A Quick Guide to Measuring Circumference of Toilet Paper Roll


Your toilet paper roll might look plain, but there’s something cool to learn about it! This guide is all about how to measure the round part in the middle, the one that holds the paper. It might sound silly, but knowing how big it is can actually help you with some things around the house. We’ll show you how to measure it and why it might be useful in ways you never thought of!

Why Measure the Circumference of a Toilet Paper Roll Core?

You might be wondering why anyone would need to measure the circumference of toilet paper roll core. Believe it or not, there are several reasons this seemingly trivial information can come in handy:

Storage and Organization: Knowing the exact circumference of the toilet paper roll core allows for efficient storage solutions. By calculating the diameter (circumference divided by pi), you can determine the ideal box size or shelf space needed to store a specific number of rolls neatly. This is particularly helpful for bulk purchases or creating a designated toilet paper storage area.

DIY Projects and Crafts: The toilet paper roll core, thanks to its sturdy cardboard construction and perfect circular shape, is a popular material for DIY projects and crafts. Being armed with the exact circumference allows for precise planning and cutting when creating paper towel holders, gift wrap holders, or even decorative wall art.

Choosing the Right Toilet Paper Dispenser: Not all toilet paper dispensers are created equal. Some dispensers are designed for specific roll sizes, and knowing the circumference of your preferred toilet paper roll core ensures compatibility. Imagine the frustration of buying a new dispenser only to find your favorite brand’s rolls don’t fit!

Methods for Measuring

There are several simple and effective ways to measure the circumference of a toilet paper roll core. Here are three common methods:

Method 1: Using String and Ruler

  1. Grab a piece of string and wrap it snugly around the core of the toilet paper roll.
  2. Mark the spot on the string where it completes a full circle around the core.
  3. Carefully lay the marked string flat on a ruler.
  4. Read the measurement at the marked point on the string. This value represents the circumference of the toilet paper roll core.

Method 2: Using a Tape Measure

  1. Hold the tape measure flat against the core of the toilet paper roll.
  2. Wrap the tape measure completely around the core, ensuring it overlaps itself slightly at the starting point.
  3. Read the measurement on the tape where the two ends meet. This value represents the circumference of the toilet paper roll core.

Method 3: Using the Diameter (Optional)

If you happen to have the diameter of the toilet paper roll core readily available (perhaps from the product packaging), you can easily calculate the circumference using the formula:

Circumference = π (diameter)

where π (pi) is a mathematical constant with a value of approximately 3.14. Simply multiply the diameter by pi to find the circumference.

 Beyond the Basics

The circumference of a toilet paper roll core can be a gateway to some interesting facts about this everyday item:

Standardized Sizes: While there isn’t a single universal standard, most toilet paper roll cores in North America and Europe fall within a range of 4.4 cm (1.73 inches) to 4.8 cm (1.89 inches) in diameter. This translates to a circumference of roughly 13.8 cm (5.4 inches) to 15.1 cm (5.9 inches).

Environmental Impact: The cardboard core of a toilet paper roll is generally considered recyclable. However, some cores have a thin plastic film or a metal band around the edge, which might require separation before recycling. Knowing the circumference of the toilet paper roll core can help identify these variations and ensure proper recycling practices.

Innovation and Sustainability: Manufacturers are constantly looking for ways to reduce their environmental footprint. Some brands have explored cores made from recycled materials or even cores that are significantly smaller in diameter while maintaining the desired sheet count through thinner or higher-density paper. The circumference of the toilet paper roll core can be a valuable metric when comparing different brands’ commitment to sustainability. A smaller core size, achieved through responsible paper usage or innovative materials, can indicate a more eco-friendly product.

Arts and Crafts Potential: The consistent circumference of a toilet paper roll core makes it a versatile tool for creative projects. From building miniature dollhouse furniture to creating intricate paper flowers, the possibilities are endless. Knowing the exact circumference allows for precise cutting and construction, ensuring all your DIY creations have a uniform and aesthetically pleasing look.


Understanding the circumference of a toilet paper roll core might seem like an insignificant detail. However, as we’ve explored, this simple measurement can be surprisingly useful in various situations. From optimizing storage to crafting ingenious DIY projects, knowing the core’s size can add a touch of efficiency and creativity to our everyday lives. The next time you reach for a roll of toilet paper, take a moment to appreciate its design and the ingenuity behind its seemingly basic form.

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