Jackhammer size is measured by weight, and weight determines striking force. As a general rule, the thicker or more reinforced the concrete, the heavier the tool you need.

Light duty (15 to 30 lbs): These electric chipping hammers are built for tile removal, thin mortar beds, and light surface chipping. A 30 lb electric chipping hammer works well for small patch jobs or breaking up a thin concrete walkway, but it won't get through a standard driveway slab efficiently.

Medium duty (45 to 60 lbs): This is the most common size for homeowners and small contractors tackling driveways, patios, and sidewalks. A 60 lb electric breaker jack hammer handles unreinforced slabs up to about 5 inches thick without much trouble, and it's light enough for one person to run for a full workday.

Heavy duty (70 to 90 lbs): Once you're dealing with reinforced concrete, footings, or foundation walls, step up to a 70 lb electric jackhammer or a 90 lb pneumatic breaker jack hammer. These deliver significantly more impact energy and cut through rebar-laced slabs and thick footings much faster than a lighter tool.

Extra heavy / attachment-based: For large-scale demolition, rock removal, or commercial teardown work, a skid steer mounted breaker like a Bobcat concrete breaker attachment or a CID concrete breaker for mini skid steers moves far more material per hour than any handheld tool. These are typically rented alongside the skid steer itself.

Electric jackhammers plug into a standard outlet or generator, which makes them the simpler choice for most residential and small commercial jobs. They're lighter to transport, easier to start and stop, and require no additional equipment. If you're breaking up a patio slab or a section of basement floor, an electric chipping hammer or breaker is usually all you need.

Pneumatic jackhammers, also called air hammers, run on compressed air and generally deliver more consistent striking force at higher weight classes. A pneumatic chipping hammer or a 90 lb air breaker is the standard choice on job sites that already have a compressor running, or for contractors doing heavy demolition day after day where durability under continuous use matters more than convenience.

If you're not sure which fits your project, our guide to construction site rental equipment covers how tools like breakers, compactors, and lifts typically get paired together on active job sites.

How big of a jackhammer do I need? It depends on slab thickness and reinforcement. Unreinforced concrete under 4 inches thick usually breaks up fine with a 45 to 60 lb electric breaker. Anything thicker, reinforced with rebar, or structural (like a foundation footing) calls for 70 lbs or more, and heavy commercial demolition often moves to a pneumatic breaker or a skid steer attachment.

Will a 10 lb sledgehammer break concrete? Yes, but slowly and inconsistently. A sledgehammer can crack thin, already-damaged concrete or knock loose small sections, but it's not a practical substitute for a jackhammer on any slab you plan to fully remove. Renting even a light chipping hammer will save hours of labor and reduce the risk of injury from repetitive swinging.

How long does it take to break up concrete with a jackhammer? A 60 lb electric breaker can typically clear a 10x10 foot unreinforced slab (around 4 inches thick) in 1 to 3 hours, depending on the operator's experience and whether rebar is present. Reinforced slabs, footings, or thicker pours can take significantly longer and often justify stepping up to a 70 to 90 lb unit to keep the job moving.

What's the difference between a demolition hammer and a jackhammer? The terms are often used interchangeably, but technically a demolition hammer refers to a tool built purely for breaking and chipping (no rotary drilling function), while jackhammer is the broader, more common term people use for any heavy breaker hammer used on concrete or asphalt. Breaker hammer is another name you'll see on rental listings for the same category of tool.