You can reproduce this by querying "1 tonne"
There are 3 types of ton. Given the spelling, it should be assumed that the metric tonne is the one to display (though the widget could also show that there are 2 other kinds of ton if it wanted to be thorough)
1 tonne = 1000kg
1 (long) ton = 1,016kg
1 (short) ton = 907.2kg
