Pool Chlorine Calculator

This calculator determines the amount of chlorine needed to achieve and maintain proper sanitization levels in your pool.

Formula Used:

Chlorine Amount = (Pool Volume x PPM Increase x 8.33) / (% Available Chlorine x 100)

Ideal Chlorine Levels:

• • Free Chlorine: 1.0 - 3.0 ppm
• • Combined Chlorine: less than 0.2 ppm
• • Total Chlorine: Free + Combined

Chlorine Types & Strengths:

• • Liquid Chlorine: 12.5% available chlorine
• • Cal-Hypo powder: 70% available chlorine
• • Dichlor granular: 62% available chlorine
• • Trichlor tablets: 90% available chlorine

Dosing Guidelines:

• • Test chlorine levels 2-3 times per week
• • Add chlorine in evening/night
• • Distribute evenly around pool perimeter
• • Run pump for 8+ hours after adding
• • Wait 15 minutes before swimming

Factors Affecting Chlorine:

• • Sunlight degrades chlorine quickly
• • High temperatures increase consumption
• • Heavy bather loads deplete chlorine
• • Rain and debris consume chlorine
• • Poor circulation reduces effectiveness

Safety Notes:

• • Never mix different chlorine types
• • Store chemicals in cool, dry place
• • Keep away from acids and other chemicals
• • Use appropriate measuring tools