Formula Used
The calculator uses the selected recipe to multiply ore needs by planned bars.
Primary material needed = Bars planned × Primary ore per bar.
Secondary material needed = Bars planned × Secondary material per bar.
Gross revenue = Sellable bars × Bar sell price.
Total cost = Primary cost + Secondary cost + Machine fee + Trip cost + Extra cost + Market tax.
Net profit = Gross revenue − Total cost.
Total experience = Bars planned × Experience per bar.
Break even sell price = Non-tax cost ÷ Sellable bars after tax adjustment.
How to Use This Calculator
- Select the bar type you want to smelt.
- Choose target bars or target experience mode.
- Enter your ore prices, coal price, and bar sell price.
- Add machine fees, tax, trip costs, and any extra costs.
- Enter bars per hour to estimate time and hourly profit.
- Use stock fields when checking available supplies.
- Press Calculate to view results above the form.
- Use CSV or PDF buttons to save the result.
Example Data Table
| Bar type |
Primary material |
Secondary material |
XP per bar |
Example target |
Use case |
| Steel bar |
Iron ore × 1 |
Coal × 1 |
17.5 |
2,000 bars |
Balanced starter profit check |
| Mithril bar |
Mithril ore × 1 |
Coal × 2 |
30 |
3,000 bars |
Mid-level supply planning |
| Adamantite bar |
Adamantite ore × 1 |
Coal × 3 |
37.5 |
1,500 bars |
Higher capital margin check |
| Runite bar |
Runite ore × 1 |
Coal × 4 |
50 |
500 bars |
Large investment review |
OSRS Blast Furnace Planning Guide
The Blast Furnace is a focused smithing activity in Old School RuneScape. It can turn ore into bars with lower coal needs than normal furnaces. Good planning matters because profit changes fast. Ore prices, bar prices, stamina use, coffer fees, and selling tax can change the final margin. This calculator helps you compare those moving parts before you start a run.
Why This Calculator Helps
A simple profit check only subtracts ore cost from bar value. Blast Furnace runs need more detail. You may need coal, a machine fee, a trip cost, and extra supplies. You may also lose money when market tax is applied. The tool combines all these inputs, then shows gross value, total cost, net profit, experience, time, trips, and break even selling price.
Choosing a Bar Type
Each bar type uses a recipe. Bronze needs copper and tin. Steel needs iron and coal. Mithril, adamantite, and runite need rising coal amounts. Gold can use a special experience option. Select the bar type first, then enter your own market prices. Default values are only placeholders. They should be replaced with your live Grand Exchange values.
Profit and Experience Balance
The best bar is not always the most profitable bar. Some bars give better experience. Others give safer margins. Gold can offer strong experience when gauntlets are used, but profit may depend heavily on ore price. Higher bars can create better value, but they also require more capital. Use the output to compare money per bar, money per hour, and experience per hour.
Using Targets
You can calculate by a bar target or an experience target. Bar mode is useful for buying supplies. Experience mode is useful when training toward a level goal. The stock checker estimates how many bars your available ore can support. This helps avoid unfinished trips. Always review your inputs before buying supplies. Small price errors can turn a good plan into a loss.
Safer Review
Use the calculator as a planning aid, not a price feed. Recheck prices before trading. Add realistic delays for banking and waiting. Compare several bars side by side. A slower route can still be better when it protects your coin stack well today.
FAQs
What does this calculator estimate?
It estimates Blast Furnace bars, ore needs, coal needs, costs, tax, profit, experience, run time, trips, and break even price from your entered values.
Are the prices updated automatically?
No. Enter your own current prices. This keeps the calculator flexible and avoids relying on stale market values.
Can I calculate by experience target?
Yes. Select experience target mode. Then enter current Smithing XP and target Smithing XP. The calculator estimates required bars.
Why is my result negative?
A negative result means your estimated costs exceed the sell value. Check ore prices, bar price, tax, fees, and extra costs.
What does output loss percent mean?
It reduces sellable bars for conservative planning. Use it for mistakes, incomplete trips, or any expected waste.
How is market tax handled?
The tax percentage is applied to gross revenue. It is included in total cost and affects net profit.
Does the goldsmith option affect every bar?
No. It only changes the experience value when gold bars are selected. Other bar recipes remain unchanged.
Can I save my result?
Yes. Use the CSV button for spreadsheet data. Use the PDF button for a printable result summary.