Olympic Swimming Pool Volume
The volume of an Olympic swimming pool is 2,500,000 litres (660,430 US gallons), calculated from the official World Aquatics dimensions of 50 × 25 × 2 metres.
Olympic Swimming Pool Dimensions and Volume
An Olympic swimming pool holds 2,500,000 litres (660,430 US gallons) of water. That figure comes from the official World Aquatics competition standard: 50 metres long, 25 metres wide, and a minimum depth of 2 metres. All measurements follow the SI system in metres — the resulting volume in cubic metres is 2,500 m³.
| Attribute | Measurement |
|---|---|
| Length | 50 m (164.04 ft) |
| Width | 25 m (82.02 ft) |
| Minimum depth | 2 m (6.56 ft) |
| Lanes | 10 × 2.5 m wide |
| Volume | 2,500 m³ |
| Volume in litres | 2,500,000 L |
| Volume in US gallons | 660,430 US gal |
| Volume in imperial gallons | 549,908 imp gal |
The 50 × 25 × 2 m dimensions produce exactly 2,500 cubic metres of water — a figure verified against the current World Aquatics Facilities Rules (FR 2.1). For the same calculation applied to backyard shapes, see pool volume formulas.
World Aquatics specifies minimum depth at 2 m — competition pools are typically built to 3 m to reduce wave turbulence from turns and eliminate depth as a performance variable between lanes.
A 3 m build depth raises the total volume to 3,750,000 litres (990,645 US gallons), a 50% increase over the 2 m minimum. The rectangular pool volume calculator uses the same length × width × depth formula to compute volume for any rectangular pool.
How Olympic Pool Volume Compares to Residential Pools
An olympic size pool volume of 660,430 gallons (2,500,000 litres) puts residential pool sizes into sharp perspective. The bar chart below shows volumes to scale — every residential category appears as a fraction of the Olympic bar.
| Pool Type | US Gallons | Litres | vs Olympic |
|---|---|---|---|
| Olympic pool | 660,430 | 2,500,000 | — |
| Large inground | 30,000 | 113,562 | 1/22 |
| Average inground | 17,500 | 66,245 | 1/38 |
| Small inground | 12,000 | 45,425 | 1/55 |
| Above-ground 24 ft | 11,893 | 45,018 | 1/56 |
| Hot tub / spa | 400 | 1,514 | 1/1,651 |
The average pool volume for a US residential inground pool sits at roughly 17,500 gallons (66,245 litres) — 38 times less water than a single Olympic lane-pool. Browse the full pool volume by size reference to find where your pool falls on this scale.
How Long Does It Take to Fill an Olympic Swimming Pool?
A standard garden hose flowing at 540 US gallons (2,044 litres) per hour needs 1,223 hours — roughly 51 days — to fill an Olympic pool. The arithmetic: 660,430 ÷ 540 = 1,223 hours, divided by 24 = 50.9 days of non-stop flow.
An industrial water supply delivering 10,000 gallons (37,854 litres) per hour cuts that to 66 hours — about 2.75 days: 660,430 ÷ 10,000 = 66.04 hours. For context, the same garden hose fills a typical 15,000-gallon (56,781-litre) home pool in 27.8 hours: 15,000 ÷ 540 = 27.8 hours, or just over one day.
Knowing exact volume also matters for chemical treatment — each 10,000 gallons requires its own dose of chlorine and pH adjuster. The pool chemical dosing guide covers dose rates for any pool size. Use the pool volume calculator to determine your own pool's figure before buying chemicals.
Short Course vs Long Course Pool Volume
A short course pool holds 625,000 litres (165,107 US gallons) — exactly one quarter of the olympic-size swimming pool volume. Short course dimensions are 25 m long × 12.5 m wide × 2 m deep, producing 625 m³ of water. The 25 m length is exactly half the Olympic 50 m track; the 12.5 m width accommodates 5 lanes at 2.5 m each.
Width varies by facility. Some short course pools run 25 m wide (matching the Olympic width) to support 10 lanes, while 6-lane pools narrow to 15 m and 8-lane pools measure 20 m. A 25 × 25 × 2 m short course pool holds 1,250,000 litres (330,215 US gallons) — still half the Olympic volume.
| Pool Type | Dimensions | Volume (L) | Volume (US gal) |
|---|---|---|---|
| Olympic (long course) | 50 × 25 × 2 m | 2,500,000 | 660,430 |
| Short course (5 lanes) | 25 × 12.5 × 2 m | 625,000 | 165,107 |
| Short course (10 lanes) | 25 × 25 × 2 m | 1,250,000 | 330,215 |
Frequently Asked Questions
How much water is in an Olympic swimming pool?
The volume of an Olympic swimming pool is 2,500,000 litres (660,430 US gallons). The Olympic competition pool measures 50 metres long, 25 metres wide, and at least 2 metres deep, producing a total capacity of 2,500 cubic metres. That is roughly 38 times more water than a standard 17,500-gallon (66,245-litre) backyard pool. World Aquatics sets these dimensions as the binding standard for all Olympic and World Championship events.
How many litres does an Olympic pool hold?
2,500,000 litres. The calculation follows directly from the metric dimensions: 50 m × 25 m × 2 m = 2,500 m³, and 1 cubic metre equals 1,000 litres, so 2,500 × 1,000 = 2,500,000 L. In US gallons, that converts to 660,430 gallons (multiply litres by 0.264172). Competition venues that build to a 3 m depth instead of the 2 m minimum hold 3,750,000 litres (990,645 US gallons).
How many times larger is an Olympic pool than a backyard pool?
Between 22 and 56 times larger, depending on the residential pool. A large inground pool holding 30,000 US gallons (113,562 litres) is 1/22 of an Olympic pool's 660,430 gallons (2,500,000 litres). A 24-foot above-ground pool holding 11,893 gallons (45,018 litres) is 1/56 the Olympic volume. The average inground pool in the United States holds roughly 17,500 gallons (66,245 litres), making it 1/38 of an Olympic pool.
What are the official Olympic pool dimensions?
World Aquatics mandates 50 metres in length, 25 metres in width, and a minimum depth of 2 metres. The pool contains 10 lanes, each 2.5 metres wide. These dimensions produce an Olympic pool volume of 2,500 cubic metres — equal to 2,500,000 litres (660,430 US gallons, 549,908 imperial gallons). Pool temperature must remain between 25 °C and 28 °C, and timing touchpads sit at each end wall.
How long does it take to fill an Olympic swimming pool?
51 days with a standard garden hose flowing at 540 gallons (2,044 litres) per hour. The arithmetic: 660,430 ÷ 540 = 1,223 hours. An industrial water supply delivering 10,000 gallons (37,854 litres) per hour can fill the same pool in 66 hours — roughly 2.75 days. For comparison, a 15,000-gallon (56,781-litre) home pool takes about 27.8 hours to fill with the same garden hose.