Swimming Pool Length Calculator
Calculate accurate swimming pool length in feet for various pool shapes to help with planning, installation, and maintenance.
Select Pool Shape
Rectangle
Oval
Kidney
L-Shape
Enter Pool Dimensions
Pool Preview
20 ft × 10 ft
Pool Length
20.0 feet
In Meters
6.10 meters
In Yards
6.67 yards
Additional Pool Calculations
Pool Area
200 sq ft
The total surface area of your pool
Perimeter
60 feet
The distance around the pool edge
Lap Count
To swim 1/4 mile
7 laps
To swim 1 mile
26 laps
Volume
1,000 cubic feet
7,480 gallons
Used for calculating chemical treatments and water costs
Heating Estimate
To raise temperature by 1°F:
62,300 BTU
Based on average water volume and standard heating calculations
Standard Pool Sizes Reference
| Pool Type | Length (ft) | Width (ft) | Common Use |
|---|---|---|---|
| Olympic Pool | 164.0 | 82.0 | Competition |
| Short Course Competition | 82.0 | 41.0 | College/High School |
| Recreational Lap Pool | 75.0 | 25.0 | Fitness/Exercise |
| Large Residential | 40.0 | 20.0 | Family Leisure |
| Medium Residential | 32.0 | 16.0 | Family Leisure |
| Small Residential | 24.0 | 12.0 | Family Leisure |
| Plunge Pool | 10.0 – 15.0 | 6.0 – 10.0 | Small Yards |
| Swim Spa | 12.0 – 18.0 | 7.0 – 8.0 | Exercise/Therapy |
Swimming Pool Length FAQs
How is swimming pool length measured?
Swimming pool length is typically measured along the longest straight line from one end of the pool to the other. For rectangular pools, this is straightforward. For irregularly shaped pools like kidney or L-shaped pools, the maximum length is used as the official measurement.
What is a standard lap pool length?
Standard competitive lap pools are 25 yards (75 feet), 25 meters (82 feet), or 50 meters (164 feet) long. Residential lap pools are typically 40-50 feet long, which is considered the minimum length for effective lap swimming.
How do I calculate the number of laps for a mile?
To calculate how many laps equal a mile in your pool, divide 5,280 (the number of feet in a mile) by twice your pool length (since one lap is down and back). For example, in a 40-foot pool: 5,280 ÷ (40 × 2) = 66 laps.
What is the minimum pool length for effective swimming?
For recreational swimming, a minimum length of 20-25 feet is recommended. For lap swimming and exercise, a minimum of 30-35 feet is preferred, though 40+ feet is ideal to prevent too many turns.
How does pool length affect construction costs?
Pool construction costs increase with size, but not proportionally. A longer pool requires more materials, excavation, and water treatment capacity. However, the increase in cost is typically less than the percentage increase in length due to fixed costs like equipment and design.