Paper Weight Calculator

Paper Weight Form

kg
m
cms

Results

GSM (Grams per square meter)

Table of Contents

1

What is Paper Weight?

Estimate paper basis weight from the mass and area of a reel.

2

How to Use This Calculator

  1. Enter or select Weight of reel, Length of paper, Reel width.
  2. Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
  3. Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
3

Formula Used

GSM = mass in grams/(length in meters × width in meters)
4

Variables Explained

InputWhat it means
Weight of reelMeasured mass in the chosen unit; pounds and kilograms are not numerically interchangeable.
Length of paperThe measured end-to-end distance of the section being calculated.
Reel widthThe crosswise measurement, perpendicular to the length.
5

Worked Example

A 10 kg reel, 100 m long and 1 m wide, contains 100 g/m² paper before core allowance.

6

Why Use This Calculator?

Use the result to put measurements on a common basis before comparing them or estimating quantities. The original measurement precision still limits the precision of the answer.

7

Common Mistakes

    • Exclude reel-core mass and convert width units before computing area.
8

Frequently Asked Questions

When should I round a measurement?

Carry the measured values and conversion factors through the calculation first. Round the final result to a precision justified by the original measurements.

Why can a supplier’s quantity differ?

Measurement conventions, nominal sizes, density assumptions and purchase rounding can change a practical quantity. Compare the units and assumptions before comparing the numbers.

9

Sources & References

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