INT vs EXT — What They Mean in a Scene Heading

INT. and EXT. are the two abbreviations that begin almost every scene heading. INT. means interior — the scene takes place indoors. EXT. means exterior — the scene takes place outdoors. Together with the location and time of day, they form the slugline: INT. COFFEE SHOP — DAY.

What INT. and EXT. Actually Tell the Reader

The abbreviation is not about where the camera is — it's about where the scene is. More importantly, it's a production signal:

• INT. = build or rent an interior; lighting is controlled
• EXT. = location shoot; weather, daylight, and permits apply

That's why a script that's 90% INT. reads as cheap and containable, and one that's 70% EXT. with storms reads as expensive. Readers and line producers notice.

The Three Forms

INT. — Interior

INT. DETECTIVE'S OFFICE — NIGHT

The scene happens inside: an office, a bedroom, a warehouse, a cave, the inside of a spaceship.

EXT. — Exterior

EXT. GOLDEN GATE BRIDGE — DAWN

The scene happens outside: a street, a beach, a bridge, outer space (space is always EXT.).

INT./EXT. or I/E. — Moving Between Both

When a scene starts inside and continues outside (or follows characters through a doorway mid-scene):

INT./EXT. MARA'S APARTMENT — CONTINUOUS

Use it sparingly — only when the crossing of the threshold is part of one continuous moment.

Special Case: Cars and Other Vehicles

Vehicles get their own convention. A scene inside a moving car is:

INT. SEDAN (MOVING) — DAY

Add EXT. when we cut outside to the car on the road:

EXT. FREEWAY — DAY

The sedan weaves through traffic.

INT. SEDAN (MOVING) — CONTINUOUS

The I/E. shorthand is common for driving scenes that intercut inside and outside the car:

I/E. SEDAN (MOVING) — DAY

Choosing When It's Ambiguous

• A porch — EXT. (it's outside the building envelope) unless the scene is enclosed
• A greenhouse, tunnel, or covered bridge — usually INT. (you're structurally inside)
• A stadium — EXT. for the field and stands, INT. for the locker room
• A tent — INT. once characters are inside it
• Outer space — always EXT., even inside a spacesuit

Rule of thumb: could it rain on the characters? If yes, EXT.

Common Mistakes

• Switching for the camera. Don't write EXT. because the camera is outside looking through a window — the scene is INT.
• Toggling mid-scene. If characters move from kitchen to yard in one continuous beat, that's INT./EXT. or a new heading — not alternating INT./EXT. every few lines
• Forgetting the period. It's INT. and EXT. with periods — small thing, but consistency reads professional

Worked Example

EXT. FARMHOUSE — NIGHT

Wind flattens the corn. A single window glows on the second floor.

INT. FARMHOUSE — KITCHEN — CONTINUOUS

MARA presses her back against the door, listening.

Note how the pair of headings moves us from outside to inside while keeping the tension continuous.

Frequently Asked Questions

What does INT stand for in a screenplay?

Interior — the scene takes place inside a building, vehicle, or structure.

What does I/E. mean?

Interior/Exterior — a scene that moves between inside and outside in one continuous flow, most often used for cars.

Does INT vs EXT refer to the camera position?

No — it describes where the scene takes place (the story's side of the lens), not where the camera sits.

Is it "INT." with a period or "INT" without?

With a period — INT. / EXT. — matching industry convention from Final Draft to produced scripts.

Related Pages

• What Is a Slugline? — the full anatomy of scene headings
• Scene Headings — craft guidance for writing stronger headings
• Screenplay Transitions — connecting one scene to the next