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Length & distance

Just how long is 1 millimetre?

Up close

1 mm

Scale
1 millimetre

The quantity is exact as entered.

1 mmLength
0 - shared origin
Poppy seed

A poppy seed is an edible seed produced by plants in the poppy family and commonly used in breads and other foods.

1 mmLength
0 - shared origin

Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. Horizontal rulers compare the selected spans; vertical brackets also identify height on the artwork. A ruler represents the selected distance or a measurement not visible in this view.

A little perspective

1 millimetre is approximately equal to the length of a poppy seed.

Measurements, assumptions & sources +

1 millimetre

Length: 1 mm; definition.

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

Poppy seed

Length: 1 mm; example.

Example seed: 1 mm long and 0.5 mg. Not a botanical mean.

Defined examples — our methodology

The marked length is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

Compare 1 millimetre with the length of a poppy seed. The notes below explain how each value was chosen.

1 millimetre

1 mm

Length · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

Poppy seed

1 mm

Length · example

Example seed: 1 mm long and 0.5 mg. Not a botanical mean.

Comparing
Length ↔ Length
Relative size
1 millimetre is approximately equal to the length of a poppy seed.

How to read the visual

The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.

  • The length of a poppy seed: This is an illustrative comparison value, not a claim that every example is the same.

This comparison follows the selected length only; other dimensions may differ.

0.001 mmetres
0.0032808 ftfeet
6.2137 × 10⁻⁷ mimiles
6.6846 × 10⁻¹⁵ AUastronomical units

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