Inputs
Example table (illustrative values)
| # | Paper type | GSM | Bulk (cm³/g) | Caliper (µm) | 100 sheets height (mm) |
|---|
Results
Single sheet:
– µm
– mm
– mil
Stack total:
– µm
– mm
– in
Formula used
Thickness per sheet (µm) = GSM × Bulk
• GSM in g/m²
• Bulk in cm³/g
Derivation:
thickness (cm) = (bulk × mass) / area
= (bulk × GSM) / 10,000
Convert to µm: × 10,000 → thickness (µm) = bulk × GSM
Stack thickness:
total (µm) = single (µm) × sheets × packing_factorFor known caliper, we skip the GSM × Bulk estimate and use the provided single‑sheet caliper.
How to use
- Select the calculation method.
- Enter GSM and Bulk or a known caliper per sheet with its unit.
- Set the number of sheets and optional compression factor.
- Click Calculate to see single‑sheet and stack results in multiple units.
- Use Download CSV or Download PDF to export.
FAQs
1) What is bulk?
Bulk is volume per gram (cm³/g). Higher bulk means thicker paper at the same GSM.
2) How accurate is GSM × Bulk?
It provides a good estimate. Actual caliper varies by manufacturer, finishing, moisture and measurement pressure.
3) How do I convert pages to sheets?
For duplex printing, sheets ≈ pages ÷ 2. For single‑sided, sheets = pages.
4) What is a typical office paper caliper?
Around 90–110 µm for 80 gsm uncoated office paper (bulk about 1.2–1.4).
5) What does the packing factor do?
It adjusts totals for compression. Use 1.00 for loose sheets; slightly lower values for wrapped reams or tightly bound stacks.