You have only specified two dimensions. You need a third dimension to calculate volume, along with shape.
83.12 gallons
a gallon is 231 cubic inches, so: 36x16x6.5 / 231 = 16.2 gallons
The container has a volume of 4160 cubic inches (26x16x10). Assuming you are talking about gallons of water, it will hold 18 gallons (231 cu in per gallon).
4 gallons
16 US gallons = 60 liters 16 UK gallons = 72 liters
Depends on liquid's molecular weight.
83.12 gallons
16 gallons (gal) [US liquid] = 60.56658854 liters (L)
= 93.09 gallons (US) = 77.51 gallons (imperial)
16 cubic feet is 119.69 gallons.
1436 US gallons, approx.
You can fill 16 and have 13 gallons left over to partially fill container number 17.
a gallon is 231 cubic inches, so: 36x16x6.5 / 231 = 16.2 gallons
If the dimensions given are in inches then:36 in x 16 in x 16 in = 9216 in39216 in3 = 39.90 US liquid gallons9216 in3 = 34.29 US solid gallons9216 in3 = 33.22 UK gallons
Assuming the height is 16 inches, the volume is 10.67 gallons (US) approx.
18" x 18" x 16" = 5,184 cubic inches = 22.442 gallons (rounded) 1 gallon = 231 cubic inches
2 gal 1 gallon = 8 pints 1 pint = 0.12 gallon