🏊 Pool Calculator
Calculate pool volume for chemical dosing and water management
How to Use This Calculator
Select Pool Shape
Choose your pool shape: Rectangular, Circular/Round, or Oval.
Enter Pool Dimensions
Input pool dimensions based on shape: length and width for rectangular/oval, or diameter for circular pools.
Enter Pool Depth
Choose constant depth or variable depth. For variable depth, enter shallow end and deep end depths. The calculator averages them.
Calculate and Review
Click "Calculate Pool Volume" to see pool volume in gallons, liters, cubic feet, and cubic meters. Use this for chemical dosing and water management.
Formula
Rectangular: V = Length × Width × Depth
Circular: V = π × r² × Depth
Variable Depth: V = Length × Width × Average Depth
Example: Rectangular pool, 30 ft × 15 ft, constant 5 ft depth
Step 1: Volume = 30 × 15 × 5 = 2,250 cubic feet
Step 2: Gallons = 2,250 × 7.48052 = 16,831 gallons
Example: Circular pool, 20 ft diameter, 5 ft depth
Step 1: Radius = 20 / 2 = 10 feet
Step 2: Volume = π × 10² × 5 = 1,571 cubic feet
Step 3: Gallons = 1,571 × 7.48052 = 11,758 gallons
About Pool Calculator
The Pool Calculator is an essential tool for pool owners, pool service professionals, and contractors who need to calculate pool volume. This calculator eliminates guesswork by providing precise volume calculations for rectangular, circular, and oval pools, helping you determine proper chemical dosing, water replacement needs, and maintenance requirements.
When to Use This Calculator
- Chemical Dosing: Calculate pool volume for accurate chemical dosing (chlorine, pH adjusters, etc.)
- Water Management: Determine water replacement and refill volumes
- Pool Maintenance: Calculate volumes for cleaning, heating, and filtration
- Cost Estimation: Estimate water costs and chemical costs based on volume
- Equipment Sizing: Size pool pumps, heaters, and filters based on volume
Why Use Our Calculator?
- ✅ Accurate Calculations: Precise volume calculations using standard geometric formulas
- ✅ Multiple Shapes: Supports rectangular, circular, and oval pools
- ✅ Variable Depth: Handles pools with shallow and deep ends
- ✅ Multiple Units: Shows volume in gallons, liters, cubic feet, and cubic meters
- ✅ Time Savings: Instant calculations eliminate manual math
Understanding Pool Volume
Volume Calculation: Pool volume is calculated using geometric formulas based on pool shape. For rectangular pools, volume = length × width × depth. For circular pools, volume = π × radius² × depth. For variable depth pools, the calculator averages shallow and deep depths.
Chemical Dosing: Pool chemicals are typically dosed per 10,000 gallons of water. Knowing your exact pool volume helps ensure proper chemical balance and prevents over- or under-dosing, which can damage pool surfaces or fail to maintain water quality.
Tips for Best Results
- Measure Accurately: Use accurate pool measurements for precise volume calculations
- Account for Steps: For pools with large steps, subtract step volume or measure separately
- Variable Depth: For pools with varying depth, measure shallow and deep end separately
- Chemical Dosing: Always use exact volume for chemical calculations to avoid damage
- Safety Margin: Consider slight volume adjustments for actual water level variations
Frequently Asked Questions
How do I calculate pool volume?
For rectangular pools: Volume = Length × Width × Depth. For circular pools: Volume = π × (Diameter/2)² × Depth. The calculator performs these calculations automatically based on your pool dimensions.
How many gallons is my pool?
Enter your pool dimensions (length, width, depth or diameter, depth) and the calculator will show volume in gallons. A typical 30×15×5 ft pool holds about 16,800 gallons.
How do I calculate volume for a pool with shallow and deep ends?
Select "Variable Depth" and enter shallow end depth and deep end depth. The calculator averages these depths to calculate volume. This provides an accurate estimate for chemical dosing.
Why do I need to know pool volume?
Pool volume is essential for accurate chemical dosing. Most pool chemicals are dosed per 10,000 gallons. Knowing exact volume prevents over-dosing (which can damage surfaces) or under-dosing (which fails to maintain water quality).
Can I use this for above-ground pools?
Yes! The calculator works for both in-ground and above-ground pools. Just enter the actual dimensions of your pool, regardless of installation type.