Grow Your Own Magazine

View our latest subscriptions offers here!


+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 8 of 10
  1. #1
    jojo2910 is offline Rooter
    Join Date
    Aug 2009
    Location
    Farmborough, Bath
    Posts
    462

    Default Converting Compost Litres to Weight

    This may be an impossible question, but if anyone will know the answer grapes will. Its also a bit like a maths question.

    My neighbour sells compost by the tonne and he sells it for 1.40 per 80L bag. How many bags would you get for a tonne?

    Much appreciated.

  2. #2
    Two_Sheds's Avatar
    Two_Sheds is offline Compost Everything...
    Join Date
    Jan 2007
    Location
    windy east coast, sandy soil
    Posts
    30,591

    Default

    Are you filling raised beds or something? And what kind of compost is it?

    All gardeners know better than other gardeners." -- Chinese Proverb.

  3. #3
    Aberdeenplotter is offline Mature Fruiter
    Join Date
    Jan 2009
    Posts
    7,595

    Default

    Litres are a measure of volume (like pints), whereas tonnes are a measure of mass, also often wrongly referred to as weight. So it depends on the density of the substance. If it is water it is easy - 1 litre = 1 kg, so 1000 litres = 1000kg = 1 tonne. A tonne is 1000kg. If you know the density of your substance relative to water you can convert from there. For example if density is 1/2 that of water 1000 litres = 500kg = 0.5 tonnes.

  4. #4
    Aberdeenplotter is offline Mature Fruiter
    Join Date
    Jan 2009
    Posts
    7,595

    Default

    I should maybe confess to having lifted that off a website

  5. #5
    jojo2910 is offline Rooter
    Join Date
    Aug 2009
    Location
    Farmborough, Bath
    Posts
    462

    Default

    Quote Originally Posted by Two_Sheds View Post
    Are you filling raised beds or something? And what kind of compost is it?
    No I am trying to work out if it is cheaper for me and my family to buy a tonne of compost for this year rather than buy the MPC which is on offer. I want to know how many bags we would get from a tonne and how much it would cost. If, for example, its 100 bags then that will be too much, but if it worked out to be 20 bags then it could be better value. I didn't want to get my neighbours hopes up without trying to work it out first.

    It is MPC.

    Aberdeen plotter if you hadn't said then I would have given you all the credit. Maybe the answer is to weigh a litre of MPC and see what that gives me.

  6. #6
    zazen999 is offline Funky Cold Ribena
    Join Date
    Jun 2007
    Location
    Coventry
    Posts
    20,663

    Default

    That is exactly the answer - but it depends also on how wet your tonne will be...the more water the heavier the load for the volume and thus the less volume you will get.

    How much does he charge per tonne?


  7. #7
    Aberdeenplotter is offline Mature Fruiter
    Join Date
    Jan 2009
    Posts
    7,595

    Default

    Quote Originally Posted by jojo2910 View Post
    Aberdeen plotter if you hadn't said then I would have given you all the credit. Maybe the answer is to weigh a litre of MPC and see what that gives me.
    But then I couldn't have lived with the knowledge that I had plageurised some poor souls work.

    Don't know if this helps but I make up my compost for growing exhibition potatoes and then store it in tonne builders bags until I do the planting. Each builders bag filled to the top holds 35 x 17 ltre bags of compost. That is a few litres short of 600ltres or 7.5 x 80 ltre bags.

    That comparison is by volume and not by weight so a weight comparison would be useful.

    Remember you may have difficulty transporting compost in bulk whereas you can easily move a few 80 ltre bags.

  8. #8
    rana's Avatar
    rana is offline Tuber
    Join Date
    Jul 2008
    Location
    Dorset
    Posts
    931

    Default

    How ever many bags make up a ton(ne), 1.40 for 80L of MPC is a real bargain.
    Also remember that commercial MPC bags state the volume 'when packed'. Both the volume and the weight change with storage and the state of hydration.

Similar Threads

  1. Plan For Converting A Shed?
    By broadway in forum Rule the Roost
    Replies: 6
    Last Post: 04-06-2010, 03:03 PM
  2. Ex bat seems to be under weight
    By tlck9 in forum Rule the Roost
    Replies: 11
    Last Post: 15-04-2010, 02:36 PM
  3. Advise on shed converting, please.
    By lettucegrow! in forum Rule the Roost
    Replies: 8
    Last Post: 16-02-2010, 06:01 PM
  4. converting a bokashi into a wormery
    By hawthorns in forum Digging Around
    Replies: 1
    Last Post: 24-11-2008, 01:04 PM
  5. converting a paddock for veg production
    By dieselthedemon in forum Allotment Advice
    Replies: 2
    Last Post: 27-08-2008, 01:09 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Organic catalogue