Old School RuneScape · Blast Furnace

OSRS Blast Furnace Calculator: XP, Time and Real Profit

Work out the XP you need, how many bars that is, and how many hours it will actually take — then work out whether the bars are worth more than the ore you fed in. Pick a bar once; both calculators follow it.

01 · xp and time to your goal
XP needed
Bars
Ore cost to get there
 
02 bars

Blast Furnace rates by bar

Experience per bar is fixed by the game. Bars per hour and XP per hour are the wiki's figures, assuming ice gloves or smiths gloves (i) to skip the cooling delay and a coal bag in one inventory slot. Tap a card to switch bar.

03 the alternative

The other way to spend those hours

Every figure above assumes you are at the keyboard for all of it. Blast Furnace is five steps — bank, coal bag, conveyor, dispenser, bank — that never change, several thousand times over, at a pace you have to hold or the rate collapses.

Botting Hub plays the official game client with nothing injected or hooked, driving it with AI vision and simulated input. Below is what the same bar earns, or costs, unattended.

botting profit · per month
  • Profit per bar — what the bar sells for minus what the ore cost you. Bar value on its own is not profit, and treating it as such is why some calculators show millions an hour here
  • Prices — both editable above and refilled when you change bar. Gold defaults to 86 GP a bar against 144 GP of ore, which is a real loss of 58 a bar. Other bars default to zero ore cost, so put yours in
  • Rates — the wiki's bars per hour, assuming ice gloves or smiths gloves (i) and a coal bag
  • Foreman fee — not included; it applies below 60 Smithing
  • Gold rate — editable above, default $0.20 per 1M GP
  • Bond — $2.60 per 14 days of membership, charged pro-rata, so 30 days is $5.57
  • Proxy — $0.50/month per bot
  • Account sale — $25, only once a bot has actually banked the XP for 99 from the level set above
  • Script price — one-off, not counted in monthly costs
Bars per bot, per month
Profit per bar
Gold per bot, per month
Smithing XP per bot
Running cost
 

See the Blast Furnace AI script →

04 method

How the numbers are worked out

Old School RuneScape uses a fixed experience curve — each level needs roughly 10% more XP than the last. That is why level 92 is the halfway point to 99: 6,517,253 XP of the 13,034,431 needed.

Why profit is not bar value. A Blast Furnace calculator that shows a million GP an hour is showing you the value of the bars and quietly ignoring the ore you bought to make them. Profit is bars per hour multiplied by the bar price minus the ore cost, and for several bars that number is negative. Both prices are inputs above so you can use today's Grand Exchange rather than a figure baked in months ago.

Gold is the point, and gold loses money. A gold bar sells for around 86 GP and the ore to make it costs around 144, so every bar is about 58 coins out of pocket — roughly 350,000 GP an hour gone. In exchange you get 342,800 Smithing XP an hour, about five times any other bar. You are buying levels at a known price, and that is a perfectly sensible thing to do as long as nobody pretends otherwise.

Requirements. 40 Smithing for gold, 30 for steel, 85 for runite. Goldsmith gauntlets for the gold rate, ice gloves or smiths gloves (i) so bars need no cooling, and a coal bag for anything that uses coal. Below 60 Smithing the foreman charges a fee, which is not counted above.

05 questions

Frequently asked questions

How much Smithing XP per hour is Blast Furnace?

314,700–370,900 XP an hour on gold bars with goldsmith gauntlets, from 5,600–6,600 bars. Every other bar lands in the 50–68k range, so gold is roughly five times faster than anything else there.

Is Blast Furnace profitable?

On gold, no — a gold bar sells for about 86 GP and the ore costs about 144, so you lose roughly 58 coins a bar and around 350,000 GP an hour. That is the trade everyone makes for the fastest Smithing in the game. Other bars can clear a margin, but only once you subtract the ore, which is the step most calculators skip.

What do I need for Blast Furnace?

40 Smithing for gold bars (30 for steel, 85 for runite). Goldsmith gauntlets for the gold rate, ice gloves or smiths gloves (i) to skip the cooling delay, and a coal bag. Below 60 Smithing you also pay the foreman a fee.

How long does 1–99 Smithing take at Blast Furnace?

About 38 hours on gold bars at 342,800 XP an hour. On steel it is closer to 236. Gold is the only reason this method has the reputation it does.

Do I really need the coal bag?

For any bar that uses coal, yes — it is worth a large slice of the hourly rate. Gold and iron need no coal, so it matters less there, but the script handles it either way.

Which bar should I make?

Gold if you want levels, and it is not close. Mithril for a reasonable rate at a fraction of the ore cost. Steel if you are feeding a cannonball operation — our Smithing AI turns them into about 300,000 GP an hour.

How much XP is 99 Smithing?

13,034,431 XP from level 1. Level 92 is 6,517,253 — the halfway point in XP, not level 50.

Why do the numbers here differ from other calculators?

Because most of them quote the value of the bars produced and call it profit. Bar value minus nothing is not profit — you paid for the ore. Put your real ore cost in above and the figure changes, sometimes from a large gain to a loss.

Skip the 38 hours

The official game client, driven by AI vision with nothing injected. Blast Furnace AI banks, loads the conveyor, works the coal bag and collects from the dispenser on loop — one payment, kept for life.

Get AI Blast Furnace →

Related: OSRS Blast Furnace bot · Smithing bot · Mining bot · Best OSRS bot client 2026 · All AI scripts