What Is This Tool?
This converter allows you to change measurements from atomic units of length, based on the Bohr radius, to the foot (US survey), a unit historically used in land surveying in the United States. It bridges the gap between atomic-scale distances and larger units used in geodesy and construction.
How to Use This Tool?
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Enter the value in atomic units of length (a.u., b) you wish to convert
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Select the target unit as foot (US survey) [ft]
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Click the convert button to get the equivalent measurement
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Review the result displayed in foot (US survey)
Key Features
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Converts atomic units of length (a.u., b) to foot (US survey) easily and quickly
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Supports scientific and surveying professionals working with different measurement scales
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Browser-based tool requiring no installation
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Provides exact conversion rate based on defined units
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Includes practical examples to guide usage
Examples
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1 a.u. of length equals approximately 1.7361423577609e-10 foot (US survey)
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5 a.u. of length convert to about 8.6807117888045e-10 foot (US survey)
Common Use Cases
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Reporting electron orbital sizes in atomic and molecular physics
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Specifying atomic geometries in quantum chemistry calculations
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Translating atomic-scale measurements into survey feet for engineering projects
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Linking quantum physical measurements with terrestrial spatial data used in geodesy
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Referencing property boundaries and cadastral surveys relying on US survey feet
Tips & Best Practices
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Ensure input values correspond to atomic units of length for accurate conversion
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Use this tool primarily for theoretical or computational contexts bridging atomic and surveying data
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Be mindful of the scale difference when comparing results
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Refer to exact unit definitions when interpreting converted values
Limitations
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The atomic unit of length is extremely small compared to the foot (US survey), making direct comparisons difficult
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Rounding errors may affect precision in conversions between atomic and macroscopic units
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This conversion is seldom used in everyday surveying due to scale disparities but is key in theoretical applications
Frequently Asked Questions
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What is the atomic unit of length?
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It is the Bohr radius, the characteristic length scale in atomic physics representing the mean electron–proton separation in a hydrogen atom.
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Why convert atomic units of length to foot (US survey)?
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To relate atomic-scale distances to practical units used in land surveying, mapping, and engineering in the United States.
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Is this conversion commonly used in everyday surveying?
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No, due to scale differences, it is primarily used in theoretical, computational, and research contexts linking atomic physics to geospatial data.
Key Terminology
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Atomic Unit of Length (a.u., b)
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A unit based on the Bohr radius representing atomic-scale distances in physics.
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Foot (US survey) [ft]
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A unit of length used historically in U.S. land surveying, defined exactly as 1200/3937 meters.
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Bohr Radius
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The characteristic length scale in atomic physics equal to the mean electron–proton separation in hydrogen.