Priming sugar far 1/2gallon?

[StankAle]

I am kegging my first beer into a 5 gallon corny.
I usually brew about 5.5 gallons of beer per batch.
I want to bottle the remaining .5 gallons of beer so I don't waste it!
Can any of the wise ones out there recommend a proper amount of priming sugar for roughly .5 gallons of brew?
Thanks as always.
By the way the brew is a cascade/ amarillo APA @ 5.8%abv.

Edit: I am actually trying to think for myself (shocker):
5 gallons = 5 ounces priming sugar....so
1/2 gallon = 1/2 ounce?
Let me know if this is "fuzzy math"
thanks.

 

[Kayos]

Half ounce is about right. Use this from now on for any quantity.

 

[Brewsmith]

Get some carbonation drops and do it per bottle.

 

[StankAle]

Thank you gentlemen. Great advice; exactly what I needed.