Plant engineering calculator · Updated 17 September 2026
Cooling Tower Drift Loss Calculator — Drift Rate, Annual Water & Solids Carryover
Calculate drift water loss from circulation and drift percentage, with annual volume and dissolved-solids carryover from cycles/TDS input.
Inputs
Live results
- Drift loss 0.05 m³/h
- Annual drift water 300 m³
- Dissolved-solids carryover 0.1 kg/h
Formula
D=circulation×drift%; solids=D×TDS.
Worked example
1,000 m³/h circulation at 0.005% drift loses 0.05 m³/h.
Assumptions and limits
- Use the eliminator/vendor guaranteed drift rate where available.
- This is distinct from evaporation and blowdown.
FAQs
What does this Cooling Tower Drift Loss Calculator calculate?
Calculate drift water loss from circulation and drift percentage, with annual volume and dissolved-solids carryover from cycles/TDS input.
What should I verify before final design?
Verify measured operating data, fluid properties, equipment curves, safety margins and the applicable OEM or engineering standard.
Why are intermediate results shown?
They expose assumptions and make unit, load and operating-condition errors easier to catch.