Swimming Pool Water Loss Calculator
Calculate your pool's water loss due to evaporation, splash-out, and backwash. This tool helps pool owners worldwide understand and manage water consumption based on environmental conditions and pool characteristics.
Pool Information
Environmental Factors
Water Loss Results
Based on your inputs, here's the estimated water loss for your swimming pool. These figures account for evaporation, splash-out, and backwash water replacement.
Water Conservation Tips
- Use a pool cover when not in use (reduces evaporation by 70-90%)
- Maintain proper chemical balance to reduce backwashing needs
- Consider windbreaks to reduce evaporation
- Repair leaks promptly
Water Loss Over Time
Understanding Pool Water Loss Factors
Water loss in swimming pools occurs through evaporation, splash-out, backwashing, and leaks. Understanding these factors helps with conservation efforts and cost management.
Evaporation
Evaporation accounts for 60-70% of pool water loss. It increases with:
- Higher water temperature
- Lower air humidity
- Increased wind exposure
- Larger pool surface area
Hot, dry, windy conditions can cause up to 2.5 cm (1 inch) of water loss daily.
Splash-out
Splash-out accounts for 15-25% of water loss and depends on:
- Number of swimmers
- Type of activities
- Pool design (infinity edges lose more)
- Water level management
Commercial pools can lose 10-30 liters per swimmer through splash-out.
Backwashing
Filter cleaning accounts for 10-20% of water loss:
- Sand filters require weekly backwashing
- Diatomaceous earth (DE) filters need less frequent cleaning
- Cartridge filters conserve the most water
A single backwash can use 500-2000 liters depending on filter size.
Global Water Loss Standards
| Country/Region | Average Daily Loss | Annual Water Use | Conservation Measures |
|---|---|---|---|
| USA | 0.6-1.25 cm/day | 40,000-80,000 L | Pool covers mandatory in some states |
| Australia | 0.8-1.8 cm/day | 50,000-100,000 L | Water restrictions during droughts |
| Spain | 0.7-1.5 cm/day | 45,000-90,000 L | Common use of pool enclosures |
| UAE | 1.2-2.5 cm/day | 75,000-150,000 L | Mandatory pool covers in new installations |
| UK | 0.5-1.0 cm/day | 30,000-60,000 L | Indoor pools more common |