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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 If prices appear to be outdated, purge the page by clicking here.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 75.67 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 (502) of buying Supercompost.
Item Cost Potion cost Total cost Net profit (or loss)
if sold on GE
Fever grass 382 75.67 457.67 44.33
Primweed 287 75.67 362.67 139.33
Stinkbloom 332 75.67 407.67 94.33
Tansymum 120 75.67 195.67 306.33
Lavender 298 75.67 373.67 128.33
Curry leaf 900 75.67 975.67 -473.67
Seaweed 15 75.67 90.67 411.33
Banana 237 75.67 312.67 189.33
Orange 942 75.67 1,017.67 -515.67
Lime 760 75.67 835.67 -333.67
Lemon 608 75.67 683.67 -181.67
Cooking apple 737 75.67 812.67 -310.67
Cabbage 494 75.67 569.67 -67.67
Raw potato 622 75.67 697.67 -195.67
Onion 444 75.67 519.67 -17.67
Wheat 76 75.67 151.67 350.33
Grimy guam 342 75.67 417.67 84.33
Clean guam 320 75.67 395.67 106.33
Grimy tarromin 27 75.67 102.67 399.33
Clean tarromin 39 75.67 114.67 387.33
Grimy harralander 54 75.67 129.67 372.33
Clean harralander 100 75.67 175.67 326.33
Grimy marrentill 361 75.67 436.67 65.33
Clean marrentill 364 75.67 439.67 62.33
Grimy ranarr 1543 75.67 1,618.67 -1,116.67
Clean ranarr 1666 75.67 1,741.67 -1,239.67
Magic roots 4181 4,181 -3,679
Maple roots 263 263 239
Oak roots 322 322 180
Willow roots 291 291 211
Yew roots 1053 1,053 -551
Calquat fruit 296 296 206
Coconut shell 53 53 449
Jangerberries 421 421 81
Bittercap mushroom 9202 9,202 -8,700
Papaya fruit 3325 3,325 -2,823
Pineapple 355 355 147
Poison ivy berries 1634 1,634 -1,132
Watermelon 343 343 159
White berries 1058 1,058 -556
Grimy avantoe 687 687 -185
Clean avantoe 849 849 -347
Grimy cadantine 2393 2,393 -1,891
Clean cadantine 2524 2,524 -2,022
Grimy dwarf weed 2691 2,691 -2,189
Clean dwarf weed 2937 2,937 -2,435
Grimy kwuarm 5101 5,101 -4,599
Clean kwuarm 5242 5,242 -4,740
Grimy lantadyme 3403 3,403 -2,901
Clean lantadyme 3570 3,570 -3,068
Grimy snapdragon 863 863 -361
Clean snapdragon 1009 1,009 -507
Grimy torstol 2956 2,956 -2,454
Clean torstol 3106 3,106 -2,604
Grimy toadflax 4046 4,046 -3,544
Clean toadflax 4174 4,174 -3,672