Last updated:
2018-07-20, 09:43 AM
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The changelog contains more information about recently added features and fixes/tweaks!
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Fuel list changelog! - See what's different in this version!
The fuel lists are now on Github! Feel free to submit pull requests to add fuels or correct errors!
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So, this site is incredibly old now. It was first created in 2013, and has changed quite a bit since then.

While it works fine for the most part, I hate it a lot. It's very outdated.
As a developer I've learned a lot of things since I made it. And I would not make it like this now.

So, I want to ask, would you like a more modern version of the old faithful Boiler Calculator?
This version will continue to be available, but I'd like to also provide a better, more modern version.

Please fill out this survey to help me decide!
To prevent people submitting it multiple times sign-in is required.
Railcraft Boiler Calculator
Fuel Simulation Mode lets you input a specific amount of fuel and see how long the boiler will run. In this mode each phase can be disabled by unticking the respective checkbox. Fuel is input in either of the two boxes. The first represents stacks, and the second single items. Both accept decimals, so you can for example enter 0.5 in the first box to get half a stack (32) of your selected fuel, or enter 0.5 in the second box to run on half an item.
Fuel Simulation Mode
Show All | Solid only | Fluids only
Show Heating Process (Warning! May make the page take longer to render!)
Display Times in Ticks (Shows times in ticks instead of hours etc)
Round Energy Average - Select if you want energy average rounded to two decimals.
Fuel Per Steam Multiplier - This is a railcraft config option.
Boiler Type
Number of Tanks (Size) - Going for more than you need wasted fuel.
Starting Heat Level - Setting this to max (500 or 1000) skips the heatup in any mode.
Energy Production Report - Displays production in selected units. Unavailable in heatup mode.
Fuel: (State) Name (Max Stack size)(Heat Value)
Custom Fuel Value - Allows specifying a custom fuel value. Overrides selected fuel in Fuel menu.
x (stacksize) + Fuel Amount - (S)Items or (L)Buckets, not mB
Heatup Phase | Run Phase | Cooldown Phase
Include heatup phase in average Include cooldown phase in average
Results from Fuel Simulation Mode:
Heat-up phase:
- Heating up took 4 hours, 34 minutes & 14 seconds
- Used 54.88% of given fuel
- Used 13172.22k heat units (274.42 items/buckets)
Run phase:
- Ran for 3 hours, 37 minutes & 57 seconds before running out of fuel
- Used 45.12% of given fuel
- Used 10827.78k heat units (225.58 items/buckets)
Cooldown phase:
- Cooled down in 4 hours, 25 minutes & 36 seconds
Ran for a total of 8 hours, 12 minutes & 11 seconds (Heatup Phase + Run Phase)
Used a total of 500 items/buckets.

Energy Report:
Heatup: 145919.42 Buckets
Run: 188309.236 Buckets
Cooldown: 90781.8 Buckets
Total: 188309.236 Buckets
Average/t: 0.72 Buckets/t
This calculator will tell you how much fuel of a certain type is needed to heat up a cold boiler to it's maximum temperature (Heatup Only), or tell you how long it will run with the given fuel (Fuel Simulation) or finally tell you how much fuel is required to keep the boiler running a set time (Time Simulation).
A few noteworthy things:
This calculator was written by Forecaster for the Minecraft mod Railcraft by CovertJaguar, based on formulas provided by the author.
The formula for calculating fuel usage can be found on the Railcraft Wiki.
Times are directly converted from ticks, this unless your server/client always run at peak tickrate (unlikely) times will vary slightly.
Fules values are kept up to date with the latest public Railcraft release. (Fuels from other mods are kept up to date as best I can.)
If you have a question, an issue or a feature suggestion (such as a specific fuel) you can post a comment and I will reply!