'%3e%3cpath%20transform='translate(0.00,0)%20scale(1.41643,-1.41643)'%20d='M188%20291V407H337Q384%20407%20409.5%20431.0Q435%20455%20435%20496Q435%20534%20410.0%20559.0Q385%20584%20338%20584H188V706H356Q426%20706%20479.0%20679.5Q532%20653%20562.0%20606.0Q592%20559%20592%20498Q592%20436%20562.0%20389.5Q532%20343%20478.0%20317.0Q424%20291%20351%20291ZM68%200V706H225V0ZM452%200%20232%20304%20376%20343%20638%200Z'/%3e%3cpath%20transform='translate(1023.51,0)%20scale(1.41643,-1.41643)'%20d='M352%20-11Q265%20-11%20198.5%2026.0Q132%2063%2094.5%20128.5Q57%20194%2057%20278V706H215V269Q215%20227%20233.0%20196.0Q251%20165%20282.5%20148.5Q314%20132%20352%20132Q392%20132%20422.0%20148.5Q452%20165%20469.5%20195.5Q487%20226%20487%20268V706H645V277Q645%20193%20608.0%20128.0Q571%2063%20505.0%2026.0Q439%20-11%20352%20-11Z'/%3e%3cpath%20transform='translate(2117.85,0)%20scale(1.41643,-1.41643)'%20d='M280%20-11Q193%20-11%20130.5%2017.5Q68%2046%2016%20104L118%20205Q152%20166%20193.5%20144.5Q235%20123%20290%20123Q340%20123%20367.5%20141.0Q395%20159%20395%20191Q395%20220%20377.0%20238.0Q359%20256%20329.5%20269.0Q300%20282%20264.5%20294.0Q229%20306%20194.0%20321.5Q159%20337%20129.5%20360.5Q100%20384%2082.0%20419.5Q64%20455%2064%20509Q64%20574%2095.5%20621.0Q127%20668%20183.0%20692.5Q239%20717%20312%20717Q386%20717%20447.5%20691.0Q509%20665%20549%20620L447%20519Q415%20552%20382.5%20568.0Q350%20584%20309%20584Q268%20584%20244.0%20568.5Q220%20553%20220%20524Q220%20497%20238.0%20480.5Q256%20464%20285.5%20452.0Q315%20440%20350.5%20428.0Q386%20416%20421.0%20400.0Q456%20384%20485.5%20359.5Q515%20335%20533.0%20297.5Q551%20260%20551%20205Q551%20104%20479.0%2046.5Q407%20-11%20280%20-11Z'/%3e%3cpath%20transform='translate(3043.63,0)%20scale(1.41643,-1.41643)'%20d='M241%200V696H398V0ZM20%20569V706H619V569Z'/%3e%3cpath%20transform='translate(4048.73,0)%20scale(1.41643,-1.41643)'%20d='M68%200V706H225V0ZM188%200V136H575V0ZM188%20295V426H540V295ZM188%20571V706H570V571Z'/%3e%3cpath%20transform='translate(5019.83,0)%20scale(1.41643,-1.41643)'%20d='M516%200%20319%20315H300L28%20706H215L409%20410H428L700%200ZM15%200%20276%20378%20397%20310%20194%200ZM434%20333%20313%20401%20509%20706H688Z'/%3e%3c/g%3e%3cpath%20fill='%23FFFFFF'%20transform='translate(6132.58,0)'%20d='M%20370.0%200%20L%20740.0%201000.0%20L%20450.0%201000.0%20L%20370.0%20620.0%20L%20290.0%201000.0%20L%200%201000.0%20Z'/%3e%3c/svg%3e)
Smelting Calculator
Tell Rustexa what ore you have and how many slots you are using. It works out what comes out, how long it takes, and exactly how to fill the furnace to finish soonest.
Which furnace
What are you smelting?
Cheap, everywhere. Burns wood and gives charcoal back.
1.7s each → 1 Sulfur
3.3s each → 1 Metal Fragments
6.7s each → 1 High Quality Metal
Furnace cannot process this
10s each → 15 Metal Fragments
10s each → 10 Metal Fragments
0.7s each → 1 Jar of Honey
How many slots are you using?
You choose this — Rustexa will not pretend to know how many slots your furnace has. Each slot holds one type of ore.
Your smelt
Nothing in the furnace
Add some ore and Rustexa will time the whole smelt instantly.
Data & sources
What Rustexa will not tell you
- How much wood a furnace burns per second, and therefore the exact wood cost of a smelt.
- How much charcoal you get back per wood burned.
- How many slots each furnace has — you tell Rustexa how many you are using.
Nobody publishes those numbers anywhere Rustexa can check, so it leaves them blank rather than inventing them.