Word Pronunciation & Dictionary

km/s

Word Rarity Uncommon

Frequency: Zipf frequency 4.36 in modern English

Syllables: km/s
IPA

9

Scrabble Score

3

Letters

1

Syllables

3

Unique Chars

Meaning

n

the ratio of the distance traveled (in kilometers) to the time spent traveling (in seconds).

Example Sentences

"Light travels in vacuum at the speed of almost 300,000 kilometers per second."

Synonyms

kilometers per second kilometres per second

Questions

What does km/s mean?: the ratio of the distance traveled (in kilometers) to the time spent traveling (in seconds).

How to pronounce km/s

Open the pronunciation page — Open the Speakur entry for “km/s”.
Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
Play the audio — Click Play to hear reference audio for “km/s”.
Repeat and practice — Say “km/s” aloud, matching stress and vowels until it feels natural.