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HP LaserJet Pro 400 M451dn Workgroup Up to 21 ppm 600 x 600 dpi Color Print Quality Color Laser Printer

  • Up to 21 ppm
  • 600 x 600 dpi Black Print Quality
  • Ethernet 10/100BaseTX (RJ-45)
  • Up to 40,000 pages monthly
  • 128 MB Memory, std.
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Learn more about the Hewlett-Packard M451dn

Cartridges Compatible

Cartridges Compatible
305A Y
305A BK
305A C
305A M
305X BK
305X BK 2-pack
305A CYM 3-pack


LaserJet Pro 400
Recommended Use
15.9" x 19.1" x 12.7"
15.9" x 27.1" x 12.7" max.
52.1 lbs.


Output Type
Laser Technology
Black Print Speed
Up to 21 ppm
Color Print Speed
Up to 21 ppm
Black Print Quality
600 x 600 dpi
Color Print Quality
600 x 600 dpi
Time To First Page (seconds)
17 sec.
Print Languages, std.
HP PCL 6, HP PCL 5c, HP postscript level 3 emulation
Duplex printing
Max. Duty Cycle
Up to 40,000 pages monthly

Media Handling

Paper Trays, std.
Paper Trays, max.
Input Capacity, std.
300 sheets
Input Capacity, max.
550 sheets
Output Capacity, std.
150 sheets
Media Type
Paper (bond, brochure, colored, glossy, letterhead, photo, plain, preprinted, prepunched, recycled, rough), postcards, transparencies, labels, envelopes
Media sizes supported
Tray 1: Letter, legal, executive, 8.5 x 13 in, 3 x 5 in, 4 x 6 in, 5 x 8 in, envelopes (No 10, Monarch); Tray 2, optional Tray 3: Letter, legal, executive, 8.5 x 13 in, 4 x 6 in, 5 x 8 in, envelopes (No 10, Monarch); Automatic duplexer: Letter, legal, executive, 8.5 x 13 in

Tray 1: 3 x 5 to 8.5 x 14 in; Tray 2, optional Tray 3: 3.94 x 5.83 to 8.5 x 14 in


USB Ports
Network Ports
Ethernet 10/100BaseTX (RJ-45)

Hardware SPEC

Memory, std.
128 MB
Memory, max.
384 MB
Power Requirements
110 to 127 VAC (+/- 10%), 60 Hz (+/- 3 Hz)
Power Consumption
425 watts (Active), 15.2 watts (Ready), 4.0 watts (Sleep), 0.5 watts (Off)


Windows Compatible
Full software installs supported on: Microsoft Windows 7 32-bit and 64-bit, Windows Vista 32-bit and 64-bit, Windows XP 32-bit (SP2 or higher);

Driver only installs supported on: Microsoft Windows Server 2008 32-bit and 64-bit, Windows Server 2003 32-bit (SP3 or higher)
Macintosh Compatible
Mac OS X v 10.5, v 10.6


Package Contents
Printer; Four preinstalled introductory HP LaserJet toner cartridges (yield ~1400 pages); In-box documentation (Hardware installation guide); Software drivers and documentation on CD-ROMs; Power cord; Built-in Automatic duplexer for two-sided printing

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Hewlett-Packard M451dn

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  • Dominik H.
  • 3/25/2014 12:54:18 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

3 out of 5 eggsCheap printer with negatives

Pros: Low price. Duplexes.

Cons: Toner cartridge capacity pretty low. Doesn’t know, when the toner is really out, like me previous HP printer. Doesn’t play so well with OS X. Illustrator and Acrobat can’t print from the multi-purpose tray.

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  • Jerry C.
  • 1/8/2014 12:27:31 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggs

Pros: USB connection, and network connection. All the colors of ink come out in a nice tray. My wife likes the white color. And of course, the print quality is excellent. OH... and to my surprise, this thing can print on both sides of the paper at the same time. Epic printer!

Cons: It doesn't cook me breakfast, but it does motivate my wife to do so.

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  • Susan B.
  • 1/16/2013 6:07:52 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

4 out of 5 eggsLove this printer

Pros: Color, envelope handling, HP Eprint, Good for Small Office/Home Office

Cons: slow to print first page, toner cost

Other Thoughts: I bought this printer to replace an Oki C530dn that I'd had for over a year. The Oki had color matching issues and envelope handling problems that I couldn't solve. This is a relatively new model of printer for HP, so there wasn't a track record, but I've always had pretty good luck with the higher end HP products.
I needed this printer to print our company's letterhead, envelopes and business cards with acceptably high quality in the same color I see on the screen. I'm very happy with the color matching I'm getting from the HP LJPro 400. My Oki wrinkled the envelopes when I printed the return address on them; the HP handles this task flawlessly. In fact one of our partners thought I was getting them printed by an offset printer.
HP Eprint software comes with the printer, and I have used that successfully to print while out of town. It's also compatible with Apple's IPad and IPhone, so my husband is able to print from his Apple devices.
It comes with the small toner cartridges installed, so after printing ~800 sheets, I'm down to 60% capacity in the color cartridges and 40% capacity for the black cartridge. I'll replace these as they used up with the larger capacity cartridges. Since it's not my default printer, I'm hoping to get a year out of each cartridge. So far I'm on track. It will cost in the neighborhood of $400 to replace all four toners.

10 out of 10 people found this review helpful. Did you? Yes No

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