Free Professional Pool Tools + Newsletter

KNOW YOUR
POOL.
STOP THE LEAK.

Two free weather-based pool calculators for pool technicians, real estate agents, property managers, home inspectors, and homeowners. Plus — join the HUNTER LeakClub newsletter.

☀️ Pool Evaporation Calculator ↓ 🔍 Pool Leak Calculator ↓
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Tool 01 of 02
POOL EVAPORATION CALCULATOR
☀️
Evaporation Calculator · Meyer Formula · Real Weather

How Much Is Your Pool Losing to Evaporation?

Enter your ZIP code and water temperature. The tool fetches live local weather and calculates your pool's daily evaporation rate — plus weekly, monthly, and yearly projections.

01
Enter ZIP code
Auto-fetches real local weather data
02
Enter water temp
Quick thermometer reading drives the formula
03
Set conditions
Shade, wind shelter, cover, water features
04
Get your rate
Daily, weekly, monthly, yearly evaporation
☀️
Pool Evaporation Calculator
Real Weather · Meyer Formula · Leak Business Academy
📍
Location & Water Temperature
US ZIP codes only
Valid 5-digit ZIP required.
Actual thermometer reading
Temp required (40–110°F).
⚙️
Pool Conditions
Evaporation Results
Air Temp
—
°F
Humidity
—
%
Wind Speed
—
mph
Daily Evaporation Rate
—
inches per day
💧—
Per Week
—
inches
Per Month
—
inches
Per Year
—
inches
Contributing Factors
🌡️
Vapor Pressure
—
💨
Wind Effect
—
☀️
Solar Load
—
🌊
Water Movement
—
📡 Live Weather Data
Location
—
Source
Open-Meteo API
Air Temp
—
Dew Point
—
Humidity
—
Wind
—
Pressure
—
Water Temp
—
🔍
Now Check for a Pool Leak
Use the Pool Leak Calculator below — compare against your measured water loss
↓
Note: Estimates use Meyer formula and real weather data. Results for reference only.
Tool 02 of 02
POOL LEAK CALCULATOR
🔍
4-Step Wizard · Real Weather · Leak vs. Evaporation

Is Your Pool Leaking or Just Evaporating?

Measure your water drop over several days, enter your dates and ZIP code — the tool fetches real historical weather and tells you whether your loss is normal evaporation or a potential leak. Confidence score included.

01
Location & water temp
ZIP code pulls historical weather for your dates
02
Pool conditions
Sun, wind, cover, and movement factors
03
Your measured drop
Dates + total inches lost. Rain auto-adjusted.
04
Get your verdict
Leak likely / possible / no leak — with confidence score
💧 Leak Business Academy

Pool Leak Calculator

Compare real weather-based evaporation against your measured water loss to find out if your pool has a leak.

1
Location
2
Conditions
3
Water Loss
4
Pool Size
📍
Location & Water Temperature
Step 1 of 4
US ZIP codes only
Valid 5-digit ZIP required.
Actual thermometer reading
Temp required (40–110°F).
⚙️
Pool Conditions
Step 2 of 4
📏
Measured Water Loss
Step 3 of 4 — rainfall fetched automatically
Start date required.
End date required.
Select start and end dates above
Measure from your mark to current water level
Measured water drop is required.
💡 How to Measure
  1. Mark water level with tape on pool wall (or use skimmer).
  2. Turn off auto-fill valve — it masks real water loss.
  3. On end date, measure total drop from your mark.
  4. Rainfall is fetched automatically.
📐
Pool Dimensions
Step 4 of 4 — for gallon estimates only
Optional

Entering dimensions shows estimated gallons lost per day. Skipping does not affect the leak verdict.

Expected Evaporation
—
in / day
Unexplained Loss
—
in / day
✅
—
—
Measurement Confidence
—
Measured Loss / Day
—
Unexplained Loss / Day
—
Total Unexplained Loss
—
Rainfall (Auto-Fetched)
—
Measurement Window
—
📡 Weather Data — Averaged Over Measurement Period
Location
—
Total Rainfall
—
Avg Air Temp
—
Avg Dew Point
—
Avg Wind
—
Avg Pressure
—
Days Analyzed
—
Data Source
Open-Meteo Archive
What To Do Next
  1. Fill a bucket with pool water to about 1 inch from top.
  2. Place on a pool step submerged to the same depth as the pool waterline. Mark both levels.
  3. Turn off pump and auto-fill. Wait 24–48 hours.
  4. If pool dropped more than bucket → likely a leak. If equal → evaporation.
Disclaimer: Estimates based on historical weather and user measurements. Always consult a licensed pool leak detection professional for confirmed diagnosis.
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☀️ Normal Pool Evaporation Reference

