Estimate your stamp's grade before you invest in a professional assessment.
See the most probable grade and the full range of likely outcomes. That's the data you need to make a better-informed decision about submitting, buying, or pricing before you invest in grading.
Free while in beta · No account or sign-up needed
Try it on a real stamp
Pick a stamp to load its details, then reveal the PreGrade. These are real PreGrades, run through the same model you'll use. When you're ready, predict the grade of your stamp ›
Want the background first? Read our guides on how stamp grading works and why centering drives the grade.
Have feedback on a result, or a stamp the PreGrader should handle better?