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HP recommends Windows.

HP LaserJet Pro 400 colour Printer M451dn

Get professional-quality colour documents with improved productivity.
Produce professional-quality colour documents with ease and speed. Seamlessly integrate into your office or wireless home network[1]. Save paper with automatic two-sided printing[2] and print from virtually anywhere with HP ePrint[3].
  • Two-sided printing
  • HP ePrint and HP AirPrint
  • Tray 1, Tray 2, optional Tray 3: A4, A5, A6, B5 (JIS), 10 x 15 cm, postcards (JIS single, JIS double), envelopes (ISO DL, ISO C5, ISO B5)
  • Up to 20 ppm with USB & Ethernet connectivity
  • Up to 40,000 prints per month
In stock

Estimated Shipping date:Next working day*

Part Number:CE957A#B19

£266 VAT excl. (£319 VAT incl.)
  • Enjoy high productivity with great print speeds and professional-quality colour.

    • Boost productivity and save time with print speeds of up to 20 ppm A4.
    • Produce crisp, detailed text and consistently smooth colour with HP ImageREt 3600 and Original HP LaserJet toner cartridges.
    • Design and produce colour marketing materials in-house on a range of media sizes from 8.9 x 12.7 cm (3.5 x 5 inches) to 21.6 x 35.6 cm (8.5 x 14 inches). Go to www.hp.com/create for tips and templates from HP.
    • Print documents affordably: get the same black cost per page as a black-and-white HP LaserJet printer[4].
  • Manage networked resources using convenient, intuitive setup and easy-to-use management features.

    • Install and proactively manage this printer remotely using HP Web Jetadmin.
    • Get started right away with HP Smart Install – no CD required[5].
    • Use the printer anywhere in the office, with built-in wireless connectivity[1]. Share printing on a network with built-in 10/100 Ethernet.
    • Print from virtually anywhere with HP ePrint[3]. Print from a smartphone directly to your printer using HP wireless direct printing[6], and print wirelessly from your iPad®, iPhone®, and iPod touch® with AirPrint™[7].
  • Reduce your environmental impact.

    • Reduce energy use with HP Auto-On/Auto-Off Technology, which turns the printer on when you need it and off when you don't[8]. Save even more energy with Instant-on Technology[9].
    • Reduce waste and easily manage paper use with automatic two-sided printing[2].
    • Save money and print for longer with Original HP high capacity black cartridges[10], and easily reorder with HP SureSupply[11].
    • Take advantage of free, easy recycling – cartridges returned through HP Planet Partners are recycled responsibly[12].
  • [1] Wireless performance is dependent upon physical environment and distance from access point, and may be limited during active VPN connections. Built-in wireless is available on the HP LaserJet Pro 400 Color M451nw and M451dw only.
  • [2] Automatic two-sided printing is available on the HP LaserJet Pro 400 M451dn and M451dw only.
  • [3] Requires an Internet connection to the printer. Feature works with any Internet- and email-capable device. Print times may vary. For a list of supported documents and image types, see http://www.hp.com/go/eprintcenter.
  • [4] Compared with HP LaserJet Pro P1566/ P1606dn printer. Assuming customer is printing at least 30% of total pages in colour with content similar to the colour ISO/IEC 19798 test suite (http://www.iso.org/jtc1/sc28) and overall average job length of three pages. Yields established using ISO/IEC test standards. Actual yields and costs vary considerably depending on images printed, number of colour pages printed, and other factors.
  • [5] HP Smart Install works with Windows only.
  • [6] Mobile device must be wireless-enabled and within wireless range of the printer. Printer must be HP ePrint-enabled and may require a firmware upgrade. Feature may require the download of driver or apps to mobile device, available at http://www.hp.com/go/eprintcenter.
  • [7] Supports iOS 4.2 devices (iPad, iPhone 4, iPhone 3GS, and 3rd and 4th generation iPod touch) that support multitasking. Works with HP ePrint-enabled printers and all-in-ones. AirPrint and iOS 4.2 devices require an 802.11 wireless network connection to the printer. Wireless performance is dependent upon physical environment and distance from the access point. AirPrint and the AirPrint Logo are trademarks of Apple Inc. iPad, iPhone, and iPod touch are trademarks of Apple Inc., registered in the U.S. and other countries.
  • [8] HP Auto-On/Auto-Off capabilities subject to printer and settings.
  • [9] Compared with traditional fusing.
  • [10] HP LaserJet CE410X Black Toner Cartridge not included; please purchase separately.
  • [11] Programme features and availability may vary by country. For more information, visit http://www.hp.com/learn/suresupply.
  • [12] Programme availability varies. HP print cartridge return and recycling is currently available in more than 50 countries and territories around the world through the HP Planet Partners programme. For more information, or to request return envelopes and bulk collection boxes, visit http://www.hp.com/recycle.

