Concrete vs Cement: What’s the Difference?

Cement is an ingredient — a fine gray powder (usually Portland cement) that acts as the binder. Concrete is the finished material: cement mixed with water, sand, and gravel (aggregate), which hardens into the solid you actually pour and finish.

Saying "a cement driveway" is technically saying "an aggregate driveway" — it's concrete that's being poured, with cement as just one of its ingredients, typically 10–15% of the total mix by volume.

Every calculator on this site that estimates cubic yards for a pour — the Concrete Calculator and Concrete Slab Calculator — is calculating concrete volume, not cement alone.

Mortar adds a third commonly confused term: it's cement mixed with sand and water (no coarse aggregate), used for bonding bricks and blocks rather than structural pours. Mortar and concrete are not interchangeable, even though both start from the same cement.