Pool Shock Calculator
Calculate the exact amount of pool shock (calcium hypochlorite) needed to raise free chlorine levels to shock your pool based on pool volume, current chlorine level, and target chlorine level.
Published by:
isCalculator Editorial Team
Was this calculator helpful?
How to use this tool?
How to Use the Pool Shock Calculator
- Enter Pool Volume – Input your pool’s total capacity in gallons (e.g., 10,000).
- Enter Current Free Chlorine – Provide the current chlorine level in ppm (e.g., 1.0).
- Enter Target Free Chlorine – Set the desired chlorine level in ppm (must be higher than current).
- Select Shock Strength – Choose the percentage of available chlorine in your shock product (e.g., 73% for Cal Hypo).
- Click “Calculate” – The tool will compute the exact amount of shock needed in ounces and pounds.
Important Notes:
- All measurements are in imperial units (gallons, ppm, ounces).
- Target chlorine must be greater than current chlorine.
- The result includes a formula breakdown for verification.
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
Pool shocking is the process of raising free chlorine levels to sanitize the pool, kill algae, and break down chloramines.
The amount depends on pool volume, current chlorine level, target chlorine level, and shock strength. Use this calculator for precise measurement.
Common pool shock (calcium hypochlorite) has 65% to 78% available chlorine. Dichlor is 100% but less common for shocking.