Set Math: Film Calculator

FREE Camera Calculator for Filmmakers

Set Math is the essential toolkit for cinematographers, camera assistants, and DITs. 16 professional calculators in one beautiful, offline-first app.

16 PROFESSIONAL TOOLS:

Exposure & Filters:
• ND Filter Calculator — Convert stops, ND factors, and optical density instantly
• Shutter Speed Calculator — FPS to shutter speed using the 180° rule
• Exposure Triangle Calculator — ISO, aperture, and shutter speed relationships
• EV / Lighting Calculator — Inverse square law for stop changes
• Aperture/T-Stop Calculator — Convert f-stops to T-stops and calculate light transmission

Focus & Framing:
• Depth of Field Calculator — Calculate near/far focus limits and hyperfocal distance
• Hyperfocal Distance Calculator — Quick reference for landscape and wide shots
• Field of View Calculator — Horizontal, vertical, and diagonal FOV for any lens
• Aspect Ratio Calculator — Convert ratios, calculate letterbox/pillarbox dimensions
• Crop Helper — Sensor format to full-frame equivalent

Production Tools:
• Timecode Calculator — Add and subtract timecodes at any frame rate
• Frame Rate Calculator — Speed ramps and slow-motion percentages
• Data Rate Calculator — Estimate storage needs by codec and resolution
• Runtime Calculator — Script pages to estimated screen time

Lighting & Utilities:
• Color Temperature Calculator — Kelvin/Mired conversion and gel corrections (CTO/CTB)
• Unit Converter — Feet ↔ meters, inches ↔ cm

BUILT FOR THE SET:

100% FREE — No subscriptions, no ads, no hidden costs
Works Offline — No internet required, perfect for remote locations
Instant Calculations — No loading, results appear as you type
Premium Design — Light & dark mode, easy on the eyes in any lighting
iPhone & iPad Optimized — Beautiful on all screen sizes
Copy & Share — Export results instantly
Calculation History — Save and review past calculations
16 Professional Tools — Most comprehensive free camera calculator
Smart Organization — Favorites, search, and custom tool ordering

PERFECT FOR:

• Camera Assistants (1st AC, 2nd AC)
• Cinematographers & Directors of Photography
• Digital Imaging Technicians (DITs)
• Gaffers & Lighting Technicians
• Directors & Producers
• Film Students & Indie Filmmakers
• Content Creators & YouTubers