What is a paper core used for?

Paper cores are hollow cylindrical tubes made of wound paperboard used as a central support for winding rolls of material such as paper, fabric, plastic film, and aluminum foil in packaging, textile, film, and printing industries.

How do I calculate the price of a paper core per piece?

Price per piece = Weight (kg) × Rate per kg. First calculate the core weight using the formula, then multiply by your rate per kg. Our calculator does this automatically when you enter the rate field.

What is the standard density of a paper core?

The standard density of wound paperboard used in paper cores is approximately 730 kg/m³. This value is used in the weight calculation formula for accurate industry-standard results.

What are common paper core sizes?

Common paper core inner diameters are 25 mm (1 inch) for label rolls, 76 mm (3 inch) for tissue rolls, and 152 mm (6 inch) for industrial film rolls. Wall thickness typically ranges from 2 mm to 10 mm depending on the application.

Aug 7, 2025

Paper Core Weight Calculator – Free Online Tool (2026)

Paper Core Weight Calculator – Free Online Tool (2025)

Paper Core Weight Calculator

✅ Free Online Tool • Updated 2025

The Paper Core Weight Calculator is a free online tool that helps you instantly calculate the weight and cost of any paper core (paper tube). Simply enter the Length, Inner Diameter (ID), and Wall Thickness in millimeters and get accurate results in seconds.

Designed for professionals in the packaging, textile, film, foil, and paper roll manufacturing industries. Optionally enter the rate per kg (₹) to also calculate the price per piece automatically.

1. Length (mm)

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2. Inner Diameter (ID) (mm)

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3. Wall Thickness (mm)

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💰 Optional – Price Calculation

Rate per kg

₹

📐 Calculation Formula

Weight (kg) = 3.14 × (ID + Thickness) × (Length × Thickness × 730) ÷ 1,000,000,000

Where:
• ID        = Inner Diameter (mm)
• Thickness = Wall Thickness (mm)
• Length    = Core Length (mm)
• 730       = Paper board density (kg/m³)

Price per piece (₹) = Weight (kg) × Rate per kg (₹)

📋 About Paper Core Weight Calculator

A paper core (also known as a paper tube, fiber core, or cardboard core) is a hollow cylindrical tube manufactured by winding multiple layers of paperboard together. These cores provide structural support for winding various rolls of material across industries.

🏭 Industries That Use Paper Cores

📦 Paper & Packaging – Newsprint, kraft paper, tissue, and wrapping paper rolls
🧵 Textile Industry – Yarn, thread, and fabric winding
🎞️ Film & Foil – BOPP film, aluminum foil, stretch film, and cling wrap
🖨️ Printing Industry – Offset paper, coated stock, and label reels
🏗️ Construction – Carpet rolls, flooring material, and insulation wrap

🔢 How to Use This Calculator

Step 1 – Enter the Length of the paper core in mm (e.g., 1000 mm)
Step 2 – Enter the Inner Diameter (ID) in mm (e.g., 76 mm or 152 mm)
Step 3 – Enter the Wall Thickness in mm (e.g., 3 mm, 5 mm, or 7 mm)
Step 4 – (Optional) Enter the Rate per kg (₹) to calculate price per piece
Step 5 – Click "Calculate" to instantly see your results

📏 Common Paper Core Sizes

ID 25 mm (1 inch) – Label rolls, adhesive tape, and small packaging
ID 76 mm (3 inch) – Tissue rolls, paper towels, and household paper
ID 152 mm (6 inch) – Industrial paper, film rolls, and foil winding
Wall Thickness 2–10 mm – Light-duty to heavy-duty applications

✅ Key Benefits

✔️ 100% Free – No registration, no subscription, no hidden charges
✔️ Instant Results – Get accurate weight and price in one click
✔️ Mobile Friendly – Works on phones, tablets, and desktops
✔️ Accurate Formula – Uses the industry-standard paper density of 730 kg/m³
✔️ Price Calculator Built-in – Enter rate per kg to calculate cost per piece
✔️ No App Required – Works directly in any web browser

❓ Frequently Asked Questions

Q1. How do you calculate the weight of a paper core?

The weight is calculated using: Weight (kg) = 3.14 × (ID + Thickness) × (Length × Thickness × 730) / 1,000,000,000. All measurements must be in millimeters (mm). The constant 730 represents the standard paperboard density in kg/m³.

Q2. What is the density used for paper core weight calculation?

The standard density of wound paperboard is approximately 730 kg/m³. This industry-standard value is used in our formula to ensure accurate weight calculations across all paper core sizes.

Q3. What is the difference between a paper core and a paper tube?

Paper core and paper tube refer to the same product — a hollow cylindrical tube made from wound paperboard layers. They are also called cardboard cores, fiber cores, or mill cores depending on the industry and region.

Q4. How is the price per piece of a paper core calculated?

Price per piece = Weight (kg) × Rate per kg (₹). Our calculator first computes the core weight using the formula, then multiplies it by the rate you enter to automatically give the total cost per piece.

Q5. Does this calculator work on mobile devices?

Yes! This Paper Core Weight Calculator is fully responsive and mobile-friendly. It works on Android, iPhone, tablets, and desktop browsers — no app download or installation needed.

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