Free Online Water Calculators

General Water Calculators

• Pressure Calculator
• Tank Fill Time Calculator
• Water Volume (Pool / Pond) Calculator
• Water Bill Estimator
• Water Softener Sizing Calculator

Pool Calculators

• Pool Chlorine Dosage Calculator
• Pool Volume
• Pool Salt Addition Calculator
• Pool Alkalinity Adjustment Calculator
• Pool Calcium Hardness Increase Calculator

Rainwater Harvesting Calculators

• Rainwater Collection Calculator
• Rainwater System Storage Sizing Calculator

Water Treatment Calculators

• Chemical Dosing Calculator (dosage formula)
• CT Value Calculator (coming soon)
• Detention Time (coming soon)
• Pump Horsepower (coming soon)
• Filter Backwash Rate (coming soon)