A briefcase carries documents and a laptop — flat, rigid, hand-carried, sized for papers. A suitcase carries clothes for travel and is much larger, usually wheeled. The names say it: a briefcase held legal briefs, and a suitcase held a suit.
The core difference
- briefcase — a flat case for documents, roughly A4 or letter sized, carried by hand or on a shoulder strap.
- suitcase — a deep case for clothing and travel goods, now almost always wheeled.
Both names are literal. A brief is a written legal summary, and the case carried them. A suitcase was sized to hold a folded suit.
The related bags
- attaché case — a hard-sided briefcase, traditionally the more formal version
- portfolio — a slim case for documents or artwork, usually without a handle on top
- messenger bag — soft, worn across the body, largely displaced the briefcase for laptop carrying
- holdall or duffel — soft and cylindrical, for clothes without the rigid structure
- carry-on — defined by airline size limits rather than by shape
Where the categories blur
The wheeled cabin bag sits between the two: too large for documents alone, too small for a week away, and sold as both a briefcase and a suitcase depending on the retailer. The practical test is what it is sized around — papers and a laptop, or folded clothing.
Luggage as the collective
Both are pieces of luggage, which is uncountable: two suitcases and a briefcase are three pieces of luggage, never three luggages.
Frequently asked questions
What is the difference between a briefcase and a suitcase?
A briefcase is a flat case for documents and a laptop; a suitcase is a much larger case for clothing and travel, usually wheeled.
Why are they called that?
Literally. A briefcase carried legal briefs, and a suitcase was sized to carry a folded suit.
What is an attaché case?
A hard-sided briefcase, traditionally the more formal version of the same thing.