Screen Brightness Nits Meter
Measure the brightness of any screen, monitor, TV, or display using your smartphone camera
Turn your smartphone into a convenient and easy-to-use Nits Meter. Perfect for enthusiasts, professionals and anyone who needs quick screen brightness measurements.
Why Choose Our Nits Meter?
Reliable Measurements
Pre-calibrated for consistent readings, with built-in calibration feature for optimal accuracy on your specific device.
Easy to Use
Simply point your device's camera directly at the screen surface you want to measure. Position perpendicular at close range for best results.
Versatile Applications
Great for production professionals, gaming enthusiasts, home theater setup, display adjustment, and anyone curious about screen brightness levels.
Multiple Units
Supports Nits (cd/m²), Foot-Lambert, Stilb, Lambert, Apostilb, and cd/ft² for professional flexibility.
Excellent Value
Convenient screen brightness measurement without needing expensive dedicated equipment.
Why Are My Measurements Lower Than Expected?
If your measured nits are lower than the manufacturer's stated maximum brightness, there are several reasons why a screen rarely reaches its advertised peak brightness during measurement:
Peak vs Sustained Brightness
Manufacturers often advertise peak brightness, which the display can only achieve for brief moments in small highlight areas. The sustained full-screen brightness is typically 30–60% lower.
Automatic Brightness Limiting (ABL)
Most OLED and many LED displays automatically reduce overall brightness when a large portion of the screen is bright. A white test screen will measure significantly lower than a small white patch on a dark background.
Auto-Brightness and Ambient Light Sensors
Many devices adjust brightness based on surrounding light. Even at the "maximum" slider position, some devices still allow the sensor to limit brightness unless auto-brightness is explicitly disabled in settings.
Thermal Throttling
Displays generate heat at high brightness. After a few minutes, the device may reduce brightness to manage temperature, even if the brightness slider remains at maximum.
Power Saving and Battery Management
Battery saver modes, eco modes, and low battery states can silently cap display brightness far below the maximum.
Software Overlays and Filters
Night mode, blue light filters (Night Shift, Eye Comfort), True Tone, and similar features reduce brightness and shift color temperature, lowering measured nits.
HDR vs SDR Mode
Advertised peak brightness often refers to HDR mode with specific high-contrast content. In standard SDR mode, the display typically operates at a much lower brightness ceiling.
Display Age and Wear
OLED screens gradually lose brightness over their lifespan. An older display may no longer reach the brightness levels it achieved when new.
Color Temperature Setting
A warm (yellowish) white point produces fewer nits than a cool (bluish) white at the same backlight level. Measure with D65 (6500K) for comparable results.
Exaggerated Claims
Lastly some manufacturers might exaggerate their screen brightness values.
To get the highest possible reading, try disabling auto-brightness, turning off all power saving modes and night filters, displaying a small white patch on a black background (to avoid ABL), and allowing the screen to warm up briefly before measuring.
Key Features
📏 Real-Time Luminance Measurements in Nits
Get instant, continuous luminance measurements displayed in nits (cd/m²) in real-time. The app continuously updates brightness values as you point your camera at different screens, providing immediate feedback for quick assessments. The real-time nature makes it perfect for comparing different display settings, evaluating brightness uniformity across a screen, or quickly checking multiple devices.
✅ Pre-Calibrated
The app comes pre-calibrated to provide fairly reliable and consistent brightness measurements right out of the box. No complex setup required - simply download the app and start measuring. The default calibration works well for relative measurements. For absolute measurements, calibration is preferred.
🎯 Built-In Calibration Feature
For users who demand maximum precision, the app includes a comprehensive calibration feature that optimizes accuracy for your specific smartphone or tablet. By calibrating with a known reference display or light source, you can fine-tune the measurements to compensate for variations between different camera sensors. This optional calibration ensures you get the most accurate possible readings from your particular device.
🔄 Multiple Measurement Units
Professional flexibility with support for six different luminance units: Nits (cd/m²), Foot-Lambert (fL), Stilb (sb), Lambert (L), Apostilb (asb), and candela per square foot (cd/ft²). Switch instantly between units to match your industry standards, regional preferences, or project requirements.
💾 Save Measurements with Notes
Never lose track of important measurements. Save any reading with a single tap, automatically capturing the measured luminance value, date, and time. Add custom notes to each saved measurement to record context like display model, settings used, viewing conditions, or any other relevant information. Perfect for tracking brightness degradation over time, documenting display configurations, comparing different devices, or maintaining records calibration work.
📖 Detailed Documentation and Help
Comprehensive in-app documentation ensures you get the most from your measurements. Access detailed explanations of luminance measurement concepts, step-by-step measurement instructions, best practices for accurate readings, troubleshooting guidance, and calibration procedures.
⚙️ Customizable Settings
Tailor the app to your specific needs and preferences with the customization options. This includes date and time format, keep screen on, high contrast mode, language, measurement units and more.
📺 Works with All Display Types
Universal compatibility with every modern display technology ensures you can measure any screen you encounter. The app accurately measures LCD displays (IPS, TN, VA panels), OLED and AMOLED screens (smartphones, TVs, monitors), LED displays and video walls, HDR-capable displays (HDR10, Dolby Vision), QLED quantum dot displays, MicroLED displays, and even older display technologies. Whether measuring a laptop screen, smartphone display, television, gaming monitor, professional reference monitor, projector screen, or digital signage, the app provides reliable luminance measurements across all display types.
👆 Simple Point-and-Measure Operation
Effortless measurements with an intuitive, streamlined workflow. Simply open the app, point your smartphone camera directly at the screen you want to measure (positioning perpendicular to the display surface at close range for best results), and instantly see the brightness reading. The straightforward point-and-measure approach makes screen brightness measurement accessible to everyone, from display enthusiasts and gamers to AV technicians.
Great for Display Enthusiasts
Whether you're adjusting your gaming monitor, setting up your home theater, or just curious about display brightness, our Nits Meter provides useful brightness readings to help optimize your viewing experience. Helpful for understanding HDR, OLED, and other display technologies.
Measures Any Screen Type
Works with all display technologies including LCD, OLED, LED, HDR, QLED, and AMOLED displays. Perfect for TVs, computer monitors, smartphones, tablets, and professional displays.
Handy Features
Save measurements with notes, access comprehensive documentation, and use the built-in calibration feature for optimal readings for your specific device.
Need Help or Have Ideas?
We're committed to making this app the best it can be. Your feedback matters to us, and we personally respond to every user who contacts us. Whether you have questions, need support, or have ideas for new features, please reach out to us at [email protected]
Wide Language Support
The app has full support for 40 different languages, making measurement accessible worldwide.
Download the Screen Brightness Nits Meter app now
Enjoy full functionality for a few weeks. After that, choose a one-time fee or subscription — still at a fraction of the cost of a dedicated color temperature meter device.