How to work out how many litres of soil in my pot?

[reddevil6]

I couldnt find my answer on google so i thourt ill come here.

I would like to find out how many liters of soil my pot holds, Its a round pot 50cm wide and 45cm deep the soil is only up to 30cm tho so how much soil would this be? at the 30cm mark not 45.

 

also how did you work it out?

[Budgiekk]

(pie r 2) multiply by the height ....30cm

 

but i also guess its not symetrical?? equal width!

[reddevil6]

sorry (pie r 2)?

um na its round and 50cm what ever way i measure it

[bufo marinus]

At the risk of sounding like an old fart, you lot were supposed to learn this shit at school for fuck sake

 

area = pi(3.14) x radius squared OR if the pot is square area = length x width

area x height = cubic volume

1000 cubic centimeters = 1 litre of water

 

There, you have the information, I'm not working doing the sums for you as well, get off your arse and work it out yourself. You's can thank me by ensuring any children your responsible for in life don't turn out the same

[BaronS]

round pot, 50cm (diameter, 25cm R) and maybe a bit tapered, call it straight.

 

3.14159*25^2*30=58904.8125cm^3

 

litre? 10*10*10cm? 1000cm^3

 

58 litres?

 

If you wanted to account for the taper you could use the average R for the depth, which is also the R at half depth if it has straight sides.

 

EDIT: Sorry Bufo, did the sums while you were typing. Yep, should have left it alone :-)

Edited October 31, 2009 by BaronS

[brick]

Or you could look at the bottom of the pot, sometimes they have the volume stamped on the bottom. 250mill = 8.1 ltrs

 

And I agree with you buffo. Schooling is not quite the same anymore.

[bufo marinus]

hehe it's all good, just having a bit of fun

[Budgiekk]

sorry (pie r 2)?

um na its round and 50cm what ever way i measure it

 

 

 

pie r 2 is the area of a circle your 50 cm right?

50 X 30 = 4710

 

 

4.71 litres

basic geometry!

[BaronS]

what's an order of magnitude?

I _spit_ on decimal places.

 

:-)

[louise]

An order of magnitude is a scale used to make rough comparisons.

 

Another way of determining the volume of a pot (without math) is to line the pot with a plastic bag and then fill pot with water from a measuring jug.