Paper Thickness Calculator
The Paper Thickness Calculator allows you to convert thickness measurements between different units such as millimeters, microns, typographic points and inches. Essential for printing professionals, publishers, stationery stores and graphic industry who need to specify grammage, caliper and paper thickness. Includes references for common paper types, from tissue paper to cardstock, making it easier to choose the right material for printing, packaging and specific graphic projects.
Common Paper Types
Conversion Formulas
1 mm = 1000 Microns (μm)
1 mm = 2.835 Points (pt)
1 mm = 0.0394 Inches (in)
1 mm = 39.37 Mils (mil)
Paper Thickness Calculator: Convert and Understand Paper Measurements
The Paper Thickness Calculator is a practical tool designed to help you convert paper thickness between different units such as millimeters (mm), microns (μm), points (pt), inches (in), and mils (mil). Whether you're working in printing, publishing, graphic design, or simply choosing the right paper for a project, this tool offers accurate conversions and helpful references.
Why Use a Paper Thickness Calculator?
Understanding the thickness of paper is crucial for many applications:
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Printing professionals need accurate caliper values for machine compatibility.
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Publishers and designers require precise thickness for layout and binding.
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Stationery stores use thickness as a key selling point.
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Packaging teams rely on the correct material for durability and presentation.
Instead of manually converting units or guessing the type of paper you're dealing with, this calculator automates everything — saving time and avoiding mistakes.
What Units Can You Convert?
You can convert from millimeters to the following units:
| Unit | Description |
|---|---|
| Microns (μm) | Common in technical and ISO standards |
| Points (pt) | Typographic unit (1 pt ≈ 0.3528 mm) |
| Inches (in) | Widely used in the US printing market |
| Mils (mil) | Thousandths of an inch (1 mil = 0.001 in) |
Example:
A paper thickness of 0.1 mm equals:
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100 μm
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0.28 pt
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0.0039 in
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3.9 mil
Identify Common Paper Types by Thickness
The calculator also helps you understand what type of paper you're working with:
| Paper Type | Thickness (mm) | Thickness (μm) |
|---|---|---|
| Tissue Paper | 0.03 mm | 30 μm |
| Newsprint | 0.05 mm | 50 μm |
| Copy Paper 70gsm | 0.095 mm | 95 μm |
| Copy Paper 80gsm | 0.108 mm | 108 μm |
| Magazine Paper | 0.09 mm | 90 μm |
| Cardstock | 0.25 mm | 250 μm |
| Postcard | 0.35 mm | 350 μm |
So, if you enter a value of 0.100 mm, the calculator will classify it as Lightweight paper, similar to standard 70–75gsm printer sheets.
Conversion Formulas Used
To ensure accuracy, the calculator uses the following formulas:
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1 mm = 1000 μm
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1 mm = 2.835 pt
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1 mm = 0.0394 in
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1 mm = 39.37 mil
All calculations are automatically updated based on your input and selected unit.
Who Is This Tool For?
This calculator is ideal for:
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Graphic designers selecting the right stock for brochures or business cards
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Print shop operators calibrating machines
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Publishers comparing paper stock for covers and interiors
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Anyone needing quick, reliable thickness conversions