Metric: Liters
Customary: Gallons
In the US 42 gallons is a reasonable estimate. Of course, one does not often fill them full on purpose.
what is the best estimate of the capacity of a soda can
Approximately 54 gallons when it's a foot deep.
The capacity of a bathtub is around 80 litres.
The customary unit of capacity for a bathtub is gallons.
you would use gallons to measure the capacity of a bathtub
The capacity of a bathtub could be appropriately measured in liters.
Only if the bathtub has a capacity of 45 gallons.
Gallons
2 milliliters
1 liter
Liter
8000000000000000000000000 liters