Hi, welcome to the forum

I would set this up in a small table (below), then use a VLOOKUP...
A
B
C
D
2
16
0.25
60
3
38
0.50
1
4
53
0.75
5
60
1.00
6
76
1.25
7
98
1.50
8
113
1.75
9
120
2.00

D2= your value
D3=VLOOKUP(D2,$A$2:$B$9,2,1)

When you add your extra variables, just increace the range (bolded)