# Regeneration rate

*Dungeon Crawl Stone Soup*

**Version 0.30**: This article is up to date for the latest stable release of*.*

Your **regeneration rate** is the speed at which your character recovers HP. It is affected by many things, almost all of which stack.

### Base regeneration

Your base regeneration rate (BRR) is calculated as follows:

`20 + MHP / 6`

So for every 1 max HP, BRR increases by 1/6.

### Modifiers

Total regeneration rate (TRR) is modified as follows, in this order:

- The Regen+ property adds 80 per instance, which stacks with no limit.
- An artefact may generate with Regen+.
- An Amulet of regeneration gives a rank of Regen+.
- A troll leather armour has Regen+.
- The moon troll leather armour unrandart adds another rank of the property (Regen++ in total).

- The regeneration mutation adds a rank of Regen+ per level.
- The robe of Vines gives Regen++++.

- The demonspawn mutation Powered by Death has a chance to add a temporary regen bonus of up to 100*level. Further kills can increase this up to a maximum of 1000-1200, but falls by 100 every 2-5 turns.
- If you are a vampire and Alive, add 20.
- If you are sick or have -Regen (with monsters in LOS), set your rate to 0.
- Jiyva adds anywhere between 80 and 160, depending on piety level.
- Trog's Hand adds 100.

Because the last two effects are applied last, they are not modified by any other factors, and can heal you even if you have -Regen.

Every turn (10 auts) you accumulate regeneration points equal to your TRR. When you accumulate 100 points, you heal 1 HP, and excess regeneration points are carried over to the next turn. If your action lasted longer/shorter than 10 aut, then the regeneration is scaled with time taken.

At 100 MHP, your BRR is 36.6. In order to get 50 BRR (regain 1 HP every 2 turns), you would need 180 MHP; for 100 BRR (heal every turn), you would need 480 MHP. Items or mutations that increase regeneration are far more efficient at raising your regeneration rate than stacking HP.

### Examples

- You have 30 MHP. Your BRR is 20 + 30/6 => 25. It will take 4 turns to accumulate 100 regeneration points and heal by 1 HP. Your healing rate is 1 HP for every 4 turns.

- You have 180 MHP. Your BRR is 20 + 180/6 => 50. It will take 2 turns to accumulate 100 regeneration points and heal by 1 HP. Your healing rate is 1 HP for every 2 turns.

- Same as above, except you're wearing a troll leather armour, which adds 80 to this rate. Your TRR is 50+80 => 130. You accumulate 100 regeneration points and heal by 1 HP every turn, with 30 left over. Your healing rate is 1 HP every turn, with an additional HP every 3.33 turns.

## History

- Prior to 0.30, base regeneration rate was
`MHP / 3`

if under 60 max HP, and`MHP / 6 + 10`

if over it. Regeneration rate was lower at all max HP levels. - Prior to 0.28, the Regen+ property gave a bonus regen of 100 (1.0 HP/turn) instead of 80.
- Prior to 0.27, the Regen+ property gave a bonus regeneration rate of 40 (0.4 HP/turn) instead of 100.