Technical details

HP LaserJet Pro 400 colour Printer M451dn-/+

Supported Operating Systems
Compatible operating systems
  • Full software installs supported on: Windows 8, 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: Windows Server 2008 (32-bit and 64-bit), Windows Server 2003 (32-bit) (SP3 or higher)
    Mac OS X v10.5, v10.6
    Linpus Linux (9.4, 9.5), Red Hat Enterprise Linux 5.0 (supported with a pre-built package), SuSE Linux (10.3, 11.0, 11, 11.1, 11.2), Fedora (9, 9.0, 10, 10.0, 11.0, 11, 12, 12.0), Ubuntu (8.04, 8.04.1, 8.04.2, 8.10, 9.04, 9.10, 10.04), Debian (5.0, 5.0.1, 5.0.2, 5.0.3) (supported by the automatic installer)
    HPUX 11 and Solaris 8/9
Advanced Features
Printer smart software features
  • HP ePrint, Apple AirPrint™, HP Smart Install, HP Auto-On/Auto-Off Technology, Automatic two-sided printing
Processor speed
  • 600 MHz
Printer Specifications
Automatic paper sensor
  • No
Duplex printing
  • Automatic (standard)
Duty cycle (monthly, A4)
  • Up to 40,000 pages
Recommended monthly page volume
  • 750 to 2000
Recommended monthly page volume note
  • HP recommends that the number of printed pages per month be within the stated range for optimum device performance, based on factors including supplies replacement intervals and device life over an extended warranty period.
Duty cycle note
  • Duty cycle is defined as the maximum number of pages per month of imaged output. This value provides a comparison of product robustness in relation to other HP LaserJet or HP Color LaserJet devices, and enables appropriate deployment of printers and MFPs to satisfy the demands of connected individuals or groups.
Envelope feeder
  • No
Hard disk
  • None
Paper trays, maximum
  • 3
Paper trays, standard
  • 2
Print colours
  • Yes
Print languages
  • HP PCL 5c, HP PCL 6, HP Postscript Level 3 emulation
Printer management
  • Windows®: HP Device Toolbox (default install), SNP Alerts (minimum network install), HP Web Jetadmin (download)
    Mac: HP Utility
Print technology
  • Laser
SureSupply note
  • HP SureSupply alerts you when your print cartridge is running low and helps you purchase online or locally through HP or a participating retailer. Only available with Original HP supplies
    Internet access required. To learn more, visit http://www.hp.com/go/SureSupply.
SureSupply supported
  • Yes
Fonts and typefaces
  • 84 scalable TrueType fonts
Printing Media Handling
Maximum input capacity (sheets)
  • Up to 550 sheets (with optional 250-sheet tray)
Input capacity
  • Up to 300 sheets
Standard input capacity (envelopes)
  • Up to 10 envelopes
Finished output handling
  • Sheetfed
Media type and capacity, tray 1
  • sheets: 50
    transparencies: 50
    envelopes: 10
Media type and capacity, tray 2
  • sheets: 250
    envelopes: 10
Media type and capacity, tray 3
  • sheets: 250
    envelopes: 10 (optional 250-sheet tray)
Maximum output capacity (sheets)
  • Up to 150 sheets
Output capacity
  • Up to 150 sheets
Standard output capacity (envelopes)
  • Up to 20 envelopes
Standard output capacity (transparencies)
  • Up to 50 sheets
Paper handling input, optional
  • Optional 250-sheet tray
Paper handling input, standard
  • 50-sheet multipurpose tray, 250-sheet input tray
Paper handling output, standard
  • 150-sheet output bin
Supported Printing Media
Recommended media weight (duplex)
  • 60 to 163 g/m²
Media sizes, custom
  • Tray 1: 76 x 127 to 216 x 356 mm
    Tray 2, optional Tray 3: 100 x 148 to 216 x 356 mm
Standard media sizes (duplex)
  • A4, B5
Media sizes supported
  • Tray 1, Tray 2, optional Tray 3: A4, A5, A6, B5 (JIS), 10 x 15 cm, postcards (JIS single, JIS double), envelopes (ISO DL, ISO C5, ISO B5)
Media size, tray 1
  • A4, A5, A6, B5 (JIS), 10 x 15 cm, postcards (JIS single, JIS double)
    envelopes (ISO DL, ISO C5, ISO B5)
    76 x 127 to 216 x 356 mm
Media size, tray 2
  • A4, A5, A6, B5 (JIS), 10 x 15 cm, postcards (JIS single, JIS double)
    envelopes (ISO DL, ISO C5, ISO B5)
    100 x 148 to 216 x 356 mm
Media size, tray 3
  • A4, A5, A6, B5 (JIS), 10 x 15 cm, postcards (JIS single, JIS double)
    envelopes (ISO DL, ISO C5, ISO B5)
    100 x 148 to 216 x 356 mm
Media types
  • Paper (bond, brochure, coloured, glossy, letterhead, photo, plain, preprinted, prepunched, recycled, rough), postcards, transparencies, labels, envelopes
Media weight, supported
  • Tray 1: 60 to 176 g/m² (up to 220 g/m² with postcards and HP Color Laser glossy photo papers)
    Tray 2, optional Tray 3: 60 to 163 g/m² (up to 176 g/m² with postcards)
    Automatic duplexer: 60 to 163 g/m²
Media weight (tray 1)
  • 60 to 176 g/m² (up to 220 g/m² with postcards and HP Color Laser glossy photo papers)
