Evaporation Estimator Guide
This calculator estimates daily evaporation using air temperature, water temperature, humidity, wind speed, pool surface area, and cover usage. The result is a practical estimate, not an exact measurement.
Why It Matters
- Estimate normal water loss.
- Spot possible leaks when water loss is excessive.
- Plan makeup water usage.
- Reduce unnecessary chemical dilution.
Typical Water Loss
Many pools lose about 1/8 to 1/4 inch per day during warm weather. Hot, windy, dry conditions can produce significantly higher evaporation, while a quality cover can greatly reduce water loss.
Common Mistakes
- Assuming every drop in water level is evaporation.
- Ignoring splash-out and backwashing.
- Not considering wind and humidity.
- Forgetting that leaks can mimic evaporation.
Pool Gal Pro Tip 💦
If you're adding water every few days, compare estimated evaporation with actual water loss. If the numbers don't match, run a bucket test before assuming the weather is responsible.
If you're adding water every few days, compare estimated evaporation with actual water loss. If the numbers don't match, run a bucket test before assuming the weather is responsible.