Well Volume Calculator
Calculate the volume of water in your cylindrical well for sampling and maintenance 💧
🏗️ Well dimensions
The diameter of your cylindrical well
The complete depth from surface to bottom of well
The depth from surface to water level (depth to water)
💧 Well volume
Calculation Details
Water column height: 15.00 m
Well area: 1.77 m²
Formula: Volume = π/4 × diameter² × water_column_height
📋 Example Calculation
Residential Well Example
Well diameter: 6 inches (0.15 m)
Total well depth: 100 feet (30.48 m)
Static water depth: 20 feet (6.10 m)
Water column height: 80 feet (24.38 m)
Calculation Result
Well volume = π/4 × (0.15)² × 24.38
Well volume = 0.785 × 0.0225 × 24.38
Well volume = 0.43 m³ (430 liters)
Three well volumes = 1.29 m³ (1,290 liters)
📏 Measurement Tips
Measure well diameter at the top opening
Use a weighted string to measure depths
Ensure all measurements use the same units
Static water depth is depth TO water, not OF water
🎯 Why Calculate Well Volume?
📊 Quick Reference
Formula: π/4 × D² × H
D = diameter, H = water column height
Sampling: Always pump 3× well volume
Ensures representative water sample
Typical well: 6" diameter, 100' deep
Residential well specifications
Understanding Well Volume Calculations
Why Calculate Well Volume?
Knowing your well volume is crucial for several practical applications. Most importantly, it helps determine how much water to pump when sampling for water quality testing. Environmental regulations typically require pumping at least three times the well volume to ensure you get a representative sample of the groundwater.
Key Applications
- •Water quality sampling and testing
- •Well disinfection and chlorination
- •Calculating pumping requirements
- •Well decommissioning and plugging
Measurement Guidelines
Well Diameter
Measure the internal diameter at the top of the well casing. Most residential wells are 6 inches in diameter, while larger wells can be 8-12 inches or more.
Total Well Depth
Use a weighted tape or string to measure from the surface to the bottom of the well. This represents the total constructed depth of your well.
Static Water Level
Measure the depth from surface to the water level when the well is at rest (not being pumped). This determines how much of the well contains water.