The number, not the unit

Find every number that is immediately followed by a space and the letters kg. The match must be the number alone — the space and the unit are not part of it.

Corpus

Steps0/ 573 · par 191

Every input, what the pattern matched in it, and what each group captured
Input	Match	Steps
	16 matches	48
	5 matches	15
	14 matches	42
	3 matches	9
	6 matches	18

Trace

Select an input to step through what your pattern did to it.

Cmd-Enter submits too.