Outside Dimensions
Standard portable toilets will stand at around 91 inches high, give or take an inch, and will usually have an outside width of 44 inches and an outside depth of 48 inches.
Inside Dimensions
The space inside a portable toilet is usually pretty cramped, with the inside width measuring 42 inches and the inside depth measuring 21 inches. The other 26 inches or so of depth are taken up by the toilet and tank.
Weight
A basic portable toilet will weigh around 200 pounds stone-empty. This weight will change depending on how many clients it's serviced recently. Most portable toilets come with a tank that holds between 60 and 75 gallons, depending on the manufacturer.
Handicapped-Accessible Toilets
By their very nature, handicapped-accessible toilets need to be larger than their standard counterparts. Handicapped toilets will typically be around 77 inches deep and wide, and around 90 inches tall. Most of the extra space is given to floor space -- around 60 inches of turning space -- for the handicapped person to turn his wheelchair appropriately. These toilets also weigh an extra hundred or so pounds, usually coming in around 330 pounds in total.