Readability (also Resolution, Scale Division, Scale Interval, Increment, Digit, d) – On electronic and digital scales, this is the smallest change in mass that corresponds to a change in displayed value. In other words, this is the amount that the scale will increment by as weight is added or removed. On analog (mechanical) scales, this is the smallest subdivision of the scale dial or beam for analog indication. Example:

152.358g is weighed on a scale with 0.001g readability
The display will read "152.358g".

152.358g is weighed on a scale with 0.01g readability
The display will read "152.36g"

Readability should not be confused with accuracy which is a separate concept. When properly calibrated and adjusted, most scales will be accurate to within plus or minus two scale divisions (+/-2d), though this can vary depending on individual specifications.