"one ton", "quarter ton" etc don't really mean anything about the load it will carry. It's more a category than a load spec.
Originally it referred to the amount of hay (small bales) you could stack on a flat bed. A quarter ton truck was built to carry 12-16 bales, a one-ton was rated to carry 48-60. In the 30s that was a big load, requiring big wheels, heavy duty running gear, and a powerful engine. So now the biggest, most powerful light truck is a one-ton. But a one-ton truck can easily carry 4 tons, and tow 6 or more.