How many A4 size TEXT paper can a black hp 21 cartridge print both sides?

Well the HP 21 is rated for 150 pages at 5% coverage on letter size paper.





Since Letter and A4 are close in size, doing double sided, I would guess you would be doing about 50-75 pages before it runs empty. Depending on what quality setting you have it at.How many A4 size TEXT paper can a black hp 21 cartridge print both sides?
That's going to depend a lot on what you print - you make both sides 100% black, you're going to burn through that cartridge a lot faster than if you're just printing a few lines of text on each page.....How many A4 size TEXT paper can a black hp 21 cartridge print both sides?
an HP 21 is rated for 150 pages at 5% coverage, continuous print, on draft mode.





So if you are printing in ';normal mode'; double sided expect to only get about 40-50 pages double sided. This is of course assuming you do not stop and restart printing.