Conversion factors
- 1 m³/hr = 1,000 LPH = 16.67 LPM = 24 KLD = 4.403 US GPM = 6,340 US GPD.
- TDS (ppm) ≈ conductivity (µS/cm) × factor. The factor is 0.5 to 0.7 depending on the salts; 0.64 is a common default for natural water.
- 1 grain per US gallon = 17.12 ppm as CaCO₃; 1 °dH = 17.85 ppm; 1 °fH = 10 ppm.
Related: TDS and conductivity meters, water softener calculator, RO plant calculator.
FAQs
How many LPH is 100 GPD?
About 15.8 LPH, or roughly 380 litres per day.
How do I convert conductivity to TDS?
Multiply conductivity in µS/cm by a factor between 0.5 and 0.7. With 0.64, 1,000 µS/cm is about 640 ppm TDS.
What is 1 KLD?
One kilolitre per day, which is 1 m³ (1,000 litres) per day.