Media weight (tray 2)
  • 60 to 163 g/m² (up to 176 g/m² with postcards)
Media weight (tray 3)
  • 60 to 163 g/m² (up to 176 g/m² with postcards)
Print Area
Bottom margin (A4)
  • 4.23 mm
Left margin (A4)
  • 4.23 mm
Right margin (A4)
  • 4.23 mm
Top margin (A4)
  • 4.23 mm
Print Resolution
Print quality black (best)
  • Up to 600 x 600 dpi
Print quality black (normal)
  • Up to 600 x 600 dpi
Print quality color (best)
  • Up to 600 x 600 dpi
Resolution technology
  • HP ImageREt 3600
Print Speed
Print speed duplex (A4)
  • Up to 10 ipm
Print speed black (normal, A4)
  • Up to 20 ppm
Print speed colour (normal, A4)
  • Up to 20 ppm
Print speed footnote
  • Measured using ISO/IEC 24734, excludes first set of test documents. For more information see http://www.hp.com/go/printerclaims. Exact speed varies depending on the system configuration, software application, driver, and document complexity.
Print Time
First page out black (A4, ready)
  • As fast as 17 sec
First page out color (A4, ready)
  • As fast as 17 sec
First page out footnote
  • Exact speed varies depending on the system configuration, software application, driver and document complexity.
Cartridges and Printheads
Number of print cartridges
  • 4 (1 each black, cyan, magenta, yellow)
Memory, standard
  • 128 MB
Memory slots
  • 1 DIMM slot
Memory, maximum
  • 384 MB
Memory upgrade
  • Expandable to 384 MB through 1 industry-standard DIMM slot
Display Specifications
  • 2-line LCD (text)
Connectivity and Communications
Mobile printing capability
  • HP ePrint, Apple AirPrint™
Connectivity, standard
  • 1 Hi-Speed USB 2.0
    1 Fast Ethernet 10/100Base-TX
HP ePrint capability
  • Yes
Network protocols, supported
  • Via built-in networking solution: TCP/IP, IPv4, IPv6
    Print: TCP-IP port 9100 Direct Mode, LPD (raw queue support only), Web Services Printing
    Discovery: SLP, Bonjour, Web Services Discovery
    IP Config: IPv4 (BootP, DHCP, AutoIP, Manual), IPv6 (Stateless), IPP Print, SSL Security and Certificate management, Apple AirPrint™
Network ready
  • Standard (built-in Fast Ethernet)
Network capabilities
  • Via built-in 10/100 Fast Ethernet
Wireless capability
  • No
Battery and Power
  • Input voltage: 220 to 240 VAC (+/- 10%), 50 Hz (+/- 3 Hz)
Power supply type
  • Built-in power supply
Power consumption
  • 425 watts (active), 15.2 watts (ready), 4.0 watts (sleep), 0.5 watts (manual-off). Typical Electricity Consumption (TEC): 1.509 kWh/Week
Power consumption (active)
  • 425 watts
Power consumption footnote
  • Power requirements are based on the country/region where the printer is sold. Do not convert operating voltages. This will damage the printer and void the product warranty.
Power consumption (manual-off)
  • 0.5 watts
Power consumption (sleep)
  • 4.0 watts
Rack and Power Specifications
Typical electricity consumption (TEC) number
  • 1.509 kWh/Week
  • 23.64 kg
System Requirements
Minimum system requirements for Macintosh
  • Mac OSX v10.5, v10.6
    PowerPC G4, G5, or Intel® Core™ Processor
    500 MB hard disk
    CD-ROM/DVD-ROM or Internet
    USB or Network port
Minimum system requirements
  • Windows 8, Windows 7 (32-bit/64-bit), Windows Vista (32-bit/64-bit): 1 GHz 32-bit (x86) or 64-bit (x64) processor, 1 GB RAM (32-bit) or 2 GB RAM (64-bit), 400 MB free hard disk space, CD/DVD-ROM or Internet, USB or Network port
    Windows XP (32-bit) SP2: Pentium® 233 MHz processor, 512 MB RAM, 400 MB free hard disk space, CD/DVD-ROM or Internet, USB or Network port
Security Management
Security management
  • Embedded Web Server: password-protection, secure browsing via SSL/TLS
    Network: enable/disable network ports and features, SNMPv1 community password change
    HP ePrint: HTTPS with certificate validation, HTTP Basic Access Authentication, SASL authentication
Software and Applications
Software included
  • Windows®: HP Installer/Uninstaller, HP PCL 6 print driver, Status Alerts, HP Update, DXP
    Mac: HP Installer/Uninstaller, HP Postscript driver, HP Setup Assistant, HP Utility, HP Alerts, HP Firmware Updater
Driver updates
  • Latest supported operating systems and print drivers available at http://www.hp.com/go/support
What's in the box
  • HP LaserJet Pro 400 color M451dn 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
Minimum dimensions (W x D x H)
  • 405 x 484 x 322 mm
System Components
Control panel
  • 2-line, 16-character backlit LCD display
    5 buttons (Cancel job, Left arrow, Right arrow, Select, Back)
    2 LED lights (Attention, Ready)
  • One-year limited warranty. Warranty and support options vary by product, country and local legal requirements.
CE Declaration LaserJet Pro 300 400 M351a M451dn BOISB-1002-00 (43KB)


