Glycol Dilution
Also known as glycol mix ratio · how much glycol to add
Enter your known values, leave one input blank, and solves for the missing one. Try different units for next level excitement!
Learning zone
The dilution equation works because the amount of glycol never changes — only the water around it. Sizing a hydronic loop for 35% propylene glycol from 95% concentrate? Solve for V₁ to find how much concentrate to add for your system volume, then top up with water to V₂.
Field notes: always verify the final mix with a refractometer, and remember that freeze protection is not linear with concentration — consult the glycol manufacturer's burst/freeze tables for the target percentage.
Glycol Dilution
Where
- = Starting concentration
- = Concentrate volume
- = Target concentration
- = Final volume
Missing one of these? Work it out first, then come back
- Starting concentration — BOD Mass Loading, Dose Achieved from Chemical Added
- Concentrate volume — Density, Molarity (C = n/V)
- Target concentration — Closed Loop Slug Dose Volume, BOD Mass Loading
- Final volume — Dilution Equation (C1V1 = C2V2), Boyle's Law