5 calculators in this category
- Crop Water Requirement (ETc) CalculatorFAO Irrigation and Drainage Paper 56, single crop coefficientCrop water use is reference evapotranspiration multiplied by a crop coefficient, and this calculator takes that product all the…
- Irrigation Run Time CalculatorIrrigation Association audit methodThis calculator answers the only irrigation question most people actually have: how many minutes should this zone run? Give it…
- Drip Irrigation Flow Rate & Run Time CalculatorASABE EP405.1, Design and Installation of Microirrigation SystemsA drip zone is only as good as its flow arithmetic: too many emitters on one valve and the far end starves, too few and the run…
- Sprinkler Precipitation Rate CalculatorIrrigation Association precipitation-rate method (96.3 constant)Precipitation rate is how fast a sprinkler zone applies water, in inches per hour, and it is the number that turns a watering…
- Pond Volume & Acre-Feet CalculatorAcre-foot volumetric methodAlmost every decision about a pond is priced per acre or per acre-foot: fish stocking rates and liming are per surface acre…
Which one do you need?
- Crop Water Requirement (ETc) Calculator
- Estimate crop water use from reference ET and a growth-stage crop coefficient, then convert it to net and gross irrigation depth, gallons, acre-feet and pump GPM.
- Irrigation Run Time Calculator
- Turn a target watering depth into minutes per zone. Enter zone GPM and area, or a known precipitation rate, and get run time, soak cycles and gallons used.
- Drip Irrigation Flow Rate & Run Time Calculator
- Total emitter or drip tape flow for a zone in GPH and GPM, work out run time from gallons per plant or target depth, and check the zone against your supply flow.
- Sprinkler Precipitation Rate Calculator
- Calculate sprinkler precipitation rate in inches per hour from head flow and spacing or a catch-can test, with run time, uniformity and runoff warning.
- Pond Volume & Acre-Feet Calculator
- Estimate farm pond surface acres, average depth, acre-feet and gallons from length, width and depth for stocking, aeration sizing and chemical treatment rates.