ConditionsDaily LossWeeklyNotes
Cool, calm, humid⅛ – ¼ in¾ – 1¾ inOvercast, low wind
Typical warm day¼ – ½ in1¾ – 3½ inAverage US conditions
Hot, dry, windy½ – 1 in+3½ – 7+ inFL summer, Southwest
Active water featuresAdd 25–50%VariesWaterfalls, fountains, zero-edge
Pool cover in useNear zeroNear zeroSolid cover = 90%+ reduction

⚠️ Signs Your Pool May Be Leaking

  • Losing more than ½ inch per day consistently
  • Refilling more than once a week
  • Water level stops at the same point every time
  • Wet or sunken soil around the pool deck
  • Cracks in the shell, tile, coping, or deck
  • Air bubbles coming from return jets
  • Unexplained jump in your water bill
  • Equipment losing prime or running dry

🗺️ Common Pool Leak Locations

  • Skimmer housing — most common
  • Return fittings and eyeball fittings
  • Pool light niches and conduit
  • Main drain fittings
  • Underground plumbing lines
  • Structural cracks in shell or tile
  • Equipment pad connections
  • Spa spillover and bond beam

🪣 The Bucket Test — Confirm a Leak in 48 Hours

01
Fill a bucket
Place on a pool step submerged to the same depth. Mark both water levels. Turn off pump and auto-fill.
02
Wait 24–48 hours
Do not add water or run the system. Let evaporation happen naturally to both the bucket and the pool.
03
Compare the drops
Pool dropped more than bucket = likely a leak. Both dropped equally = normal evaporation.
Frequently Asked Questions
POOL LEAK FAQ
QHow much water should a pool lose per day?▾
Most pools lose ¼ to ½ inch per day through normal evaporation. Hot, dry, and windy conditions push this higher. Cool, calm, humid conditions bring it down. A pool cover can cut evaporation by 90% or more. Use the Evaporation Calculator above for an accurate estimate based on your actual local weather.
QHow do I know if my pool is leaking or just evaporating?▾
Measure your water level over 5–14 days and compare it to weather-based evaporation for your location. The Pool Leak Calculator above does this automatically using real historical weather data. The Bucket Test is also reliable — if the pool drops more than the bucket, the excess is structural water loss.
QWhat is the most accurate way to measure pool water loss?▾
Turn off your auto-fill valve first — this is critical. Auto-fill hides real water loss completely. Mark your water level, wait 5–14 days, then measure the total drop in inches. Enter your start date, end date, and drop into the Pool Leak Calculator. Rainfall is fetched and adjusted automatically.
QDoes rain affect the measurement?▾
Yes — rainfall raises the pool level and masks real water loss. The Pool Leak Calculator automatically retrieves rainfall data for your ZIP code and measurement dates and adjusts the calculation. You don't need to account for rain manually.
QWhen should I call a pool leak detection professional?▾
Call a pro if your pool consistently loses more than ½ inch per day, if the Pool Leak Calculator shows a likely leak over a 7+ day window, if the Bucket Test shows the pool dropping significantly more than the bucket, or if you see wet soil, cracks, or sunken decking. Don't delay — undetected leaks cause structural damage that costs far more to fix than the leak itself.
QWhat is the Meyer evaporation formula?▾
The Meyer open-water formula calculates evaporation from vapor pressure difference between the water surface and air, driven by wind: E = 0.50 × (ew − ea) × (1 + wind/16). Vapor pressures are calculated in inHg from real temperature and dew point readings. Because these tools average multi-day hourly weather data including overnight, results may read slightly lower than peak-condition estimators — this is accurate and by design.
QWho is HUNTER LeakClub for?▾
Anyone who works with pools or owns one. Pool technicians, real estate agents, property managers, home inspectors, pool contractors, and homeowners all use these tools and benefit from the newsletter. If you need to know whether a pool is leaking or just evaporating — this is for you.

🎓 About Leak Business Academy

Leak Business Academy was created by professional pool leak detection experts with decades of real field experience across Southeast Florida and beyond. Training is built on the H.U.N.T.E.R. Detection System — a field-proven, systematic approach for locating leaks quickly and accurately without damaging the pool structure.

These free tools were built to give homeowners, agents, inspectors, and technicians a professional-grade starting point before committing to a full inspection.

🏠 Leak Business Academy → ✉️ PooleakAnalyzer@yahoo.com
Disclaimer: These tools are for informational purposes only. Estimates are based on weather data and mathematical models — actual pool evaporation varies. Not a substitute for professional leak detection. Always consult a licensed professional for confirmed diagnosis and repair. Leak & Subsurface Locators, Inc. · Southeast Florida.