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