1.5 metres
1.5 mLength · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Length & distance
Just how long is 1.5 metres?
Human scale
1.5 m
1.5 metres
The quantity is exact as entered.
1.5 mLength
0 - shared origin
Brain coral colony
A brain coral colony is a living mound-shaped formation of coral polyps that secrete a grooved, dome-like calcium carbonate skeleton.
1.5 mDefined colony diameter
0 - shared origin
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions. A ruler represents the selected distance or a measurement not visible in this view.
A little perspective
1.5 metres is approximately equal to the colony diameter of a brain coral colony.
Measurements, assumptions & sources +
1.5 metres
Length: 1.5 m; definition.
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Brain coral colony
Defined colony diameter: 1.5 m; defined specimen; range 60 cm–2 m.
A defined massive brain-coral colony 1.5 m across with a 900 kg wet skeletal mass. Species, growth form and cavities vary; the living grooved dome, not attached reef rock, defines the diameter.
Smithsonian Ocean — Corals and coral reefs
The marked defined colony diameter is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
Compare 1.5 metres with the colony diameter of a brain coral colony. The notes below explain how each value was chosen.
Brain coral colony
1.5 mDefined colony diameter · defined specimen · range 60 cm–2 m
A defined massive brain-coral colony 1.5 m across with a 900 kg wet skeletal mass. Species, growth form and cavities vary; the living grooved dome, not attached reef rock, defines the diameter.
- Comparing
- Length ↔ Defined colony diameter
- Relative size
- 1.5 metres is approximately equal to the colony diameter of a brain coral colony.
How to read the visual
The diagram uses the recorded measurements. Details outside the marked spans do not set the scale.
- We use 1.5 m for the colony diameter of a brain coral colony; the recorded range is 60 cm–2 m.
- The colony diameter of a brain coral colony: This is an illustrative comparison value, not a claim that every example is the same.
- The recorded ranges overlap, so the ordering can vary even though the central values differ.
This comparison follows the selected length only; other dimensions may differ.
4.9213 ftfeet
0.00093206 mimiles
1.0027 × 10⁻¹¹ AUastronomical units
1.5855 × 10⁻¹⁶ lylight-years
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