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Convert Nanometer to Barleycorn (nm to bc) instantly with accurate, readable results.
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Nanometer (nm) — SI unit equal to one billionth of a meter
Used for wavelengths of light, molecular structures, and semiconductor features where dimensions are far below the micrometer scale
- Symbol: nm
- System: SI derived unit
- Exact relations: 1 nm = 10⁻⁹ m = 0.001 µm = 10 Å
- Imperial/US equivalents: 1 nm ≈ 0.0000000393700787 in
- Typical examples: visible light ~400–700 nm; DNA double helix diameter ~2 nm; advanced transistor features on the order of single-digit nanometers
Barleycorn - traditional English length unit
Barleycorn is a historical unit of length in the Imperial/US systems, originally based on a grain of barley. Used today mainly as the step size in UK/Irish shoe sizing
- Symbol: none standardized (sometimes "bc")
- System: Imperial/US customary (historic)
- Exact relations: 1 barleycorn = 1/3 in (exact); 3 barleycorns = 1 in; 36 barleycorns = 1 ft
- Metric equivalents: 1 barleycorn = 25.4/3 mm ≈ 8.466666… mm ≈ 0.846666… cm
- Typical examples: consecutive UK shoe sizes differ by one barleycorn (≈ 1/3 in) in last length