Story structure · Free tool
Save the Cat Beat Sheet Calculator
Turn a target word count into a complete Save the Cat beat map with word and page positions.
Opening Image
The Opening Image gives readers the first emotional snapshot of the story world before the plot starts moving.
Theme Stated
Theme Stated is the early line, challenge, or question that names the story lesson before the protagonist can understand it.
Set-Up
The Set-Up introduces the protagonist, world, stakes, flaws, relationships, and the everyday pressures that make change necessary.
Catalyst
The Catalyst is the event that breaks the protagonist’s current life and makes the old path impossible to continue unchanged.
Debate
Debate is the hesitation after the Catalyst, where the protagonist weighs fear, cost, denial, and the first possible next step.
Break into Two
Break into Two is the protagonist’s active step into the new world of the story.
B Story
The B Story brings in the relationship, mentor, rival, or secondary thread that helps carry the theme.
Fun and Games
Fun and Games is the promise of the premise: the sequence where readers get the clearest version of what they came for.
Midpoint
The Midpoint is the central turn: a false victory or false defeat that changes the stakes and forces the story to sharpen.
Bad Guys Close In
Bad Guys Close In is the tightening section after the Midpoint, where external enemies and internal flaws both gain ground.
All Is Lost
All Is Lost is the lowest point where the protagonist’s plan collapses and the old strategy finally fails.
Dark Night of the Soul
Dark Night of the Soul is the reflection after defeat, where the protagonist finally understands what must change.
Break into Three
Break into Three is the new plan born from the protagonist combining external skill with internal change.
Finale
The Finale resolves the central conflict through a sequence that proves the protagonist has changed.
Final Image
The Final Image is the closing snapshot that shows how the story world or protagonist has changed.
What a beat sheet calculator tells you
A beat sheet turns a structural framework into approximate manuscript positions. Enter the length you are aiming for and the calculator maps every Save the Cat beat to a word count and a standard manuscript page. These are diagnostic landmarks, not deadlines inside the draft.
The percentages come directly from Arbento's complete Save the Cat framework. When a beat covers a range, such as Set-Up or Fun and Games, the calculator shows the beginning and end of that range instead of pretending the whole sequence belongs on one page.
Why percentages work better than fixed pages
A 70,000-word young adult novel and a 120,000-word fantasy novel cannot share the same page numbers, but they can share structural proportions. Percentage positions scale with the manuscript. They also survive formatting changes: font, trim size, and line spacing can change a printed page count without changing the underlying story.
Reading the three acts
Act one: establish and disrupt
The opening establishes a baseline, introduces the thematic problem, and creates pressure through the Catalyst and Debate. Break into Two usually lands around 20 percent, where the protagonist makes an active move into the story's new world.
Act two: explore and tighten
The broad middle delivers the premise, changes direction at the Midpoint, and then narrows the protagonist's options. Use the positions to check whether pressure is changing, not to force a scene break at an exact number.
Act three: understand and prove
After the low point and reflection, Break into Three launches a plan that combines plot skill with internal change. The Finale proves that change under pressure, and the Final Image answers the opening baseline.
For definitions, examples, and common mistakes, read the complete Save the Cat beat sheet.
Story structure
This is the map. Arbento checks the actual scenes.
See how your manuscript uses structure while you write, including missing turns, repeated middle pressure, and the relationship between your opening and ending.