Free tool · practice with example data

Calibration simulator

Practise a calibration meeting before you run one. Move twelve fictional employees around a 1–5 rating grid and a 9-box, watch the rating distribution shift, and see which common rater-bias patterns show up. Or switch to ranking-score mode to see how a weighted score and grade brackets suggest grades for twenty-five people.

Every person here is made up. The board runs in your browser. The before-and-after results unlock with your work email; from then on the board positions are sent to work out the results and are not stored.

The rating board practises the conversation. Ranking-score mode shows how a weighted score and a target distribution can suggest grades before the meeting.

Example data Twelve fictional employees across three example managers. Ratings start as the managers submitted them.

Drag a person to a new box. Or tap a person, then tap Move here. With a keyboard: Tab to a person, then use the arrow keys.

Heuristics, not verdicts

  • Central tendency: 60% or more of ratings at 3, or very little spread. Raters may be avoiding hard calls.
  • Leniency or strictness: 70% or more of ratings at the top (4–5) or bottom (1–2), or an average of 4+ or 2 and under.
  • Clustering by one manager: one manager’s average is a full point away from everyone else’s, or they gave every person the same rating. It might be a genuinely stronger or weaker team, so ask for evidence.
  • Recency hint: the evidence note mentions a strong or weak finish, and the rating follows that recent event rather than the whole period.
  • Grid mismatch: the 1–5 rating and the 9-box performance column disagree (1–2 low, 3 moderate, 4–5 high).

The hub’s calibration guide recommends calibrating against scorecard evidence rather than a 9-box. The 9-box is here because many teams still use one, and moving people on both boards shows how two opinions on one grid can disagree.

The thresholds match the rule-of-thumb ratings check on the tools page. Real calibration needs real evidence: goals, feedback and examples from the whole cycle.

Before your real calibration meeting

Want a quick read on your own process first? Try the performance review diagnostics.

Planning your next calibration round?

Talk it through on a 15-minute discovery call with Ash Taherian, Product Sales Specialist at Revolut People. No preparation needed.