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Convert Picometer to Smoot (pm to smoot) instantly with accurate, readable results.
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Picometer (pm) — SI unit equal to one trillionth of a meter
Used to express atomic and subatomic dimensions such as bond lengths and ionic/atomic radii in chemistry and materials science
- Symbol: pm
- System: SI derived unit
- Exact relations: 1 pm = 10⁻¹² m = 0.001 nm = 10⁻⁶ µm = 0.01 Å = 1,000 fm
- Imperial/US equivalents: 1 pm ≈ 0.00000000003937007874 in
- Typical examples: covalent bond lengths ~100–200 pm; Bohr radius of hydrogen ~53 pm; atomic radii tens to a few hundred pm
Smoot - humorous nonstandard length unit
Smoot is a nonstandard, humorous unit of length equal to 5 ft 7 in, the height of Oliver R. Smoot (MIT ’62). Used to measure the Harvard Bridge in 1958 as “364.4 smoots ± 1 ear” and referenced in engineering culture and local markings
- Symbol: none standardized (sometimes sm or smt)
- System: Informal/non-SI
- Exact relations: 1 smoot = 5 ft 7 in = 67 in (exact)
- Metric equivalents: 1 smoot = 67 × 0.0254 m = 1.7018 m (exact)
- Typical examples: Harvard Bridge markings at 10-smoot intervals; humorous unit conversions in campus lore