http://idioms.thefreedictionary.com/it+figures
It figures.
It makes sense.; It confirms what one might have guessed.; I’m not surprised. Bob: Tom was the one who broke the window. Bill: It figures. He’s very careless. Ann: Mary was the last one to arrive. Sally: It figures. She’s always late.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
it figures
Also, that figures. It’s (or that’s) reasonable; it makes sense. For example, Hanging it upside down sounds like a weird idea, but it figures, or It figures that they won’t be coming this year, or So she’s complaining again; that figures.This idiom alludes to reckoning up numbers. [Colloquial; mid-1900s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
How my heart sings 