🐉 Tan Leather Calculator

How the Tan Leather Spell Works

Tan Leather is a spell on the Lunar spellbook that requires 78 Magic and completion of the Dream Mentor quest. Each cast consumes 2 astral runes and 5 fire runes (use a fire staff to eliminate fire rune cost) and tans up to 5 hides in your inventory. At approximately 1,000 casts per hour, you can tan about 5,000 hides per hour, making this one of the most profitable Magic training methods.

The profit per hide equals the tanned leather GE price minus the raw hide GE price minus the rune cost per hide (2 astral runes divided by 5 hides = 0.4 astral runes per hide). Dragonhide variants are the most commonly tanned: green, blue, red, and black dragonhide each have different profit margins that change with GE prices. Green dragonhide is the highest volume and easiest to buy in bulk, while black dragonhide typically offers the highest profit per hide.

You can also tan cow hides and snake hides, though these are usually less profitable. The key to maximizing profit is checking current GE prices before committing to a hide type, which is exactly what this calculator does. For more Magic money-makers, see the money making guide, or browse skilling resource prices for current material costs.

Strategy Tips for Leather Tanning

Always use a fire staff or tome of fire to eliminate fire rune costs. The spell requires 5 fire runes per cast, so at 1,000 casts per hour, you save 5,000 fire runes per hour. This significantly improves your profit margin, especially when fire rune prices are elevated. Set up a bank preset with your fire staff, astral runes, and a full inventory of hides for maximum efficiency.

The best hide to tan changes frequently. Green dragonhide has the highest GE volume and is easiest to buy in bulk, while black dragonhide usually offers the best per-hide profit. Check this calculator before each session and compare all four dragonhide types — sometimes blue or red dragonhide offers the best balance of margin and buyability.

Common Mistakes to Avoid

1. Using the wrong spellbook — Tan Leather is on the Lunar spellbook, not the standard spellbook. Make sure to switch at the Astral Altar on Lunar Isle or via your house altar.
2. Forgetting astral rune cost — Each cast uses 2 astral runes. At high volumes, astral rune costs add up. Factor this into your profit calculation or check the calculator above which includes all rune costs.
3. Not using a fire staff — Paying for 5 fire runes per cast when a fire staff provides unlimited fire runes is throwing away profit on every single cast.