Light Meter3.9-2026-03-14T

The essential light meter app and exposure calculator for film and digital photography. Turn your phone into a precision spot and incident exposure meter trusted by 400,000+ photographers worldwide to nail the perfect exposure, every time.

PRECISION EXPOSURE METERING
• Spot meter - Measure precise exposure points through your camera
• Incident light meter - Measure ambient light falling on your subject via device sensor
• Calibrated and tested for accuracy against professional Gossen and Sekonic meters

YOUR COMPLETE MANUAL PHOTOGRAPHY TOOLKIT
Master manual mode with this powerful suite of 9 calculators:
• Depth of Field (DOF) - Hyperfocal distance, circle of confusion, near/far limits
• Reciprocity Calculator - Long exposure compensation for film photography (Portra, Tri-X, Delta 100, Ektar, HP5, and more). Essential for analog photography.
• EV/LV Converter - Convert between Exposure Value and Light Value systems
• White Balance Meter - Color temperature in Kelvin and Mired
• Bellows Factor - Exposure compensation for macro photography and extension tubes
• Flash Guide Number - Calculate flash power, distance, and aperture relationships
• Sunny 16 Calculator - Classic manual exposure reference
• EXIF Reader - Extract metadata and exposure settings from photos
• Angle of View - Calculate field of view for any lens and sensor combination

GOLDEN HOUR CALCULATOR
• Magic hour times: sunrise, sunset, golden hour, and blue hour
• Plan your landscape and portrait photography shoots with precision

BUILT FOR THE DEMANDING PROFESSIONAL
• Custom ISO, shutter speed, and f-stop ranges
• Half-stop and third-stop increments
• Shutter angle mode - cine meter features for filmmakers and cinematographers
• Live histogram display
• ND filter display options
• Foot-candles and Lux readout
• Built-in exposure timer for long exposures
• Screen lock to keep display awake

SAVE & ORGANIZE YOUR WORK
• Save exposures with GPS coordinates and notes
• Hardware profiles - save camera/lens specs to automatically constrain meter output to your gear's capabilities
• Reference past readings anytime

WORKS WITH ANY MANUAL CAMERA
Film SLR • Medium format • Large format • Pinhole cameras • Cinematographic • Digital mirrorless

50+ languages • No internet required for metering

YOUR CREATIVE PARTNER
Whether you're a seasoned filmmaker, dedicated analog enthusiast, or mastering your first manual camera, Light Meter is the only exposure tool you'll ever need. Download now and take confident control of every shot.