Dice Roll Conversion Chart

From	To	Result
1	1	-4
2	6	-3
7	19	-2
20	38	-1
39	62	0
63	81	1
82	94	2
95	99	3
100	100	4

The above is for converting d100 into FATE dice, which are 4 dice that range from -1 to 1 (d3 - 2)