Pool Chemical Calculator
Calculate chlorine, shock, algaecide, and pH adjuster amounts needed for your pool volume in gallons or liters.
Covers above-ground and in-ground pools.
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)