New Living Translation
Do you realize the extent of the earth? Tell me about it if you know!

American Standard Version
Hast thou comprehended the earth in its breadth? Declare, if thou knowest it all.

Berean Study Bible
Have you surveyed the extent of the earth? Tell Me, if you know all this.

Douay-Rheims Bible
Hast thou considered the breadth of the earth? tell me, if thou knowest all things?

English Revised Version
Hast thou comprehended the breadth of the earth? declare, if thou knowest it all.

King James Bible
Hast thou perceived the breadth of the earth? declare if thou knowest it all.

World English Bible
Have you comprehended the earth in its breadth? Declare, if you know it all.

Young's Literal Translation
Thou hast understanding, Even unto the broad places of earth! Declare -- if thou hast known it all.

Job 38:18 Additional Translations ...