How much blood came out of the winepress of the wrath of God (Rev 14)?

Enough to come up to the bridles on horses for a space of 1600 furlongs

Which turns out to be about 1.2 x 1014 liters.

And since an adult has about 5 liters of blood, that equates to 2.4 x 1013 (24 trillion) people.

(See How many more will God kill)

And the angel thrust in his sickle into the earth, and gathered the vine of the earth, and cast it into the great winepress of the wrath of God.

And the winepress was trodden without the city, and blood came out of the winepress, even unto the horse bridles, by the space of a thousand and six hundred furlongs. Revelation 14:19-20