Two numbers decide every mutation stack: how many mutations a stat needs, and how many clean females those mutations will consume. Enter the stat points you have already spent and the points you are aiming for, and this works out both, plus the level gain and the 255-point cap check. Everything runs in your browser — no signup, no server.
Mutation stacking calculator
One mutation adds 2 levels to one stat, and one level is one stat point, so a mutation is worth 2 points. Everything here counts points, not the displayed stat value — that is why the cap check compares against 255 points and not against your stat number. Rounding is always up to the next whole mutation, and clean females are rounded up because you cannot use a partial one.
Line tracker: is your female still clean?
The rule is on the combined count: maternal plus paternal. A parent whose two sides add up to more than 20 no longer produces mutations, so that parent should be replaced. This is why a female with 0 maternal mutations but 20 paternal mutations is already spent.
How the math works
Three mechanics drive every number above, and all three are documented across the wiki and community breeding references:
- One mutation = +2 levels in one stat. The mutated stat — and nothing else — moves up two levels. Thirty mutations is sixty levels above base.
- A parent stops producing at a combined 20. The maternal and paternal counters are read per side, but the rule that decides whether a parent still breeds mutations applies to the two sides added together. Once the combined count passes 20, that parent no longer produces mutations and should be replaced.
- Stats cap at 255. The cap counts stat points, not levels, so most practical lines hit it only at extreme mutation counts. Once a stat is capped, further mutations in that stat do nothing.
For the full stacking method — the clean-stable setup, the promote-and-retire cycle, and the mistakes that waste weeks — read the complete breeding mutations guide.
Frequently asked questions
How many mutations do I need for a target stat? Work in stat points, not displayed values. One mutation is 2 levels and one level is one point, so subtract the points you have already spent from your target and divide by two. Going from 40 points to 120 points is 80 points to gain, which is 40 mutations, 80 levels added and 2 clean females.
How many clean females will my line consume? One per twenty mutations. The tracker above shows how much room is left on any given parent, based on its combined count.
What if my target is above 255? The stat is capped. Mutations past the cap do nothing, so plan lines around the stats your role actually uses rather than stacking everything.
Does this calculator work for Ascended too? The mutation mechanics are the same in Ark: Survival Ascended. Ascended adds traits on top through its own system, which is a separate project from the classic mutation stack.