This calculator allows you to convert from Ton-force (long)/square inch to Millimeter mercury (0°C) and in a reverse direction. To convert from Ton-force (long)/square inch to Millimeter mercury (0°C), enter the amount of Ton-force (long)/square inch into the first input and to convert from Millimeter mercury (0°C) to Ton-force (long)/square inch, enter the amount of Millimeter mercury (0°C) into the second input.