Quick Answer

Real concrete grinding production runs at roughly 10 to 40 m² per hour on a handheld 250 mm machine, 20 to 60 m² per hour on a 400 to 480 mm single-head grinder, and 50 to 160 m² per hour on a 550 to 700 mm planetary ride-on, depending on grit stage. In square feet, that is about 108 to 430 ft² per hour, 215 to 645 ft² per hour, and 540 to 1,720 ft² per hour respectively. These are typical working rates on average 3,000 to 4,000 PSI concrete, and they drop sharply on hard, abrasive, or joint-heavy slabs. Plan production by stage, not by a single hourly number, and remember that edging and cleanup add overhead no cutting rate covers.

What Moves the Number

Production rate is the area you actually finish in one billable hour, and it is a blend of machine width, abrasive aggressiveness, slab condition, and how much time you spend not cutting. Two crews on the same grinder can finish 30 percent apart in a day purely because one team stages tooling and empties the vacuum in rhythm while the other stops and starts. Before quoting a floor, separate the cutting rate from the overhead that every job carries, because a floor plan that ignores changeovers always slips behind schedule by mid-afternoon.

Machine class and working width

Wider machines cover more floor per pass, but the gain is not linear. A 700 mm planetary grinder is not three times faster than a 250 mm handheld, because the heavier machine also takes longer to turn, set up, and move between rooms. Walk-behind single-head units in the 400 to 480 mm range are the sweet spot for most indoor commercial work, wide enough to earn money on open bays, yet light enough to carry through doorways and down stairs when the job demands it.

Abrasive grit and bond stage

Coarse metal-bond diamond grit bites fast and removes stock quickly, while fine resin pads cut gently and spread over more passes. The same machine at 30/40 grit removes the most area per hour in raw terms, but it leaves scratches that later stages must heal, so true daily output depends on the whole sequence, not the first pass. A crew that quotes only the coarse rate will be surprised when the fine passes take longer than expected.

Typical Rates by Machine Class

The table below lists typical working rates for average concrete. Treat them as planning numbers, not guarantees; hard or siliceous slabs pull the figures down, and easy cream floors push them up. Figures are given in m² per hour with ft² per hour in parentheses, and they assume dry grinding with a properly sized vacuum and a trained operator.

How the Abrasive Stage Changes Output

Coarse stock removal

At 16, 20, or 30/40 grit, the machine bites off the surface paste and opens the aggregate. This is where the fastest raw numbers appear, especially on old laitance, glue, or a thin coating. Expect the abrasive to wear faster on hard concrete, so tooling changes come every hour or two rather than every four or five, and those stops sit inside the hourly average you quote.

Medium and fine grinding

Once you move to 80, 120, and 150 grit, each pass removes less material, so the floor needs more overlapping passes to reach a uniform scratch pattern. Fine resin pads cover ground quickly but depend on clean floors and a flat machine; a vibration or an uneven driver drops the rate noticeably, and a floor full of swirl marks means the crew will spend extra hours blending the finish.

Site Factors That Eat Through the Day

• Slab hardness and PSI: concrete over 4,000 PSI grinds 20 to 40 percent slower than soft 3,000 PSI mix, and abrasive wears faster on both.
• Edges and columns: a floor with many corners, doorways, and columns spends half its time on handheld edging, which runs at handheld rates even when the center is run by a large grinder.
• Dust control and tool changes: emptying the vacuum, cleaning filters, and swapping discs realistically costs 10 to 15 percent of the day and must be priced in.
• Crew setup: a two-person team that stages tooling, water, and extension leads outpaces a solo operator on every floor over 200 m².

Planning the Day's Production

Quote the job as a sequence. For a 500 m² retail floor, plan coarse grinding with a 480 mm machine at about 40 m² per hour, medium at 45 m² per hour, and fine at 55 m² per hour, then add tool changes and cleanup on top. A single machine and operator will take the better part of two days, not the six hours a naive single-rate estimate suggests. Track your own rates on the first job of each new concrete type, because your crew and your tooling will differ from the typical ranges above, and that logged data becomes the margin on every later bid.

FAQ

How much can a handheld grinder finish in a day?

A 250 mm handheld on average concrete finishes roughly 150 to 250 m² across a full eight-hour day once setup, edging, and tool changes are included. That figure covers edging and touch-up work, not a whole open floor run on its own.

Does polishing run slower than grinding?

Fine polishing passes cover area quickly in m² per hour, but they require more passes and densifier curing windows, so the net daily floor for a polished system is usually lower than a simple grind and seal.

Should I price by area or by hour?

Price by area for fixed-scope floors, but keep hourly rates in hand for change orders, patch work, and unknown slabs. The typical ranges above let you convert either way once you know the grit sequence.