What this calculator is estimating
The tool starts with a current annual college cost and applies a chosen annual inflation rate for the years until enrollment. It then continues inflating that annual amount through each year of study so the result reflects both pre-enrollment waiting time and cost growth during college itself.
That means the total is a projected sticker-cost path, not a promise of what any one school will charge. Real costs can differ because tuition, fees, room, board, books, transport, and personal expenses do not all rise at the same pace and because institutions change pricing policies over time.