TheaterCalc
Free, with limitsFree THX/SMPTE/Dolby planning calculators
Free tier & pricing
11 free home-theater calculators including a visual room layout planner; a paid Blueprint guide is upsold.
Last verified Jun 23, 2026. Report a change →
The short answer
A suite of free calculators (screen size, Atmos angles, seating rows, room size) plus a Room Layout Planner.
The facts
- Pricing
- Paid · Free, with limits
- Free tier
- Yes
- Runs in browser
- Yes
- Platforms
- Web
- 2D / 3D
- Basic 3D
- Learning curve
- Moderate
- Export formats
- —
The catch
No major catches — this one’s refreshingly straightforward.
Best for
Standards-based home-theater layout math