Multiply the number of tons per year by 1,016,047 (which is the number of grams per ton) to convert to grams per year. For example, if you start with 3 tons per year, multiply 3 by 1,016,047 to get 3,048,141 grams per year.
Divide the number of grams per year by 31,536,000 (the number of seconds per year) to convert to grams per second. In this example, divide 3,048,141 by 31,536,000 to get 0.096655917 grams per second.
Multiply the number of tons per year by 0.032218639 (the number of grams per second in each ton per year) to convert straight to grams per second. In this example, multiply 3 tons per year by 0.032218639 to get 0.096655917 grams per second.