Enter raw unit marks. Each unit is converted to UMS using the session boundaries (linear interpolation, exactly how Pearson does it), then your cash-in grade is worked out from total UMS — including the A* rule for the full IAL. Defaults use January 2026 official boundaries; tap "Edit boundaries" for any other session.
Total UMS
Cash-in grade
Where you sit on the UMS scale
Examiner Tip
UMS is your shield: raw boundaries move every session, but UMS boundaries never do. For the full IAL, A* needs 480/600 overall and 270/300 UMS across Units 4–6 — a stellar AS year alone cannot earn the star. Bank strong UMS early, then attack WPH14 and WPH15.