regex101: JavaScript Substitution Workspace

Pro

Group 1((?:(?<!\d)(\d{1,4}(?:[\.,]\d{1,6})?)\s+((?:kilogram|kilos|kg)))|(?:((?:kilogram|kilos|kg))\s+(\d{1,4}(?:[\.,]\d{1,6})?)))

1st Alternative(?:(?<!\d)(\d{1,4}(?:[\.,]\d{1,6})?)\s+((?:kilogram|kilos|kg)))

Non-Capturing Group(?:(?<!\d)(\d{1,4}(?:[\.,]\d{1,6})?)\s+((?:kilogram|kilos|kg)))

Negative Lookbehind(?<!\d)

\da digit

Group 2(\d{1,4}(?:[\.,]\d{1,6})?)

\d{1,4}a digit, repeated between 1 and 4 times

Non-Capturing Group(?:[\.,]\d{1,6})?

?repeats the group contents below at most once:

Character Class[\.,]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{1,6}a digit, repeated between 1 and 6 times

\s+any whitespace character, repeated at least once

Group 3((?:kilogram|kilos|kg))

Non-Capturing Group(?:kilogram|kilos|kg)

1st Alternativekilogram

kilogramthe literal text kilogram (case sensitive)

2nd Alternativekilos

kilosthe literal text kilos (case sensitive)

3rd Alternativekg

kgthe literal text kg (case sensitive)

2nd Alternative(?:((?:kilogram|kilos|kg))\s+(\d{1,4}(?:[\.,]\d{1,6})?))

Non-Capturing Group(?:((?:kilogram|kilos|kg))\s+(\d{1,4}(?:[\.,]\d{1,6})?))

Group 4((?:kilogram|kilos|kg))

Non-Capturing Group(?:kilogram|kilos|kg)

1st Alternativekilogram

kilogramthe literal text kilogram (case sensitive)

2nd Alternativekilos

kilosthe literal text kilos (case sensitive)

3rd Alternativekg

kgthe literal text kg (case sensitive)

\s+any whitespace character, repeated at least once

Group 5(\d{1,4}(?:[\.,]\d{1,6})?)

\d{1,4}a digit, repeated between 1 and 4 times

Non-Capturing Group(?:[\.,]\d{1,6})?

?repeats the group contents below at most once:

Character Class[\.,]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{1,6}a digit, repeated between 1 and 6 times

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

26 tokens

Regular Expression

((?:(?<!\d)(\d{1,4}(?:[\.,]\d{1,6})?)\s+((?:kilogram|kilos|kg)))|(?:((?:kilogram|kilos|kg))\s+(\d{1,4}(?:[\.,]\d{1,6})?)))

New

toitnt kg 15.6 oeingoiegn
oinef 45.9009090909 kg eoif
something blah 65.78 kilos ow

Substitution

*THIS IS THE NUMBER: '$2$5'* AND *THIS IS THE UNIT: '$3$4'*

toitnt kg 15.6 oeingoiegn
oinef 45.9009090909 kg eoif
something blah 65.78 kilos ow