This calculator allows you to convert from Millimeter/second to Velocity of sound in sea water (20°C, 10 meter deep) and in a reverse direction. To convert from Millimeter/second to Velocity of sound in sea water (20°C, 10 meter deep), enter the amount of Millimeter/second into the first input and to convert from Velocity of sound in sea water (20°C, 10 meter deep) to Millimeter/second, enter the amount of Velocity of sound in sea water (20°C, 10 meter deep) into the second input.