This calculator allows you to convert from Inch water (4°C) to Ton-force (long)/square inch and in a reverse direction. To convert from Inch water (4°C) to Ton-force (long)/square inch, enter the amount of Inch water (4°C) into the first input and to convert from Ton-force (long)/square inch to Inch water (4°C), enter the amount of Ton-force (long)/square inch into the second input.