AnythingOnline / Free calculators and utilities

Agriculture & Environment calculators

Choose a task below. Check each calculator’s assumptions and units before using its result.

Solar Water Pumping System (TDH & Solar Array Wattage) Calculator | AnythingOnline

Free solar water pumping calculator. Compute Total Dynamic Head (TDH), pipe friction losses, required flow rate (GPM), and solar PV panel array wattage for livestock and irrigation.

Sprayer Calibration & Nozzle Flow Rate (GPA) Calculator | AnythingOnline

Free agricultural sprayer calibration calculator. Calculate gallons per acre (GPA), single nozzle GPM and OPM jar catch volume, tractor travel speed, and PSI adjustments.

Thermal Oxidizer Calculator - Residence Time Destruction

Size industrial direct-fired thermal oxidizers (DFTO) for 99%+ VOC destruction: calculate chamber volume, high-temperature residence time, auxiliary fuel duty, and flue gas flow.

Ultrafiltration Flux Calculator - TMP Membrane Sizing

Calculate ultrafiltration Transmembrane Pressure (TMP), operating permeate flux (LMH & GFD), 20°C temperature-normalized permeability, and backwash triggers.

Wastewater Chlorine CT Calculator - Dosage & Disinfection

Determine chlorine feed rate in lbs/day and gallons/day, contact chamber detention time, chlorine demand, and regulatory CT values for pathogen inactivation.

Wet Scrubber NTU Calculator - Packing Depth Sizing

Determine Number of Transfer Units (NTU), packed bed depth (Z), liquid-to-gas ratio (L/G), and pressure drop for chemical packed tower absorption scrubbers.