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Calculate paper reel weight easily using GSM, width, length, reel diameter, core diameter, and density with our accurate Paper Reel Weight Calculator.
| Formula | Use When You Know | Notes |
|---|---|---|
| Weight = (GSM × Width × Length) ÷ 1000 | GSM, reel width, paper length | Most direct/accurate — uses actual paper area |
| Weight = π(D²−d²)×Width×Density ÷ 4 | Outside/core diameter, width, wound density | Estimate — depends on winding tightness |
A Paper Reel Weight Calculator helps you quickly find the weight of a paper reel or paper roll. You can calculate paper weight when you know the paper’s GSM, reel width, and length. You can also estimate reel weight from the outside diameter, core diameter, reel width, and paper density.
This calculator is useful for paper mills, printing businesses, packaging companies, kraft paper suppliers, and shipping calculations. It also helps when you need a quick paper reel weight calculation without doing the math by hand.
There are two main ways to calculate paper reel weight.
The main paper reel weight formula is:
Paper Reel Weight (kg) = GSM × Width (m) × Length (m) ÷ 1000
GSM means grams per square meter. First, multiply the reel width by its length to find the paper area. Then multiply the area by GSM and divide by 1,000 to convert grams to kilograms.
If your width or length is in inches, feet, centimeters, or millimeters, convert it to meters before using the formula.
When the paper length is unknown, you can estimate the weight from reel dimensions:
Paper Reel Weight (kg) = π × (D² − d²) × W × Density ÷ 4
Here, D is the outside reel diameter in meters, d is the core diameter in meters, W is the reel width in meters, and Density is the effective paper density in kg/m³.
This method treats the paper as the material between the outside diameter and the core. The result depends on the selected wound-paper density.
Choose the Length Method if you know GSM, reel width, and paper length.
Enter the GSM and select the correct GSM unit. You can also use basis weight in lb/1000 ft².
Enter the reel width and paper length. Select the correct unit, such as meters, centimeters, millimeters, inches, or feet.
If you do not know the paper length, choose the Diameter Method. Enter the outside diameter, core diameter, reel width, and paper density.
Select your required weight unit. The calculator gives the final result in kilograms, pounds, or metric tonnes.
Suppose a paper reel has an 80 GSM, a width of 1.2 meters, and a paper length of 5,000 meters.
First, calculate the paper area:
Area = 1.2 × 5,000 = 6,000 m²
Now calculate the paper weight:
Weight = 6,000 × 80 ÷ 1,000
Weight = 480 kg
So, the paper reel weighs approximately 480 kg.
The same formula works for a kraft paper reel weight calculator or a general paper roll weight calculator when GSM, width, and length are known.
A Paper Reel Weight Calculator makes paper weight calculations fast and simple. For the most direct result, use GSM, width, and length. If you only know the reel dimensions, use the diameter and density method.
The basic formula to remember is:
Paper Reel Weight (kg) = GSM × Width × Length ÷ 1000
This method is also useful for estimating paper roll weight, kraft paper weight, and paper production or shipping weight.
Use: Weight (kg) = GSM × Width (m) × Length (m) ÷ 1000.
If you know GSM, roll width, and roll length, multiply all three values and divide by 1,000.
The core formula is GSM × Width × Length ÷ 1000 when dimensions are in meters.
Yes. Use the diameter formula with outside diameter, core diameter, reel width, and effective paper density.
A ream usually contains 500 sheets. Its weight depends on sheet size and GSM. For example, the weight can be calculated from GSM × sheet area × 500 ÷ 1000.
No. This calculator is specifically designed for paper reel weight. Tape-and-reel packaging uses different measurements.
Yes. Kraft paper reel weight can be calculated using the same GSM, width, and length formula when the paper specifications are known.