Cannonball Calculator
Smithing cannonballs is the classic AFK money-maker - this calculator prices the recipe against the live Grand Exchange in real time, so you can see whether bars-to-balls is currently a profit or a loss, and how many bars stand between you and your Smithing target.
| Recipe |  1× Steel bar→ 4× Cannonballs |
| Level required | 35 Smithing |
| XP per bar | 9,216 (512 base × 18) |
| Profit per inventory | - |
Verified against the server's FurnaceProduct table: one steel bar plus a kept ammo mould makes 4 cannonballs at level 35 for 512 base Smithing XP (×18 = 9,216 in game) on an 8-tick cycle that never fails. Prices are live Grand Exchange - profit assumes buying bars at the high offer and selling balls at the low offer, minus the 2% GE tax.
Frequently asked questions
What level do I need to smith cannonballs?
Level 35 Smithing and an ammo mould. One steel bar makes 4 cannonballs, and the mould is kept between uses.
How much XP do cannonballs give on this server?
Each steel bar grants 512 base Smithing XP, which becomes 9,216 XP after the server's 18× skilling multiplier - one of the fastest AFK Smithing methods here.
Is smithing cannonballs profitable right now?
The calculator prices it live: steel bars are valued at the current high-side buy price and cannonballs at the low-side sell price, minus the 2% Grand Exchange tax. The profit-per-bar figure updates as the market moves.