What is a nit?
A nit is a unit of luminance equal to one candela per square meter (cd/m²). It measures how bright a display surface appears. Higher nits = brighter display.
The word "nit" comes from the Latin *nitere* (to shine). In display specs, you will see both "nits" and "cd/m²" used interchangeably.
Typical nit values by display type
SDR monitors
HDR monitors
OLED
Outdoor/professional
Nits and HDR
HDR content relies on peak highlights exceeding SDR levels. A scene with a sun reflection might be mastered at 1000-4000 nits in the source, then tone-mapped down to what your display can show.
At HDR400 (400 nits), highlights are tone-mapped aggressively and lose impact. At HDR1000, the highlight range is reproduced much more faithfully.
OLED HDR True Black panels trade absolute brightness for infinite contrast. A 600-nit OLED showing a small bright highlight against pure black looks more impactful than a 600-nit LCD with a 1000:1 contrast ratio.
Nits vs OLED brightness illusion
OLED panels report lower peak white on full-screen patterns (250-400 nits) because white pixels all emit simultaneously and thermal limits kick in. On a small highlight (10% of screen area), OLED hits 800-1500 nits. This is why OLED HDR looks impressive despite lower spec-sheet numbers.
How bright does your monitor need to be?
| Room condition | Recommended nits |
|---|---|
| Dark room, movie/gaming | 100-150 nits |
| Average office lighting | 200-350 nits |
| Bright office / window glare | 400-600 nits |
| Direct sunlight (laptop) | 600-1000 nits |
| HDR peak (gaming/video) | 600-1000 nits peak |
Sustained vs peak brightness
Peak brightness is the maximum for a brief moment on a small area. Sustained brightness (APL – Average Picture Level) is what the monitor can maintain across the full screen. Most panel specs advertise peak. Sustained is what matters for comfort in bright rooms.
A gaming OLED might peak at 1300 nits on a 10% window but sustain only 250 nits full-screen. This is normal and by design.
Use our Brightness Test
Our Brightness Test tool shows PLUGE near-black and near-white patterns plus 16 gray steps. Use these to calibrate your monitor's OSD brightness setting for your viewing environment, regardless of the nit rating.