Swimming Pool Shock Calculator
Calculate the precise amount of shock treatment needed to maintain perfect water chemistry in your swimming pool. This advanced calculator works for pools worldwide and accounts for all critical factors.
Calculate Pool Shock Requirements
Shock Treatment Results
Required Chlorine Increase:
0 ppm
Amount of Shock Needed:
0
Recommended Shock Level:
0 ppm
Breakpoint Chlorination:
0 ppm
Chlorine Impact Projection
Important Notes
- Shock your pool in the evening or at night for maximum effectiveness
- Run your pool pump for at least 6 hours after shocking
- Wait until chlorine levels drop below 5 ppm before swimming
- Test water chemistry 24 hours after shocking
Pool Chemistry Standards & Information
Free Chlorine (FC)
Free Chlorine is the active sanitizer that eliminates contaminants in your pool water. Maintaining proper FC levels is critical for swimmer safety and water clarity.
- Ideal Range: 2-4 ppm
- Shock Level: 10-30 ppm (based on CYA levels)
- Test Frequency: 2-3 times per week
Cyanuric Acid (CYA)
Cyanuric Acid protects chlorine from UV degradation. However, high CYA levels reduce chlorine's effectiveness, requiring higher chlorine levels.
- Ideal Range: 30-50 ppm
- Max Recommended: 80 ppm
- Shock Ratio: Minimum 7.5% of CYA level
Shock Treatment Types
- Cal-Hypo (Calcium Hypochlorite): 65-73% chlorine, adds calcium
- Sodium Dichlor: 56% chlorine, adds CYA
- Liquid Chlorine: 10-12.5% chlorine, no additives
- Non-Chlorine Shock: Potassium peroxymonosulfate, oxidizes without chlorine
International Pool Chemistry Standards
| Parameter | USA Standards | EU Standards | Australia Standards | Canada Standards |
|---|---|---|---|---|
| Free Chlorine (ppm) | 2.0-4.0 | 1.0-3.0 | 2.0-4.0 | 1.0-3.0 |
| pH Level | 7.2-7.8 | 7.0-7.6 | 7.2-7.8 | 7.2-7.8 |
| Cyanuric Acid (ppm) | 30-50 | 20-30 | 30-50 | 30-50 |
| Total Alkalinity (ppm) | 80-120 | 80-120 | 80-120 | 80-120 |
| Calcium Hardness (ppm) | 200-400 | 150-250 | 100-200 | 150-250 |