Shortcuts for converting units of pressure?

[Andiio]

Are there any shortcuts for converting units of pressure?
(atm, mmHg, kPa)

I know how to do it and all but just wondering how people here on VN do it, and if there are any better ways.

Thanks!

[Martoman]

err just 1atm = 760mmhg = 101.3kPa

If you have 50 mmhg want to convert to kpA

Then I know that i want to *cancel* the mmhg so it must be on the bottom of the denominator of the fraction I want to multiply. I want kpa so that must be on the top

So

mmHg cancels leaving kPa. We can multiply by that fraction because its equivalent to 1.

[crayolé]

Cross multiplying with ratios does wonders in chem

Say you want to convert 610mmHg to atm

Theres
------------------1atm in 760 mmHg
therefore, there is x atm in 610 mmHg

Times the diagonals [610x1] and divide by the one leftover [610x1/760] and you have your answer
Works for pretty much every calculation you'll come across in chem

[Andiio]

Yeahhh I was doing cross multiplying up till now, and know how to do the 'fractional' conversion through physics haha.

Will probably go for the fractional conv. as it is much faster

[Martoman]

Cross multiplying with ratios does wonders in chem

Say you want to convert 610mmHg to atm

Theres
------------------1atm in 760 mmHg
therefore, there is x atm in 610 mmHg

Times the diagonals [610x1] and divide by the one leftover [610x1/760] and you have your answer
Works for pretty much every calculation you'll come across in chem

for example; Convert

It actually does; though an intuitive understanding is far better. What I mean by that is you don't have to rely on formulae to calculate things; it should seem natural. You don't need to know a formula to calculate the amount of petrol that will be pumped into a car if you fill at 5 L / min for 5 mins do you? If you do, please, the door to foundation maths is wide open. 

Similarly, you have 16grams/mol (MOLAR MASS) and you want to know how many grams in 5 mol? I mean you don't need to know the formula to go 16*5!

[Andiio]

Cross multiplying with ratios does wonders in chem

Say you want to convert 610mmHg to atm

Theres
------------------1atm in 760 mmHg
therefore, there is x atm in 610 mmHg

Times the diagonals [610x1] and divide by the one leftover [610x1/760] and you have your answer
Works for pretty much every calculation you'll come across in chem

for example; Convert

It actually does; though an intuitive understanding is far better. What I mean by that is you don't have to rely on formulae to calculate things; it should seem natural. You don't need to know a formula to calculate the amount of petrol that will be pumped into a car if you fill at 5 L / min for 5 mins do you? If you do, please, the door to foundation maths is wide open. 

Similarly, you have 16grams/mol (MOLAR MASS) and you want to know how many grams in 5 mol? I mean you don't need to know the formula to go 16*5!

Yeahhh haha; just sometimes the cross multiplication/intuitive calculation is a tad tedious..

[Martoman]

i don't see how the intuition is tedius.... i usually write out everything as blah*blah*blah/ blah*blah in one step rather than go through the formulas.

[Andiio]

As in, the cross multiplication process