Rounding up means always increasing to the next value, regardless of what digit follows. Unlike standard rounding which uses the "5 rule," rounding up ALWAYS goes to the higher number.
ANY decimal rounds UP
Even 0.01 rounds to the next whole number
3.1 → 3 (rounds down)
3.5 → 4 (rounds up)
3.9 → 4 (rounds up)
3.1 → 4 (rounds up)
3.5 → 4 (rounds up)
3.9 → 4 (rounds up)
Can't order 23.7 boxes — you need 24 complete boxes
23.7 boxes needed → Round UP to 24 boxes
Can't hire 5.3 employees — you need 6 people
5.3 staff needed → Round UP to 6 people
Better to have extra materials than run short
15.2 boards needed → Round UP to 16 boards
Round time up to the next 15-minute increment
1 hour 12 minutes → Round UP to 1 hour 15 minutes
=ROUNDUP(12.3, 0) → 13
=CEILING(12.3, 1) → 13
import math
math.ceil(12.3) → 13
Math.ceil(12.3) → 13
If there's ANY decimal, add 1 to the whole number part
12.3 → 12 + 1 = 13
ANY decimal → Round UP
Inventory, people, materials, time