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Clockwork
This is a static calculator.
It does not take user inputs, but it does use changing prices from the Grand Exchange Market Watch. If prices appear to be outdated, purge the page by clicking here.

This calculator calculates the cost per bucket load for making supercompost. It assumes that the buckets are recycled. It includes methods using compost potion (currently figuring 71.67 coins per bucket, allowing for the sale of the empty vial), but not special purchases or growing from seed etc., as these represent opportunity costs of selling the component on the GE, as well as the work involved.

Excluded also are non-tradeable item like White tree fruit and Peach, and the Compost mound's special move (although this could be added).


Cost of using peaches for supercompost with bones to peaches spell tablets: the find the cost of using peaches for supercompost multipy 27, (the amount of inventory spaces), by the cost of bones (currently 61 coins). Add the cost of a bones to peaches tablet to this (currently 661 coins), and divide the total by 27. The current cost of using this method for supercompost is: 85 coins per peach.


Notes:

  1. Weeds are often to be found lying around allotments (although a good gardener will grow very few of their own) and weeds fill the compost box faster.
  2. While you can't make compost with noted items, you can take sacks of cabbages for example making them very convenient as well as cheap (unlike baskets of strawberries which are merely convenient).
  3. Items listed on the grand Exchange are sometimes "bought out" this is particularly the case with compost potions.
  4. Compare these with the current cost (682) of buying Supercompost.
Item Cost Potion cost Total cost Net profit (or loss)
if sold on GE
Fever grass 373 71.67 444.67 237.33
Primweed 294 71.67 365.67 316.33
Stinkbloom 343 71.67 414.67 267.33
Tansymum 116 71.67 187.67 494.33
Lavender 288 71.67 359.67 322.33
Curry leaf 648 71.67 719.67 -37.67
Seaweed 13 71.67 84.67 597.33
Banana 358 71.67 429.67 252.33
Orange 1039 71.67 1,110.67 -428.67
Lime 734 71.67 805.67 -123.67
Lemon 823 71.67 894.67 -212.67
Cooking apple 644 71.67 715.67 -33.67
Cabbage 474 71.67 545.67 136.33
Raw potato 813 71.67 884.67 -202.67
Onion 183 71.67 254.67 427.33
Wheat 114 71.67 185.67 496.33
Grimy guam 292 71.67 363.67 318.33
Clean guam 259 71.67 330.67 351.33
Grimy tarromin 24 71.67 95.67 586.33
Clean tarromin 29 71.67 100.67 581.33
Grimy harralander 82 71.67 153.67 528.33
Clean harralander 112 71.67 183.67 498.33
Grimy marrentill 221 71.67 292.67 389.33
Clean marrentill 214 71.67 285.67 396.33
Grimy ranarr 2056 71.67 2,127.67 -1,445.67
Clean ranarr 2137 71.67 2,208.67 -1,526.67
Magic roots 4334 4,334 -3,652
Maple roots 262 262 420
Oak roots 316 316 366
Willow roots 248 248 434
Yew roots 1323 1,323 -641
Calquat fruit 200 200 482
Coconut shell 50 50 632
Jangerberries 359 359 323
Bittercap mushroom 9770 9,770 -9,088
Papaya fruit 3755 3,755 -3,073
Pineapple 303 303 379
Poison ivy berries 2098 2,098 -1,416
Watermelon 129 129 553
White berries 1078 1,078 -396
Grimy avantoe 975 975 -293
Clean avantoe 1070 1,070 -388
Grimy cadantine 2618 2,618 -1,936
Clean cadantine 2766 2,766 -2,084
Grimy dwarf weed 2008 2,008 -1,326
Clean dwarf weed 2107 2,107 -1,425
Grimy kwuarm 4588 4,588 -3,906
Clean kwuarm 4660 4,660 -3,978
Grimy lantadyme 2544 2,544 -1,862
Clean lantadyme 2688 2,688 -2,006
Grimy snapdragon 1012 1,012 -330
Clean snapdragon 1096 1,096 -414
Grimy torstol 3144 3,144 -2,462
Clean torstol 3268 3,268 -2,586
Grimy toadflax 4662 4,662 -3,980
Clean toadflax 4872 4,872 -4,190