1000 grit sharpens. 3000 to 6000 grit refines. Most kitchens never need to go past that.
If you remember only one thing about grits, remember the ladder: coarse repairs, medium sharpens, fine polishes.
Everything else here is about matching that ladder to the knife in your hand.
Grit numbers confuse people because they do not mean the same thing across brands. A 1000 from one maker can cut faster or slower than a 1000 from another. We will sort that out too, with honest picks for stones that actually earn a place on your bench.
How to Match Grits to the Job
Grit is graded by particle size on the stone surface. Lower numbers mean bigger, more aggressive particles. Higher numbers mean finer particles that leave a smoother finish.
A dull, rolled, or chipped edge needs a coarse stone first. A working edge that just needs freshening needs a medium stone. A polished, hair splitting edge needs a fine finishing stone on top of both.
Skipping straight to a fine stone on a truly dull knife wastes time. The fine grit cannot remove enough steel to fix the geometry. Coarse grits exist for a reason.
| Grit range | What it is for | Typical use case |
|---|---|---|
| 220 to 400 | Repair, reprofiling | Chips, rolled edges, changing bevel angle |
| 1000 | The workhorse | Routine sharpening, restoring a dull edge |
| 3000 to 6000 | Polish and refine | Cleaning up the burr, everyday kitchen finish |
| 8000 and up | Specialty finishing | Straight razors, high polish edges, showpiece knives |
Most home cooks live at 1000 for maintenance and 3000 to 6000 for polish. A pocket knife carried for everyday cutting does not need the same finish as a sushi knife.
An EDC blade wants a toothy edge that still bites into rope after the shine wears off. A sushi knife wants a mirror polished edge that glides through fish with no drag.
Why Grit Numbers Do Not Match Across Brands
This is the part that trips people up. Japanese waterstones are usually rated on the JIS scale. Some diamond plates and American made stones use FEPA or ANSI numbers instead.
A JIS 8000 stone works out to roughly FEPA F 2000, or about 1.2 microns.
Microns are the one truly proportional measure. A 2 micron abrasive really is twice the size of a 1 micron abrasive.
JIS and FEPA numbers are closer to brand names than measurements. They diverge fast once you get past the coarse end of the range.
There is no agreed industrial standard above roughly 8000 JIS. Anything higher is closer to a marketing claim than a measured spec. Treat those ultra high numbers as a rough finish description, not a hard fact.
Our cross reference chart for JIS and FEPA numbers does that conversion for you.
Combo Stones Worth Buying
A combination stone puts two grits on one block, usually a coarse or medium face and a fine face. For most kitchens, one good combo stone covers the whole routine without buying three separate blocks.
| Model | Type | Best for | Price band | |
|---|---|---|---|---|
| Sharp Pebble 1000/6000 | Aluminum oxide, dual grit | Home kitchens wanting one stone | around $40 | |
| Shapton Kuromaku 1000 | Ceramic, single grit | A fast, splash and go workhorse | around $40 | Price |
| Shapton Glass Stone 1000 | Glass backed ceramic | Owners who want a stone that stays flat longest | around $50 | Price |
Sharp Pebble 1000/6000
Best for Most Kitchens
Aluminum oxide, dual grit stone | 1000 and 6000 on one block | around $40
This combo puts the workhorse and the polish stone on opposite faces of the same block. For a home cook who wants one purchase that covers the whole ladder, this is the practical answer.
Owner reviews repeatedly mention the bamboo case holding steady on hard counters. It slides on softer surfaces like a butcher block. The recurring complaint is a brittle aluminum oxide face that clogs under heavy pressure.
The manufacturer lists a 10 to 12 minute soak before first use, which is longer than most ceramic stones. Skip this one if you want a grab and go stone with zero prep. It also ships with a 20 degree angle guide built for pocket knives, not kitchen blades.
Pros
- One stone covers both the workhorse and polish stages
- Silicone insert keeps the stone from wandering mid stroke
- Affordable entry into two grit sharpening
Cons
- Long soak time before every fresh session
- Base slides on soft cutting surfaces
- Aluminum oxide face can clog under heavy pressure
Shapton Kuromaku 1000
Best Workhorse
Ceramic bonded stone | splash and go, no soak | around $40
This is a single grit stone built for speed. The manufacturer lists it as splash and go. Wet the surface and start sharpening right away, no long soak needed.
Owner reviews repeatedly mention how fast it resets a dull edge and how well it resists dishing over time. It is a good pick for anyone who wants a dependable 1000 grit stone before adding a polishing stone.
Skip this one if you want two separate stones instead of one dual grit block. It is a single stage stone, not a combo.
Pros
- No soaking, ready in seconds
- Resists dishing better than most thin stones
- Fast, consistent cutting on everyday steel
Cons
- Single grit only, you will need a second stone for polish
- Thin profile needs a stable holder
Shapton Glass Stone 1000
Best Premium
Abrasive bonded to tempered glass | one time soak, then splash only | around $50
The glass backing is the whole story here. Instead of a solid ceramic block, the abrasive layer sits on tempered glass. The manufacturer lists this as holding flat longer than a standard stone body.
The recurring complaint in owner reviews is that some stones arrive slightly uneven and need a quick lapping before that first use. After that, most owners report it holding its flat surface for a long stretch of regular sharpening.
This is the pick for someone who sharpens often enough that stone flatness matters more than saving ten dollars. Skip it if you sharpen only a few times a year, since a cheaper stone will flatten just fine with occasional touch ups.
Pros
- Glass backing holds flat longer than typical ceramic bodies
- Only needs a one time soak, then splash only after
- Dense construction resists wear
Cons
- Higher price band than the other two picks here
- Some units need lapping right out of the box
Mistakes to Skip
Do not chase the highest grit number you can find. Above roughly 8000 JIS, there is no real standard behind the number. A 30000 grit stone from one brand may finish no finer than a 12000 from another.
Do not skip the workhorse stone. Jumping from a coarse repair stone straight to a polish stone leaves deep scratches under a thin shiny layer, which dulls fast.
Do not assume a stated grit number means the same thing across brands. A JIS number and a FEPA number are not interchangeable, even when the printed number matches.
The Bottom Line
The bottom line: the Sharp Pebble 1000/6000 covers the full ladder most kitchens need. If you want a faster single stone or one that holds flat longer, either Shapton earns its price band.
What grit should I use for a dull kitchen knife?
Start at 1000. It is the workhorse grit for restoring a working edge without removing more steel than needed.
Do I need anything finer than 6000 grit?
Most kitchens do not. Finer grit polishes the edge further but does not add cutting performance for everyday tasks. Save 8000 and up for specialty edges.
Why does a 1000 grit stone from one brand feel different than another?
Because grit numbers are not one universal scale. JIS, FEPA, and ANSI numbers all diverge from each other, especially at the higher end. Our full breakdown of the 1000 grit workhorse stone covers this in more depth.
What grit fixes a chipped blade?
Start coarse, around 220 to 400 grit, to grind out the chip and reset the edge geometry. Move to 1000 only after the damage is gone.
Is a combo stone better than buying separate grits?
For most home cooks, yes. A combo stone covers the workhorse and polish stages in one purchase. Dedicated sharpeners who sharpen often sometimes prefer separate stones for more control over each stage.
How do I actually use these stones once I have picked a grit?
Grit choice is only half the job. Our companion guide on getting the technique right stroke by stroke covers angle, pressure, and stroke pattern.
Once you own more than one stone, our tool for planning your full stone lineup helps you sequence them in the right order. For more stone and abrasive types beyond this guide, see our broader stone and abrasive shelf.
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