| Edge | Angle | Range | Comments | |
| Razor | 11" | +/-1 | As thin as possible. | |
| Scalpel type skinner | 12" | +/-1 | As thin as possible | |
| Gut Hook | 15" | +/-5 | ||
| Fillet Knives | 18" | -5 | As thin as possible | |
| Meat slicers | 18" | +/-2 | ||
| Skinners | 20" | +/-5 | ||
| Paring Knives | 20" | +/-2 | ||
| Finishing Adze | 20" | +/-4 | ||
| Softwood Chisel | 22" | +/-2 | +4 for mallet work | |
| Utility Knives | 22" | +/-2 | ||
| Plane Iron | 24" | ? | ||
| Roughing Adze | 24" | +4 | ||
| Woodcarving Knives | 24" | +/-2 | ||
| Skinner with belly | 25" | +/-5 | ||
| Double bitted Axe | 25" | +/-3 | ||
| Felling Axe | ||||
| Camp Axe | ||||
| Splitting Axe | ||||
| Hatchet | ||||
| Long Jack Plane Iron | ? | |||
| Wood Chisel | 25" | +/-2 | +4 for mallet work | |
| Woodturning Chisel | 26" | ? | ||
| Spindle Gouge | 27" | ? | ||
| Spindle Knife | ||||
| Hardwood Chisel | 28" | +/-2 | +4 for mallet work | |
| Spokeshave | 28" | |||
| Mortise Chisel | 32" | +/-2 | ||
| Bowl Gouge | 50" | ? | ||
| Chip Carving Knife | 50" | +/-10 | ||
| Stone Handaxe | 55" | ? | ||
| Scissors | 60" | ? | ||
| Drawknife | 76" | ? | ||
| Lathe tooling | 80" | ? | ||
| Stone Scraper | 85" | ? | ||
| Sen | 85" | +3 | ||
| Scraper | 90" | -3 |
Not everybody is good at trigonometry but here is an easy way to figure out grind angles.
If you come across a knife and want to figure out what the angle is ground to here is a rough guide All you have to do is figure out the ratio between the bevel width and the thickness and compare it to the chart.
Here is the chart.
If the width of the bevel is 0.75 times the thickness the edge angle is 84.0 degrees
If the width of the bevel is 1.00 times the thickness the edge angle is 60.0 degrees
If the width of the bevel is 1.50 times the thickness the edge angle is 38.9 degrees
If the width of the bevel is 2.00 times the thickness the edge angle is 29.0 degrees
If the width of the bevel is 2.50 times the thickness the edge angle is 23.1 degrees
If the width of the bevel is 3.00 times the thickness the edge angle is 19.2 degrees
If the width of the bevel is 3.50 times the thickness the edge angle is 16.4 degrees
If the width of the bevel is 4.00 times the thickness the edge angle is 14.4 degrees
If the width of the bevel is 4.50 times the thickness the edge angle is 12.8 degrees
If the width of the bevel is 5.00 times the thickness the edge angle is 11.5 degrees
If the width of the bevel is 5.50 times the thickness the edge angle is 10.4 degrees
If the width of the bevel is 6.00 times the thickness the edge angle is 9.56 degrees
If the width of the bevel is 6.50 times the thickness the edge angle is 8.82 degrees
If the width of the bevel is 7.00 times the thickness the edge angle is 8.19 degrees
If the width of the bevel is 7.50 times the thickness the edge angle is 7.65 degrees
If the width of the bevel is 8.00 times the thickness the edge angle is 7.17 degrees
If the width of the bevel is 8.50 times the thickness the edge angle is 6.74 degrees
If the width of the bevel is 9.00 times the thickness the edge angle is 6.37 degrees
As you can see the numbers hit some fairly significant angles in knife making. 19.2 degrees is close to 20 which is a common edge angle for many knives while 9.2 degrees is getting down to razor angles. So this chart should serve as a fairly useful quick and dirty reckoner.
Thanks to the guys on the Knifelist.
