Coal Burn Calculator

How much Coal does every member need stockpiled to survive the Week-4 -70 °C blizzard with the High-Heat Furnace in Overdrive for the full 3-hour window?

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Coal burn doesn't apply this season

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Switch the warzone selector above to a warzone running Season 2 Polar Storm, or use the change link to override the season for planning.

Single member

Enter your High-Heat Furnace level and current coal.

Furnace level

1 – 30

Coal in stock

Your current stockpile

Blizzard duration (hours)

Default 3 (Week 1-4+)

Blizzard drop (°C)

W1-2: -30 · W3: -50 · W4+: -70

Overdrive (4× burn) Recommended for -70 °C

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Furnace level: —
Burn rate: — coal / min ± estimate
Coal needed: — coal
You have: — coal
Delta: — coal

Per-level burn rate L2–L29 is not yet KB-verified.

Batch (R5 mode)

Paste your alliance roster CSV.