Knife Sharpener Test Methods

Maximum Sharpness

We test knife sharpeners out on various food items to find out the maximum level of sharpness you can achieve with each sharpening device.

Edge Smoothness

After sharpening, we check the edge of the knife for deformities and rate the edge smoothness achieved by each handheld sharpener.

Material Retention

We test our sharpeners for the amount of metal they peel off a blade as they sharpen the knife to a serviceable sharpness level.

Time to Reach Workable Sharpness

We test the amount of time it takes to sharpen a chef’s knife to a serviceable level, which is a crucial criterion to consider when buying a handheld device.

Material Retention

We check the amount of material removed after an electric knife sharpener brings a dull knife to sharpness level 9.

Speed

We test the speed of electric sharpeners by measuring the time it takes for each to sharpen a knife to beef tandon cutting level.

Edge Quality

We check the knife edge for smoothness, evenness, and width after running it through the electric sharpener.

Continuous Operation Time

We test electric sharpeners for continuous sharpening time by letting it run for 25 minutes straight.