Pool Chemical Calculator
Calculate chlorine and other chemicals needed for your pool volume.
Supports gallons and liters.
Enter your pool volume and desired chlorine level to calculate chemical amounts.
Pool chemicals are dosed based on pool volume and target concentration in ppm.
Chlorine dosing formula:
- Grams needed = (Volume in liters × Target ppm) / (% active chlorine × 10)
- Ounces needed = Grams / 28.3495
Common chlorine products:
| Product | Active Chlorine |
|---|---|
| Liquid bleach (12.5%) | 12.5% |
| Calcium hypochlorite | 65-73% |
| Sodium dichlor | 56-62% |
| Trichlor tablets | 90% |
Ideal chlorine levels:
- Free chlorine: 1-3 ppm (residential pools)
- Shock treatment: 10-30 ppm (superchlorination)
Pool volume estimation:
- Rectangular: Length × Width × Avg Depth × 7.48 (gallons) or × 1000 (liters if in meters)
- Round: Diameter² × Avg Depth × 5.9 (gallons)
Volume conversions:
- 1 US gallon = 3.785 liters
- 1,000 gallons = 3,785 liters
To raise chlorine by 1 ppm in 10,000 gallons:
- Liquid bleach (12.5%): ~10 fl oz (296 mL)
- Cal-hypo (65%): ~2 oz (57 g)
- Trichlor (90%): ~1.5 oz (43 g)