Do the lines on an automatic drip coffee maker indicate true cups (8 ounces) or six-ounce servings? In other words, if I filled it to the number 10, would I have 60 oz or 80 oz?

You can check the answer of the people under the question at Quora “6 cup coffee maker how much coffee“

Most coffee brands give directions that use 6 fl. oz. for 1 cup of coffee. To know for sure exactly what your container holds, get a 4 fluid cup Pyrex measuring cup. (32 fl. oz.) Fill your container, then use that to start filling the Pyrex cup. Each time you fill it to the top line, you will have 32 fluid ounces. The container will have more than 32 fl. oz., so fill the Pyrex cup either fully or partially, as many times as necessary. If your container holds 10 – 6 fl. oz. cups, You will fill the Pyrex once then the second time it will have 28 fl. oz., not a full 32 fl. oz. You will end up with 60 fl. oz. for 10 – 6 fl. oz. cups. If your container holds 10 – 8 fl. oz. cups, the Pyrex will fill twice, (64 fl. oz.) then another 16 fl. oz. to equal 80 fl. oz. for 10 – 8 fl. oz. cups. If the total of your measurement is a completely different amount, adjust accordingly. 4 cup Pyrex measuring cup is below.

To be absolutely certain, take a known container where you can measure 8 oz. (Thinking you could borrow a measured flask) Fill and dump say 10 containers into your coffee maker and see what it’s measure lines read. Another way would be to fill the coffee maker to the “number 10” then dump the contents into a sufficiently sized container and weigh it. Then empty said container and weigh it again. Subtract the container weight from the previous weight and now you have the weight of the water. Convert that weight to oz (just type it into the URL of your browser) and have your answer.

There is a lot of confusion here. The US bureau of standards says a cup is 8 ounces (227ml) but that is a standard measuring cup. The size of a standard coffee cup is 6 ounces (170 ml) and that is set by the coffee industry. Your coffee maker uses the 6 ounce measure to mark the gradients. Read here:

A standard is a document which usually defines a number of requirements adopted by the actors of an industry. Trade associations who interact across industry actors, like the Specialty Coffee Association, may act as standardization bodies, or those who work to define and publish standards. Standards can be developed for technical aspects of products, equipment, or venues and non-technical categories, like professional competencies or sustainability. Standards can also include definitions or vocabulary to create a common language. Coffee Standards — Specialty Coffee Association

and here:

The Key Factor of a True “Cup” of CoffeeTwo officially recognized coffee associations (see below) determine the standards for coffee. These standards are used as guidelines worldwide when it comes to brewing coffee.

National Coffee Association of the U.S.A.They set the “ Golden Ratio ” of 1-2 Tbsp. of coffee per 6 oz. of water.

Specialty Coffee Association of AmericaThey set the “ Golden Cup Standard ” of 55 gm of coffee per 1 liter of water.

How Many Ounces Are In A Cup Of Coffee? – Triple Bar Coffee

To test it, measure 4 cups (32 ounces) of water and pour it into the coffee maker carafe, it will be more than 5 but less than 6 cups. Then do the reverse and measure 4 cups in the carafe and pour it into the measuring cup, it should be 24 ounces or 3 standard cups.

Additional confusion stems from the coffee cup makers who usually make mugs, carafes, thermoses, etc. in gradients of 8 ounce cups.

Original question: Do the lines on an automatic drip coffee maker indicate true cups (8 ounces) or six-ounce servings? In other words, if I filled it to the number 10, would I have 60 oz or 80 oz?

I do not have your coffee maker. I do not know the brand. Mine is pretty close to being correct. Of course there is some steam evaporation and there is a bit or water in the cone filled with ground coffee.

No, they all use mini-cups. Depending on brand it may be any of 5 fl oz, 6 fl oz, or 150 mL, but I don’t think any use 8 fl oz cup markings. Recommend you measure by using measuring cup.