Inputs: Field shape, Length, base, diameter, or first parallel side, Width, height, or second parallel side
- Drain Tile Spacing and Pipe Size CalculatorTile spacing follows the Hooghoudt equation, q L² = 8 K d h + 4 K h², and tile size follows from the flow (acres × drainage coefficient) and Manning's equation at your grade.Inputs: Area drained by this tile line, Drainage coefficient, Soil hydraulic conductivity above the drain
- Dry Spreader Calibration CalculatorApplication rate in pounds per acre equals pounds collected × 43,560 ÷ (swath width × distance driven), in consistent feet.Inputs: Material collected in the test, Swath width, Distance driven in the test
- Fence Materials CalculatorPosts equal the fence length divided by post spacing, rounded up, plus one for an open run; wire equals length × strands plus waste.Inputs: Total fence length, Post spacing, Layout
- Fertilizer N-P-K Blend CalculatorPounds of product per acre = pounds of nutrient wanted ÷ (the product's percent nutrient ÷ 100); phosphate products such as DAP also supply nitrogen, which you subtract before figuring the nitrogen source.Inputs: Nitrogen wanted, Phosphate wanted, Potash wanted
- Grain Bin Capacity CalculatorA round bin holds π ÷ 4 × diameter² × depth cubic feet, and one bushel is 1.2445 cubic feet, so a bin holds about 0.6311 × diameter² × depth bushels, plus the peaked top.Inputs: Bin diameter, Depth of grain at the wall, Peak height above the level fill
- Grain Moisture Shrink CalculatorWater shrink equals (initial moisture − final moisture) ÷ (100 − final moisture); drying corn from 25% to 15.5% loses about 11.2% of its weight.Inputs: Crop, Wet grain, Initial moisture
- Pond Volume CalculatorPond volume equals surface area times average depth; one acre-foot is 43,560 cubic feet or 325,851 gallons.Inputs: Pond shape, Length, or diameter of a circle, Width
- Seeding Rate CalculatorBulk seeding rate = target PLS rate ÷ (purity × germination), so lower-quality seed means more pounds per acre.Inputs: My target is, Target PLS rate, Target seeds per square foot
- Sprayer Calibration CalculatorGallons per acre = nozzle flow (gpm) × 5,940 ÷ (speed in mph × nozzle spacing in inches).Inputs: Flow per nozzle, Ground speed, Nozzle spacing
- Sprayer Tank Mix CalculatorAcres per tank = tank size ÷ carrier rate (gal/acre), and product per tank = label rate per acre × acres per tank.Inputs: Tank size, Carrier rate, Label rate per acre