Regular Expressions 101

Pro

Group 1((?:kilograms?|kilos?|kg)|(?:\d{0,4}(?:\.\d{1,6})))

1st Alternative(?:kilograms?|kilos?|kg)

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

1st Alternativekilograms?

kilogramthe literal text kilogram (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

2nd Alternativekilos?

kilothe literal text kilo (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

3rd Alternativekg

kgthe literal text kg (case sensitive)

2nd Alternative(?:\d{0,4}(?:\.\d{1,6}))

Non-Capturing Group(?:\d{0,4}(?:\.\d{1,6}))

\d{0,4}a digit, repeated between 0 and 4 times

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

\s*any whitespace character, repeated any number of times

Group 2((?:kilograms?|kilos?|kg)|(?:\d{0,4}(?:\.\d{1,6})))

1st Alternative(?:kilograms?|kilos?|kg)

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

1st Alternativekilograms?

kilogramthe literal text kilogram (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

2nd Alternativekilos?

kilothe literal text kilo (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

3rd Alternativekg

kgthe literal text kg (case sensitive)

2nd Alternative(?:\d{0,4}(?:\.\d{1,6}))

Non-Capturing Group(?:\d{0,4}(?:\.\d{1,6}))

\d{0,4}a digit, repeated between 0 and 4 times

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Global pattern flags

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

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

Detailed match information will be displayed here automatically.

25 tokens

((?:kilograms?|kilos?|kg)|(?:\d{0,4}(?:\.\d{1,6})))\s*((?:kilograms?|kilos?|kg)|(?:\d{0,4}(?:\.\d{1,6})))

New

This is some text 14.56 kg and some other text

This is some text kg 14.56 and some other text

This is some text 14.56 kg and some other text

This is some text kg 14.56 and some other text