The right paper weight for your office copier explained in plain gsm terms
Paper weight is measured in grams per square metre, abbreviated as gsm, and the number tells the copier how the paper will behave through the paper path. Office MFPs are designed to handle a specific weight range, with standard trays accepting one range and the bypass tray accepting a wider range. Loading paper outside the rated range produces jams, misfeeds, and gradual wear on the paper handling components. The chart below covers the practical weight ranges for office use, with notes on which weight suits which kind of office work.
Bible paper
Very thin, multi part forms only
Standard office
Default for most office printing
Premium office
Better feel, less show through
Cover stock
Reports, presentations, brochures
Card stock
Business cards, postcards, dividers
Standard office paper at 75 to 90 gsm
The default range for most office printing
Standard office copier paper sits between 75 and 90 gsm, with 80 gsm being the most common choice. Paper in this range feeds reliably through every paper tray on every office MFP, costs the least per sheet of any office grade, and delivers acceptable opacity for most internal documents.
- Suitable for daily printing, copies, internal reports, drafts
- Compatible with every tray on standard office MFPs
- Best price per ream, typically €3 to €5 per 500 sheets
- Some show through visible on double sided printing at 75 gsm
Premium office paper at 90 to 100 gsm
Better feel and reduced show through
Premium office paper sits between 90 and 100 gsm. The slightly heavier weight produces a more substantial feel, reduces show through on double sided printing, and supports a higher quality finished appearance for external documents. The cost increase over standard paper is modest, typically €1 to €2 per ream.
- Suitable for client facing documents, formal letters, mid quality presentations
- Compatible with every standard tray on most office MFPs
- Slightly better opacity, less show through on duplex prints
- Often available in brighter white shades for crisper appearance
Cover stock at 120 to 160 gsm
Reports, brochures, and presentation covers
Cover stock sits between 120 and 160 gsm and provides a noticeably heavier feel than standard office paper. The weight suits document covers, brochure pages, presentation handouts, and any application where the office wants the printed piece to feel substantial.
- Suitable for report covers, brochures, presentation handouts, certificates
- Requires bypass tray on most office MFPs, sometimes a dedicated tray on departmental devices
- Often available in matte and gloss finishes
- Slower print speed on most devices, typically 60 to 70 percent of standard paper rate
Card stock at 200 to 300 gsm
Business cards, postcards, and dividers
Card stock at 200 to 300 gsm sits at the upper end of what office MFPs handle reliably. The weight suits business cards, postcards, dividers, and tabs. Most office MFPs accept card stock only through the bypass tray and at significantly reduced print speed. Departmental and production devices handle the weight more comfortably than mid market or small office class.
- Suitable for business cards, postcards, divider tabs, heavy reply cards
- Bypass tray only on most office MFPs
- Typically 40 to 50 percent of standard print speed
- Some devices require selecting a specific paper type setting to engage the heavyweight handling profile
Weight versus device class compatibility
| Device class | Standard tray range | Bypass tray range | Maximum supported |
|---|---|---|---|
| SOHO desktop | 75 to 90 gsm | 75 to 120 gsm | 120 gsm |
| Small office MFP | 75 to 105 gsm | 60 to 200 gsm | 200 gsm |
| Mid market MFP | 60 to 120 gsm | 60 to 250 gsm | 250 gsm |
| Departmental MFP | 60 to 200 gsm | 60 to 300 gsm | 300 gsm |
| Production class | 60 to 250 gsm | 60 to 350 gsm | 350 gsm |
The economic case for matching weight to workflow
Choosing the right paper weight for each kind of work produces both quality and cost gains. Using 100 gsm premium paper for daily internal printing wastes money: the heavier weight costs 20 to 30 percent more per ream and the quality benefit is invisible on internal documents. Using 75 gsm cheap paper for client facing documents costs less but produces a thin disposable feel that undercuts the document's intent.
Most offices benefit from stocking two paper grades: a standard 80 gsm for daily use and a premium 100 gsm for client facing work. The 100 gsm goes through one tray dedicated to external documents, and the 80 gsm fills the other trays for everything else. The split keeps total paper spend close to the cost focused baseline while ensuring external documents look the part.
The weight to think about for double sided printing
Double sided printing places extra demands on paper. The sheet passes through the duplex unit, traverses the fuser twice, and shows whichever amount of toner is on the reverse side through the front. Paper at 75 gsm produces noticeable show through on duplex prints, while paper at 90 gsm or above produces much less.
For offices that print significant duplex volume, defaulting to 90 gsm rather than 80 gsm produces a meaningful quality improvement at modest cost. The improvement is most visible on documents with images or coloured backgrounds, where the show through interferes with the reverse side image. A 90 gsm paper handles these cases cleanly without needing to step up to premium grade.
What happens when paper weight is outside the rated range
Paper lighter than the device's minimum tends to produce multi feeds, since two thin sheets feel like one sheet to the separation roller. Paper heavier than the device's maximum tends to produce fuser jams, since the fuser cannot deliver enough heat to bond the toner cleanly to thick paper. Both failure modes degrade the device's components faster than usual, with the rollers wearing from the extra friction on heavy paper and the separation surfaces from the extra grip needed on light paper.
Offices that consistently print outside the rated range eventually accept either more frequent service calls or a step up to a device class that supports the desired weight. The economics usually favour the device upgrade for sustained volumes, while the bypass tray suits occasional jobs at unusual weights.
Continue with the paper cluster
This piece opens the paper cluster. The next pieces handle related paper topics: recycled paper compared with virgin paper, how to print on cardstock and cover stock, glossy paper versus matte paper, and why office humidity causes paper jams.