What is an easy way to remember conversions of gr to mg?
The grain clock
The grain clock is thinking of the face of a clock and applying gr to mg like this. 1hr=60min, gr1=60mg, 1/4hr=15min, gr1/4=15mg, 1/2hr=30min, gr1/2=30mg, 3/4hr=45min, gr3/4=45mg
1/4hr=___mins
1/4hr=15mins
1/2hr=___mins
1/2hr=30mins
3/4hr=___mins
3/4hr=45mins
1hr=____mins
1hr=60mins
gr1/4=___mg
gr1/4=15mg
gr1/2=___mg
gr1/2=30mg
gr3/4=___mg
gr3/4=45mg
gr1=____mg
gr1=60mg
gr1/4=___mg
gr1/4=15mg
gr1/2=___mg
gr1/2=30mg
gr3/4=___mg
gr3/4=45mg
gr1=____mg
gr1=60mg
gr1/4=___mg
gr1/4=15mg
gr1/2=___mg
gr1/2=30mg
gr3/4=___mg
gr3/4=45mg
gr1=____mg
gr1=60mg
1/4hr=___mins
1/4hr=15mins
gr1/4=___mg
gr1/4=15mg
gr1/150=___mg
gr1/150=0.4mg
here is still the same numerals, a 1, a 5, and a 4 just reversed on the sides of the equation with zero's added.
1/150hr=____mins
1/150hr=0.4mins
1hr=60mins. 60mins. divided by 150 = 0.4mins
gr1/150=____mg
gr1/150=0.4mg
gr1=60mg. 60mg divided by 150 = 0.4mg
gr1/150=____mg
gr1/150=0.4mg
gr1/150=____mg
gr1/150=0.4mg
gr1/150=____mg
gr1/150=0.4mg
1/2hr=____mins
1/2hr=30mins
gr1/2=____mg
gr1/2=30mg
1/300hr=___mins
1/300hr=0.2mins
gr1/300=___mg
gr1/300=0.2mg
gr1/300=___mg
gr1/300=0.2mg
gr1/300=___mg
gr1/300=0.2mg
gr1/300=___mg
gr1/300=0.2mg
gr1/300=___mg
gr1/300=0.2mg
here is still the same numerals, a 1, a 2, and a 3 just reversed on the sides of the equation and zeros added.
1/300hr=___mins
1/300hr=0.2mins
1hr=60mins. 60mins. divided by 300 = 0.2mins
gr1/300=0.2mg
gr1/300=0.2mg
gr1=60mg. 60mg divided by 300 = 0.2mg
gr1=___mg
gr1=60mg
gr15=____mg
gr15=1000mg
gr15 X 60mg = 900mg but rounds up to be 1000mg or 1g
gr15=____g
gr15=1g
gr15=____g
gr15=1g
gr15=____g
gr15=1g
1g=gr____
1g=gr15
Since a paperclip weighs 1g think of stretching out the paperclip and cutting it into 15 pieces holding the pieces in your hand they may look somewhat like 15 grains of rice.
