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About this tool
Workflow-specific calibration targets and a step-by-step checklist for web, print, Rec.709 video and HDR displays.
This checklist turns a choice of workflow — web and sRGB, print soft proofing, Rec. 709 video or HDR PQ — into the white point, tone curve, white luminance and room-light targets that the governing standard specifies, then orders the setup steps so nothing has to be measured twice. It also warns when your measured ambient light is outside the range the workflow assumes and dates the next calibration from panel hours or the 30-day calendar cap, whichever comes first.
Open Display Calibration Checklist on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Every number is attributed to the specification it comes from, not to habit.
Room, hardware, software and verification run in the order that stops rework.
Choose 'no colorimeter' and the checklist swaps in a visual method and says what it cannot deliver.
For screen work, 80 to 120 cd/m² is the usual range — sRGB is defined against 80 cd/m² with a 64 lux ambient in IEC 61966-2-1. SDR video grading targets 100 cd/m² in a dim room, and soft proofing typically runs 100 to 160 cd/m² so the screen matches a D50 print viewer.
Use D65 for anything delivered to screens, including web, UI, photography and video. Use D50 only for print and soft proofing, where the screen is being matched to prints viewed under an ISO 3664 D50 light.
Roughly every 200 hours of panel use, and no longer than a month between runs — at eight hours a day that works out to about every 25 days. Recalibrate immediately after moving the display, changing the room lighting or updating the graphics driver.
You can get closer than factory defaults by selecting the sRGB or D65 OSD preset, matching screen brightness to white paper under your room light, and checking gamma and clipping with a test pattern. It is a visual match, not a measurement, so do not sign off colour-critical work on it.