[RPG] How much damage does generic, non-magical fire do per round


Say a character was in a burning house, the fire not caused by magical means, and had to pass through a hex of fire. What is the fire damage for this in 5e? What about per round?

Best Answer

There isn't an explicit rule for this -- it is left to the DM to improvise an amount of damage that seems appropriate for the situation.

The DMG (p. 249) gives some guidelines on improvising damage. It suggests that falling into a fire pit might cause 2d10 damage.

In the case of someone running through a small area of fire as per your scenario, I'd look to the create bonfire cantrip from the Elemental Evil supplement:

You create a bonfire on ground that you can see within range. Until the spells ends, the bonfire fills a 5-foot cube. Any creature in the bonfire’s space when you cast the spell must succeed on a Dexterity saving throw or take 1d8 fire damage. A creature must also make the saving throw when it enters the bonfire’s space for the first time on a turn or ends its turn there.

Even though that is magical and not mundane fire, this suggests that a dextrous character could pass through a 5-foot cube of fire without taking damage, or with fairly minimal (1d8) damage if they're clumsy. Think about passing your finger through a candle flame without getting burned. I think I'd probably improvise pretty close to this for small areas of mundane flame. For a larger area, I'd probably do something like 1d10 per round in the flame.