Gigacalories to tons of coal equivalent conversion calculator shown above calculates how many tons of coal equivalent are in 'X' gigacalories (where 'X' is the number of gigacalories to convert to tons of coal equivalent). In order to convert a value from gigacalories to tons of coal equivalent (from Gcal to TCE) type the number of Gcal to be converted to TCE and then click on the 'convert' button.