3 printer hacks every admin buyer should know (yes, including how to find the IP address)

The short version: stop guessing, start saving

If you manage office supplies for a team, here's what actually matters when you're dealing with an HP printer: knowing its IP address, using the right A4 paper, and running a quick percent-off calculation before you order toner. I've been doing this since 2020, handling about 60-80 orders a year across 8 vendors, and these three things have saved me the most time and headaches. Let me break down why — and what I wish someone had told me earlier.

Where's that IP address? (And why you'll waste an hour if you don't know)

Honestly, I'm not sure why HP makes finding the IP address slightly different on every model. My best guess is it's a legacy design thing. But here's the deal: if you need to set up network printing, update firmware from your browser, or troubleshoot an error 75, that IP address is your key. No IP? You're stuck walking to the printer with a USB stick.

For most HP LaserJets (like the Color LaserJet Enterprise MFP 5800dn) you can print a network configuration page from the control panel: Settings → Network → Print Network Configuration. That page lists the IP. Or try Wi-Fi Direct if you're in a pinch. I once spent 45 minutes looking for an IP on an older OfficeJet because I skipped that step. Never again.

A4 paper isn't just paper (size, weight, and why it matters)

Look, I know paper is paper. But it's not. Standard A4 paper is 210 × 297 mm (industry standard, according to ISO 216). Most office copy paper is 80 gsm – about 21 lb bond. But if you're printing brochures or heavy graphics, you need 100 gsm or higher. I learned this the hard way when my department bought 70 gsm 'economy' paper. It was fine for text, but every color brochure came out see-through and flimsy.

Here's a quick reference I keep pinned on my desk (source: printing industry standards):

• 20 lb bond = 75 gsm (standard copy paper)
• 24 lb bond = 90 gsm (letterhead, premium)
• 80 lb text = 120 gsm (brochures)

For the HP Color LaserJet, I stick with 80–100 gsm. Thicker paper can cause jams if the machine isn't set for it. And always check the printer's manual – it'll list supported weights.

Percent-off calculator: the admin buyer's secret weapon

Every time HP runs a sale on toner (which happens at least once a quarter), you'll see a banner: "30% off original price." Great – but what's the actual cost? The math: Discounted Price = Original Price × (1 – Discount %). So a $100 toner at 30% off is $100 × 0.70 = $70. Simple, right? But when you're juggling 60 orders a year and multiple suppliers, you can't do that in your head for every line item.

I use a simple online percent-off calculator (there are free ones) or just open the calculator app on my phone. Once I was comparing two vendors: one offered 15% off a $120 toner, the other 10% off a $110 toner. 15% off $120 = $102; 10% off $110 = $99. The second one was cheaper despite a lower discount. Saved $3 per unit × 20 units = $60. Not huge, but it adds up.

My rule: never buy office supplies without running the numbers first. Because vendors love to use 'percent off' to hide the real price comparison.

Boundary conditions – when these tips don't work

Not everything fits every situation.

• IP addresses – Some HP printers use Bonjour or mDNS, so the IP might change if your network uses dynamic DHCP. If you're in a static environment, it's reliable. For a home office or small team with a simple setup, the IP is usually stable.
• Paper – If you're printing on coated or specialty stock, stick with brand recommendations. And always test a few sheets before buying a full case.
• Discount calculator – Works for any purchase, but remember some vendors add shipping or handling fees that aren't included in the percentage off. Always verify the total.

I'd rather admit these limits upfront than pretend everything is one-size-fits-all. That's the honest side of admin buying.