On the list you provided with the question, there isn't a single unit appropriate
for measuring the volume of a swimming pool or any other container.
Swimming Pools are typically measured in yards or meters. Competitions are usually held in 25 yard, 25 meter, or 50 meter pools.
Meters.
You would use meters.
You would use cubic meters or cubic feet to measure the volume of a swimming pool. This unit accounts for the three-dimensional space that the pool occupies.
Litres.
Liters or cubic meters are typically used to measure the volume of water in a swimming pool.
The most appropriate unit to measure the volume of water in a swimming pool is cubic meters (m³) or cubic feet (ft³). This unit accounts for the three-dimensional space occupied by the water in the pool. It is important to use cubic units to accurately measure the total amount of water present in the pool.
You would use meters.
You would be more likely to measure a fish tank in centimeters because it is typically smaller and requires more precise measurements. A swimming pool, on the other hand, is usually larger and would be measured in meters or feet.
It depends where you are. The term I find most common is Gallons.
The unit commonly used to measure the amount of water in a pool is cubic meters (m^3) or cubic feet (ft^3), depending on the country's standard measurement system. This unit accounts for the volume of water in the pool, which is crucial for maintaining proper chemical balance and ensuring safe swimming conditions. To calculate the volume of water in a pool, you would typically multiply the length, width, and depth of the pool in the same units (e.g., meters or feet).
The base unit of volume is the cubic metre.
I would use meters to measure the length and width of the pool as it is a more appropriate unit for smaller measurements like those typically found in swimming pools. However, if the pool is very large, kilometers may be more appropriate.