Priming sugar cups

Goal: 2.5 volumes* CO2

In a 5-gallon batch, this could be achieved by adding ~2/3C dextrose (corn sugar), then fermenting in sealed vessel(s) at ~75F.

But what if I don't plan to bottle the entire 5 gallons?
How much dextrose should I add to a 12oz bottle?
TL;DR: 243.98 cubic mm per ounce of beer.
12 oz: 2927.76 mm3
16 oz: 3903.68 mm3
22 oz: 5367.56 mm3

These scoops measure that amount of dextrose.


*A "volume" is:
"The amount of CO2 is given in volumes. A volume is the space that the CO2 would take up at a pressure of one atmosphere (about 15 pounds per square inch) and at a temperature of 0° C (32° F) — that’s Standard Temperature and Pressure (STP). In other words, if five gallons of beer contained three volumes of CO2, the CO2 by itself would occupy three times the space the beer takes up, or 15 gallons. An average carbonation level is 2.5 volumes of CO2."
Ref: https://byo.com/article/master-the-action-carbonation/