Compare your Strength with 4 reviewed Cube recommendations, then estimate training time using a rate you measured. This is a checkpoint planner, not a map, unlock chart or lift predictor.
Direct answer
Use the next displayed recommendation as a planning reference
The 4 documented labels, in ascending Recommended Strength, are Wood Cube 6, Stone Cube 61, Cooper Cube 206, Ice Cube 582. They are not proven minimum Strength gates. Compare them with your current reading, then test a Cube in-game.
JavaScript is required for the comparison. The documented targets and formula remain readable without it.
Based on your inputs
Plan your next displayed checkpoint
Enter your current Strength. A measured Strength-per-second rate is optional; it adds a constant-rate time estimate. You can also enter a goal from your current game screen.
No game Strength or training rate is prefilled. Enter your own values to compare the documented labels.
The 4 documented checkpoints
These are field-reviewed Recommended labels, not a complete Cube route. Each record links to its weight and source context.
For each checkpoint, the difference is max(0, displayed Recommended − your current Strength). If you add a measured rate above zero, estimated time is difference ÷ Strength per second.
This is a transparent player-input model, not a recovered game formula.
How to get a useful rate
Record Strength before training.
Keep your Arm, Material and boosts unchanged.
Record Strength after a timed sample.
Divide the gain by elapsed seconds and repeat to compare readings.
Enter that number as your own target. The built-in records have individual review dates in the table, not a claim that every server or later update shows the same values. A user-entered target is never added to the site’s verified Cube database.
What this cannot decide
The official description supports heavier Cubes farther along, but does not publish the Strength-to-weight formula, exact map route or a hard minimum for each lift. A higher displayed recommendation does not prove the preceding Cube must be completed first.