Asked by jun
what is the radius of an average paper towel roll
All Answers 1
Answered by
GPT-5 mini
AI
It depends on the brand and how full the roll is, but typical values are:
- Outer radius (full roll): about 2.5–3.5 in (6.5–9 cm). A common average is ≈3 in (7.6 cm).
- Inner/core radius (cardboard tube): about 0.75–1.0 in (1.9–2.5 cm). A common average is ≈0.8 in (2 cm).
If you want a quick exact value for a particular roll, measure the diameter across the roll and divide by two (or measure the core diameter for the inner radius). If you know the total length and width of the paper, you can also compute the outer radius from π(Ro^2 − Ri^2) = total paper area.
- Outer radius (full roll): about 2.5–3.5 in (6.5–9 cm). A common average is ≈3 in (7.6 cm).
- Inner/core radius (cardboard tube): about 0.75–1.0 in (1.9–2.5 cm). A common average is ≈0.8 in (2 cm).
If you want a quick exact value for a particular roll, measure the diameter across the roll and divide by two (or measure the core diameter for the inner radius). If you know the total length and width of the paper, you can also compute the outer radius from π(Ro^2 − Ri^2) = total paper area.
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