1 ounce
28.35 gMass · definition
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Mass
Just how heavy is 1 ounce?
In your hand
1 oz
0.02835 kgkilograms
0.0625 lbpounds
2.835 × 10⁻⁵ ttonnes
01
1 ounce28.35 gMass · definition
02
Sand dollar25 gDefined live mass · defined specimen · range 10 g–50 g
Bar length measures mass, not physical size.
A little perspective
The mass of 1 ounce is about 1.13 times the defined live mass of Sand dollar.
Measurements, assumptions & sources +
1 ounce
The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.
Sand dollar
A defined living sand dollar with an 8 cm test diameter and 25 g mass. Species and maturity vary; short spines are included visually but do not define the rigid test span.
Smithsonian Ocean — Sea urchins and sand dollars
The marked defined live mass is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
The visual compares mass with defined live mass. The records below preserve each value’s basis and caveats.
Sand dollar
25 gDefined live mass · defined specimen · range 10 g–50 g
A defined living sand dollar with an 8 cm test diameter and 25 g mass. Species and maturity vary; short spines are included visually but do not define the rigid test span.
- Comparing
- Mass ↔ Defined live mass
- Relative size
- 1 ounce is larger on this measurement by a factor of about 1.13. 1 ounce's selected measurement is approximately 13.4% greater than Sand dollar's.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Sand dollar uses a 25 g central value within a recorded range of 10 g–50 g.
- Sand dollar is labelled defined specimen; treat the displayed value as a comparison anchor rather than false precision.
- The recorded ranges overlap, so the ordering can vary even though the central values differ.
Change your perspective
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Choose a suggestion to redraw the comparison, or open its page to learn what it is.
A little smaller. A little larger.