Paper Weight (GSM) Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
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Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the paper's gsm and the sheet width and height in mm.
- Optionally set the number of sheets for the total.
How it works
Weight per sheet = gsm × area in m². A4 (210 × 297 mm) is about 0.0624 m², so 80 gsm ≈ 5 g.
Worked example
80 gsm A4. ≈ 5 g per sheet (about 2.5 kg per 500-sheet ream).
Common mistakes
- Mixing units — enter the sheet size in millimetres.
- Confusing gsm with 'pound' paper weights used in the US.
Frequently asked questions
What does gsm mean?
Grams per square metre — the weight of one square metre of the paper, regardless of sheet size.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.