Free interactive calculator

Primordial Sea Merge Planner

Turn a target world into transparent merge math. No account, no hidden formula, no fabricated drop forecast.

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The input ladder

All verified normal stages

Read the full chain

1Cosmic Dust
2Pebble
3Rock
4Planetesimal
5Molten Core
6Magma Sphere
7Cooled World
8Rain World
9Ocean World
10Water Planet

Formula

Moving up n stages needs 2ⁿ bodies of the starting tier. Combining them into one target requires one fewer pair merge than the source-body count.

Boundary

The calculation covers the 10-stage normal chain only. It cannot predict physics losses, fuse explosions, enemy attacks, random drops, or unpublished hidden-disk recipes.