VAS Pain Score Converter

About this calculator

The Visual Analog Scale (VAS) measures pain by having a patient mark a point on a 100 mm line ranging from “no pain” to “worst pain imaginable,” giving a score from 0 to 100. Because many clinical records, research studies, and pain-management protocols instead use the simpler 0-10 Numeric Rating Scale (NRS), this calculator converts a VAS millimeter score to its NRS equivalent (dividing by 10) and classifies it into standard pain categories such as mild, moderate, or severe.

Both scales are widely used pain-assessment tools in nursing, anesthesiology, and pain-management medicine, and being able to convert between them matters when comparing pain scores recorded in different formats across visits, studies, or hospital systems — a VAS score from a research paper, for instance, often needs to be translated to NRS to match a hospital's standard charting scale.