McCabe-Thiele Calculator: Stages and Minimum Reflux
Wired White v3 Design a binary distillation column with real ethanol–water VLE, azeotrope limits, animated stage stepping, minimum reflux, and Fenske–Underwood–Gilliland comparisons.
Water and process
Water treatment and process engineering: softeners, septic systems, disinfection contact time, cooling towers, compressed air and distillation columns. Each calc shows its method and published sources.
Wired White v3 
Drinking-Water Chlorine CT and Contact Tank Calculator
Wired White v3 Calculate chlorine CT, T10 from a baffling factor, required contact-tank volume and maximum flow. Compare a Giardia log target with EPA tables and explore an illustrative tracer response.
Cooling Tower Makeup Water and Cycles of Concentration
Wired White v3 Calculate cooling tower evaporation, drift, blowdown and makeup water. Compare cycles of concentration with an LSI scaling screen, range and approach.
Air Compressor Size, Receiver Tank and Leak Cost Calculator
Wired White v3 Size compressor free-air delivery and receiver storage from demand, duty cycle and pressure band. Estimate leak flow and electricity cost at your tariff.
Water Softener Size Calculator: Salt and Regeneration
Wired White v3 Size a resin bed from hardness, iron and water demand. Compare salt doses, regeneration intervals, yearly salt and water use, and sodium added.
Septic Tank Size Calculator, Drain Field & Pump-Out Interval
Wired White v3 Estimate septic tank capacity, drain field size and pump-out timing. Compare published maintenance intervals with sludge and scum growth, with metric and US units.
Rainwater Harvesting Calculator & Water Tank Size
Wired White v2 Size rainwater and outage storage with a daily water balance. Compare tank capacity, demand coverage, overflow and refill time, and animate a full year of tank levels.