Furnace Calculator
Calculate smelting times, fuel requirements, and optimize your furnace setup
Select Furnace Type
Select Ore Type
Select Fuel Type
Smelting Results
1,000
Metal Ore
→
1,000
metal_fragments
Total Time2m 20s
Wood Needed5
Charcoal Produced+22Ore/Second:7.14
Time Saved:Base speed
Fuel Comparison
| Fuel Type | Burn Time | Stack Size | Total for 1000 Metal Ore | Stacks Needed | Special |
|---|---|---|---|---|---|
| Wood | 30s | 1000 | 5 | 1 | Produces 0.75 charcoal |
| Charcoal | 30s | 1000 | 5 | 1 | - |
 Low Grade Fuel | 120s | 500 | 2 | 1 | - |
 Crude Oil | 120s | 500 | 2 | 1 | - |
 Diesel Fuel | 120s | 500 | 2 | 1 | - |
Pro Tips
Furnace Efficiency
- • Large furnace is 18x more efficient than small
- • Electric furnace smelts 2x faster but needs power
- • Multiple furnaces reduce total time linearly
- • Small furnace processes slots sequentially
Fuel Tips
- • Wood in small furnace produces charcoal while smelting
- • Low grade fuel burns 4x longer than wood/charcoal
- • Large furnace can use wood OR charcoal in any slot
- • Always fill all slots for maximum efficiency
Related Items & Guides
Large Furnace
18x more efficient than small furnace
Electric Furnace
2x speed smelting with electricity
Metal Ore
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Electricity Guide
Power your electric furnaces efficiently
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