Guide07 May 20262 min read

Folding a Piece of Paper 50 Times

A simple thought experiment that reveals how explosive exponential growth really is.

Pick up a sheet of A4 paper. It is around 0.1 mm thick. Now imagine folding it in half again and again, 50 times. The result would be about 112,589,990 km, roughly 75% of the way from Earth to the Sun.

The Formula

Thickness after n folds: T × 2^n, where T = 0.1 mm.

Watch the Growth

Fold 0
0.10 mm
Fold 5
3.20 mm
Fold 10
102.4 mm
Fold 17
10-storey building
13.1 m
Fold 20
Approaching Eiffel Tower height
104.9 m
Fold 27
Into the mesosphere
13.4 km
Fold 35
Heading toward the Moon
3436.0 km
Fold 42
Past the Moon
439804.7 km
Fold 50
Most of the way to the Sun
112.59 million km

Try It Yourself

50

Thickness after 50 folds

112.59 million km

Most of the way to the Sun

Milestones

  • Fold 1

    0.2 mm - Two sheets of paper

  • Fold 7

    12.8 mm - Thickness of a smartphone

  • Fold 10

    102 mm - Height of a coffee mug

  • Fold 17

    ~13 m - Roughly a 4-storey building

  • Fold 20

    ~105 m - About a football field length

  • Fold 23

    ~839 m - Close to Burj Khalifa height

  • Fold 42

    ~440,000 km - Past the Moon

  • Fold 50

    ~113M km - About 75% of the way to the Sun

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