Overall rating

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Jaz999 1 month, 2 weeks ago - 09/06/2014 16:16

Gender :: MaleAge :: 25-39Computer proficiency :: Intermediate

Excellent printer

This printer is great. I have used ink jets and they break all the time. Laser jet is the way to go Especially if you run your own business.






Creekside1 1 month, 2 weeks ago - 08/06/2014 17:00

Gender :: MaleAge :: 55+Computer proficiency :: Advanced

Does Exactly What I Wanted

I researched a bunch to discover a printer for not only basic needs but one that could print on my 7 x 10 note card stock quickly and without misfeeds. Even on heavy stock the printer was excellent, it paused once in a while to cool down but printed one after another quickly. I am impressed! It runs quiet too. Wish I had invested in this a long time ago. The Smart Install didn't take but got it installed first try with the disc provided. Thank you HP your machine saved the day.






FineGames 3 months, 1 week ago - 15/04/2014 18:09

Gender :: MaleAge :: 55+Computer proficiency :: Advanced

A Great, Color Workhorse Nearing End of Its Life

This was my second purchase of this printer. My first was may a year earlier and is functioning well right beside this new printer. My needs suggested a second, color printer with duplexing, and I had no qualms about getting a second of these HP451dn's. I've liked my experience with the first during the prior year. It seems to be conservative with toner use, tho there are 4 toner cartridges to maintain. Replace them all with HP toner & you've paid more than the price of the printer. But I use color very selectively, so the trail color cartridges that came with my first HP451 are all still in use 15 months later. The downsides of this printer is that (1) it allows 256mb add-on memory to flush out its memory to 384mb; the major manufacturers as well as HP no longer offer this module so you have to scrounge for it at relatively high prices; (2) the printer is not the fastest printer by any means; (3) HP's documentation quality is bifurcated: either VERY detailed & sophisticated, or sorely lacking. You'll have to scratch around if you have any need for the PCL commands.






Woody75 4 months ago - 27/03/2014 05:08

Gender :: FemaleAge :: 55+Computer proficiency :: Intermediate

Love it every bit as much as my old HP.

I am particularly happy with the two-sided printing which I expect to be using frequently. I never had that before and it is amazingly fast. The extra cost for that feature will be more than made up in the savings on paper and the speed with which it produces the finished product.






Barb195 4 months, 1 week ago - 21/03/2014 08:30

Gender :: FemaleAge :: 55+Computer proficiency :: Advanced

Excellent Color Laser

This product replaced the same model which had heavy use but finally gave out. The old model was about 6 years old. One complaint for the new model is when I put the HP 305A black ink cartridge from the old model into the new one, it would not authenticate. All the other colors from the old were put into the new and they authenticated. Second complaint is the new model is taking a long time to print once I click on print from my computer. It also stops during printing as if it's spooling again. This didn't happen with the old model until I stopped working.

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