67gp
67gp
0gp
-1gp
—
—
Price history
1 points · hover for detail
Volume · units traded
- 30D low
- 67
- 30D high
- 67
- Volatility
- 0.0%
Flip calculator
Includes the 2% Grand Exchange tax
-1gp
-1 per item · -1.49% ROI
Tax puts break-even at 68 gp.
- Capital required
- 67 gp
- Gross revenue
- 67 gp
- GE tax (2%, 1/item)
- − 1 gp
- Break-even sell
- 68 gp
Item data
- High alchemy
- 1 gp98.5% below market
- Low alchemy
- 1 gp
- Shop value
- 2 gp
- Weight
- 0.2 kg
- Skill / type
- Farming
- Stack / note
- Not stackable · noteable
- Released
- Sep 7, 2017
About Giant seaweed
The Giant seaweed is a members-only item in Old School RuneScape.
"Seaweed of large size"
Over the last 30 days it traded between 66 and 90 gp on the Grand Exchange, averaging 72 gp. About 245,131 units changed hands per day. The price is down 5.6% across that window. The Grand Exchange buy limit is 11,000 every 4 hours. Selling one at the average price costs 1 gp in Grand Exchange tax.
Casting High Level Alchemy returns 1 gp, which is 98.6% below the 30-day average price, so alching a bought one loses money.
How to get Giant seaweed
7 monsters drop Giant seaweed, most commonly Seaweed (Farming) (Always), Narwhal (6/60) and Lobstrosity (8/118).
Dropped by
| Monster | Rarity | Quantity |
|---|---|---|
| Seaweed (Farming) | Always | 1 |
| Narwhal | 6/60 | 1 (noted) |
| Lobstrosity | 8/118 | 6 (noted) |
| Mogre (sea) | 4/128 | 1 |
| Large salvage | 50/2,218 | 1 |
| Veiled kraken | 5/272 | 1 |
| Hermit crab | 2/128 | 1 |
Recipes
Where this item appears in crafting and processing.
Used to make
- 29× Molten glass from 18× Bucket of sand, 3× Giant seaweed, 2× Astral rune, 6× Fire rune, 10× Air rune
- 6× Soda ash from 1× Giant seaweed
Giant seaweed price history
Daily averages rolled up per month, newest first.
| Month | Average | Low | High | Volume |
|---|---|---|---|---|
| October 202612d | 70 | 67 | 77 | 3,104,445 |
| September 2026 | 74 | 66 | 90 | 6,854,597 |
| August 2026 | 69 | 61 | 81 | 8,813,767 |
| July 2026 | 124 | 72 | 164 | 10,985,599 |
| June 202621d | 132 | 114 | 145 | 5,171,607 |
| May 20262d | 144 | 142 | 146 | 412,597 |
| April 20261d | 140 | 140 | 140 | 157,267 |
| March 2026 | 153 | 122 | 193 | 2,503,507 |
| February 2026 | 196 | 143 | 219 | 359,073 |
| January 2026 | 241 | 221 | 282 | 17,850 |
Across 10 months of recorded prices Giant seaweed ranged from 61 gp in August 2026 to 282 gp in January 2026, measured over 218 trading days.
The 30-day average of 72 gp sits in the lower third of that range.
All prices in gp. Volume counts units traded across both sides of the Grand Exchange.
