Paper Grammage (GSM) to US Basis Weight (lb Bond, Text & Cover) Converter

Convert paper GSM (g/m²) to US lb Bond, lb Text/Book, and lb Cover cardstock.

US Basis Weights (Bond / Text / Cover)
31.9 lb Bond / 81.1 lb Text
120 GSM = 31.9 lb Bond • 81.1 lb Text • 44.4 lb Cover
US Bond / Writing (17×22") 31.9 lb Bond
US Book / Text / Offset (25×38") 81.1 lb Text
US Cover Cardstock (20×26") 44.4 lb Cover
500 A4 Sheets Weight 3.74 kg (8.25 lbs)
Inputs
g/m² (GSM)
Metric paper density in grams per square meter (GSM / g/m²).
sheets
Number of A4 (210×297 mm) sheets to estimate ream weight.
Results & Graph
US Basis Weights (Bond / Text / Cover)
31.9 lb Bond / 81.1 lb Text
120 GSM = 31.9 lb Bond • 81.1 lb Text • 44.4 lb Cover
US Bond / Writing (17×22")
31.9 lb Bond
US Book / Text / Offset (25×38")
81.1 lb Text
US Cover Cardstock (20×26")
44.4 lb Cover
500 A4 Sheets Weight
3.74 kg (8.25 lbs)

US Basis Weights (Bond / Text / Cover) Sensitivity & Breakdown

120 GSM = 31.9 lb Bond • 81.1 lb Text • 44.4 lb Cover
Graph 1 • Paper Grammage Gsm Sensitivity Recalculates the domain equation across 50% to 150% of the primary input while holding other parameters constant.
0 44.4 lb Cover 25.9 44.4 lb Cover 51.7 44.4 lb Cover 50%: 16 44.4 lb Cover 16 50% 75%: 23.9 44.4 lb Cover 23.9 75% 100%: 31.9 44.4 lb Cover 31.9 100% 125%: 39.9 44.4 lb Cover 39.9 125% 150%: 47.9 44.4 lb Cover 47.9 150%
Graph 2 • Primary & Supporting Metric Comparison Compares the primary output alongside supporting domain benchmarks.
US Basis Weights (Bond / Text / Cover) 31.9 lb Bond / 81.1 lb Text US Bond / Writing (17×22") 31.9 lb Bond US Book / Text / Offset (25×38") 81.1 lb Text US Cover Cardstock (20×26") 44.4 lb Cover
Graph 3 • Exact Output Table & Units Displays each calculated output in its exact domain unit.
US Basis Weights (Bond / Text / Cover)31.9 lb Bond / 81.1 lb TextUS Bond / Writing (17×22")31.9 lb BondUS Book / Text / Offset (25×38")81.1 lb TextUS Cover Cardstock (20×26")44.4 lb Cover500 A4 Sheets Weight3.74 kg (8.25 lbs)
Summary: 120 g/m² (GSM) paper is equivalent to 31.9 lb Bond, 81.1 lb Text/Book, or 44.4 lb Cover stock.
Summary: 120 g/m² (GSM) paper is equivalent to 31.9 lb Bond, 81.1 lb Text/Book, or 44.4 lb Cover stock.
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US Basis Weights (Bond / Text / Cover) Reference Schedule

Metric GSMUS Bond (17×22")US Text (25×38")US Cover (20×26")
75 g/m²19.9 lb Bond50.7 lb Text27.7 lb Cover
90 g/m²23.9 lb Bond60.8 lb Text33.3 lb Cover
120 g/m²31.9 lb Bond81.1 lb Text44.4 lb Cover
170 g/m²45.2 lb Bond114.8 lb Text62.9 lb Cover
250 g/m²66.5 lb Bond168.9 lb Text92.4 lb Cover
300 g/m²79.8 lb Bond202.6 lb Text110.9 lb Cover

Formula & Mathematical Methodology: Paper GSM ↔ lb Bond/Cover Formula

lbBond = GSM / 3.7597
lbText = GSM / 1.4805
lbCover = GSM / 2.7048
lb_Bond = GSM / 3.7597; lb_Text = GSM / 1.4805; lb_Cover = GSM / 2.7048
  • Paper Grammage Gsm: Metric paper density in grams per square meter (GSM / g/m²).
  • Sheet Count Ream: Number of A4 (210×297 mm) sheets to estimate ream weight.

Rounding: Full IEEE-754 double precision internally; display values formatted to 2–4 significant figures.

Worked Example: Default Paper GSM ↔ lb Bond/Cover Scenario

Convert metric paper grammage (g/m² or GSM) into US Basis Weights across Bond/Writing (17×22"), Book/Text/Offset (25×38"), and Cover Cardstock (20×26") grades.

  1. Enter parameters for Paper GSM ↔ lb Bond/Cover in the input controls.
  2. Apply formula: lb_Bond = GSM / 3.7597; lb_Text = GSM / 1.4805; lb_Cover = GSM / 2.7048.
  3. Inspect the 3 interactive SVG charts and comparison table for sensitivity across input ranges.
Result: Produces instant Paper GSM ↔ lb Bond/Cover output with domain-verified units and sensitivity table.

Frequently Asked Questions

How is Paper GSM ↔ lb Bond/Cover calculated?

Paper Grammage (GSM) to US Basis Weight (lb Bond, Text & Cover) Converter uses the verified equation: lb_Bond = GSM / 3.7597; lb_Text = GSM / 1.4805; lb_Cover = GSM / 2.7048. Adjust any input field to recalculate all outputs and 3 SVG visualizations in real time.

What units does the Paper GSM ↔ lb Bond/Cover tool use?

Each field displays its exact unit label (g/m² (GSM), sheets) so results remain dimensionally consistent.

Can I solve backwards for a target output using Goal Seek?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any numeric input parameter.

Unit Conversions · Digital, Print & Design Units

Paper Grammage (GSM) to US Basis Weight (lb Bond, Text & Cover) Converter: inputs, method, and how to read the result

Convert paper GSM (g/m²) to US lb Bond, lb Text/Book, and lb Cover cardstock.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Paper Grammage Gsm: Metric paper density in grams per square meter (GSM / g/m²).
  • Sheet Count Ream: Number of A4 (210×297 mm) sheets to estimate ream weight.

What the calculation includes

With the default values shown, US Basis Weights (Bond / Text / Cover) is 31.9 lb Bond / 81.1 lb Text. The calculation follows Paper GSM ↔ lb Bond/Cover Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Paper Grammage Gsm from 120 g/m² (GSM) to 132 g/m² (GSM) changes US Basis Weights (Bond / Text / Cover) from 31.9 lb Bond / 81.1 lb Text to 35.1 lb Bond / 89.2 lb Text. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Inputs are within standard operating ranges for the specified equation.
  • Extreme boundary conditions may require specialized empirical adjustments.

Scope: Global Standard Check the assumptions and limitations against your situation before relying on the estimate.

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