Holdover Calculator

• Winter 2026–2027 tables. Every holdover and allowance time now comes from the FAA and Transport Canada guidelines issued 11 August 2026. Many times are shorter than last season's and none are longer, so it's worth updating before your next departure. • New and withdrawn fluids. Added: LNT Solutions P250 and P450, MAX TECH MTL 4-EG and MTL 4-PG, MKS DevO COREICEPHOB Type I EG, Turbotect DF I, MAX TECH MTL EG-1 and MTL PG-1. AVIAFlight EG and six other fluids have been withdrawn by the publishers. If a fluid you had picked is no longer listed, the app tells you rather than quietly dropping it. • The note that applies to your reading. Chart notes are now shown for the exact cell your answers land on, not just the column — including the rule that no holdover time exists below −10 °C for freezing drizzle and light freezing rain, which the guidelines print on individual cells. • Type III speed category: "Not sure". The guidelines say to apply low speed test values when you can't establish which ramp test applies to your aircraft. You can now say so directly instead of guessing. Low speed publishes the same times where they overlap — what it changes is the coldest temperature the fluid can be used at. • Snowfall intensity is shown even when it's the reason there's no time. If prevailing visibility means the intensity reads heavy, the result now says so plainly. Plus accuracy and clarity work throughout. Fly safe.