37X
Compatible HP 37X Black High Yield Toner Cartridge (CF237X)
25,000 pages
$69.99
Save 43% vs genuine
HP LaserJet Enterprise MFP M631z toner
Your LaserJet Enterprise MFP M631z takes the 37X (high yield), 37Y (high yield) and 37A (standard yield). At our price that is about 0.3¢ a page.
The HP LaserJet Enterprise MFP M631z is a mono laser printer in the LaserJet Enterprise MFP M631 series, which shares cartridges across 4 models.
It takes two black cartridges that differ only in capacity: the 37A at about 11,000 pages and the 37X at about 25,000. At our prices that is 0.6¢ a page against 0.3¢, so the high-yield cartridge costs less to run unless you print very little.
On this printer the drum is built into the cartridge, so there is no separate drum to buy or reset. Every new cartridge brings a fresh drum with it.
When you compare prices, compare cost per page rather than the sticker price: a cheaper cartridge with half the rated yield costs more to run. Every cartridge here ships free, is covered by our printer damage protection and can be returned within 90 days, opened or not.
Cartridges that fit
37Y
Compatible HP 37Y Black High Yield Toner Cartridge (CF237Y)
41,000 pages
$129.99
37A
Compatible HP 37A Black Toner Cartridge (CF237A)
11,000 pages
$65.99
Save 31% vs genuine
Which yield is worth it
| Cartridge | Yield | Price | Per page |
|---|---|---|---|
| 37X High yield | 25,000 pages | $69.99 | 0.3¢ |
| 37Y High yield | 41,000 pages | $129.99 | 0.3¢ |
| 37A | 11,000 pages | $65.99 | 0.6¢ |
What it costs you a month
About $9.66 a month in toner, roughly one 37X every 3 months.
Questions about the LaserJet Enterprise MFP M631z
What toner does the HP LaserJet Enterprise MFP M631z use?
The 37X, 37Y and 37A. HP lists these cartridges as compatible with this model, and the yields on this page are HP's published figures.
Does using a compatible cartridge void the LaserJet Enterprise MFP M631z warranty?
No. Under the Magnuson-Moss Warranty Act a manufacturer cannot void your warranty because you used a third-party cartridge. If one of ours damages the printer, our printer damage protection covers the repair.
Other HP LaserJet Enterprise MFP M631 models
Most of these share the same cartridges. Check the model page to be sure.
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Page updated Sep 22, 2026. Compatibility checked by Dan Whitaker, Print Technician. Brand names and part numbers are used only to identify compatibility. We are not affiliated with or endorsed by any printer manufacturer.