Real search intent, not page count
Pages are created when a distinct user task deserves its own tool or explanation. Keyword variations are consolidated when the underlying problem and answer are the same.
Original value
Calculator pages combine the formula, live calculation, interpretation, limitations and next action. Guides are written around a decision or workflow rather than padding a keyword with generic prose.
Updates
Existing pages are revisited when provider fees, terminology, source material, search intent or tool behavior changes.