Set Math: Film Calculator

16 Professional Tools in One FREE App! New: Aspect Ratio, FOV, Exposure Triangle, Color Temp, T-Stop & Hyperfocal calculators. For ACs, DPs & DITs. Works offline, no ads!

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