SHTF Knife Sharpening




In an apocalyptic situation or you are just out in the woods without a sharpening stone, there are many ways to sharpen your knife or axe without one. In this Instructable I will show you a few of them.

Step 1: Car Window

If you are near a car and you can get the window down, just run your knife along the unpolished and rounded part of the glass on the top of the window. Do 3 or 4 passes and flip your knife, repeat until sharp.

Step 2: Coffee Cup

If you flip your coffee cup over there is an un-coated rounded edge that will work the same way as the window works.

Step 3: River Rock

A flat, rounded, and smooth river rock will work almost as well as a real sharpening stone. Just use it like you would use a stone, because it is one...

Step 4: Stropping

Once you have a nice sharp edge you will need to strop your knife.

The nylon straps on your pack work well,


A leather belt/ sheath will work too.

Just hold the strap tight and run the knife along it backwards.

Step 5: Thanks

Thanks for viewing my instructable, and if you have any other ways to sharpen in a SHTF situation, feel free to tell me in the comments.



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    7 Discussions


    3 years ago on Introduction

    I'll have to give the coffe cup trick a go, thanks for the idea.

    The car window one proved to be usefull on a couple occasions already :)

    My goto makeshift knife sharpening implement is sandpaper laid flat on a table.


    3 years ago on Introduction

    The last one is why i wear a leather belt. They also sell inexpensive strops that are light-weight and fairly cheap. I bought one from amazon for $4 for my straight razor.

    1 reply