Mass Flow Units

A mass flow is the ratio of the mass of a substance passing through a unit area of the cross section of the flow per unit time.

International System of Units (SI)

Since in the international system of SI units the mass is measured in kilograms [kg] and time in seconds [s], respectively, the mass flow is measured in kg/s.
  In metrological measurements, derivatives from these units are also used:

• 1 tonne per second [t/s] = 1000 kg per second [kg/s]
• 1 tonne per minute [t/min] = 1.666666 kg per second [kg/s]
• 1 tonne per hour [t/h] = 0.27777777 kg per second [kg/s]
• 1 tonne per day [t/d] = 0.01157407407 kg per second [kg/s]
• 1 tonne per year [t/yr] = 0.00003168809 kg per second [kg/s]
• 1 kilogram per minute [kg/min] = 0.01666666 kg per second [kg/s]
• 1 kilogram per hour [kg/h] = 0.00027777777 kg per second [kg/s]
• 1 kilogram per day [kg/d] = 0.0000115740740 kg per second [kg/s]
• 1 kilogram per year [kg/yr] = 0.00000003168809 kg per second [kg/s]
• 1 gram per second [g/s] = 0.01 kg per second [kg/s]
• 1 gram per minute [g/min] = 0.00001666666 kg per second [kg/s]
• 1 gram per hour [g/h] = 0.00000027777777 kg per second [kg/s]
• 1 gram per day [g/d] = 0.00000001157407407 kg per second [kg/s]
• 1 gram per year [g/yr] = 0.00000000003168809 kg per second [kg/s]

United States and Britain

In view of the fact that in some English-speaking countries as a measure of weight used different from the kilogram unit, we bring them to 1 kilogram, to derive the ratio:

• 1 ounce [oz] = 0.028349523125 kg (exactly)
• 1 pound [lb] = 16 oz = 0.45359237 kg (exactly)
• 1 American ton (short) = 907.18474 kg
• 1 British ton (long) = 1016.0469088 kg

And then we calculate:

• 1 US ton per second [t/s] = 907.18474 kilograms per second [kg/s]
• 1 US ton per minute [t/min] = 15.11974566666 kg per second [kg/s]
• 1 US ton per hour [t/h] = 0.25199576111 kg per second [kg/s]
• 1 US ton per day [t/d] = 0.01049982338 kg per second [kg/s]
• 1 US ton per year [t/yr] = 0.00002874695 kg per second [kg/s]
• 1 pound per second [lb/s] = 0.45359237 kg per second [kg/s]
• 1 pound per minute [lb/min] = 0.00755987283 kg per second [kg/s]
• 1 pound per hour [lb/h] = 0.00012599788 kg per second [kg/s]
• 1 pound per day [lb/d] = 0.00000524991 kg per second [kg/s]
• 1 pound per year [lb/yr] = 0.00000001437 kg per second [kg/s]
• 1 ounce per second [oz/s] = 0.028349523125 kilograms per second [kg/s]
• 1 ounce per minute [oz/min] = 0.00047249205 kilograms per second [kg/s]
• 1 ounce per hour [oz/h] = 0.00000787487 kg per second [kg/s]
• 1 ounce per day [oz/d] = 0.00000032812 kg per second [kg/s]
• 1 ounce per year [oz/yr] = 0.0000000009 kilograms per second [kg/s]

Britain

• 1 British ton per second [t/s] = 1016.0469088 kg per second [kg/s]
• 1 British ton per minute [t/min] = 16.93411514667 kg per second [kg/s]
• 1 British ton per hour [t/h] = 0.28223525244 kilograms per second [kg/s]
• 1 British ton per day [t/d] = 0.01175980219 kg per second [kg/s]
• 1 British ton per year [t/yr] = 0.00003219658 kg per second [kg/s]