Meters to feet
Converts m to ft using exact unit definitions.
120 m is 393.70079 ft.
- Input
Provenance
- Computed by
- units.length.m-to-ft 1.0.0, core 0.1.0
- Model
- Exact unit definitions
- Accuracy
- Exact to double precision: each conversion is one correctly rounded ratio of exact definitions
- Notes
- None
- Cites
- National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811; National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, NIST Handbook 44; National Institute of Standards and Technology and National Oceanic and Atmospheric Administration, Deprecation of the United States (U.S.) Survey Foot, 84 FR 60101
Something look off?
How we got thisFormula, worked example, sources, and proof
Model: Exact unit definitions
Accuracy: Exact to double precision: each conversion is one correctly rounded ratio of exact definitions
Worked example: 120 m in ft. Source: Exact unit definitions (NIST SP 811 Appendix B). It is golden test vector v001, and every build checks the tool still gives its answer within its tolerance.
You enter
- Value
- 120 m
You get
- Converted
- 393.70079 ft
- Input
- 120 m
Review: Not yet independently reviewed by a metrologist.
Last verified: 2026-09-18, when a maintainer last confirmed this tool's sources at the issuer. See the sources ledger.
Status: version 1.0.0, core 0.1.0. See this tool in the verification report.
Checked against: 3 golden test vectors (download the test vectors, each with its source and tolerance). See how results are checked and every source.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, National Institute of Standards and Technology, 2008 edition. Appendix B.8, Factors for units listed alphabetically.
- Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, NIST Handbook 44, National Institute of Standards and Technology, 2026 edition. Appendix C, General Tables of Units of Measurement.
- Deprecation of the United States (U.S.) Survey Foot, 84 FR 60101, National Institute of Standards and Technology and National Oceanic and Atmospheric Administration, Federal Register notice, October 5, 2020 final (85 FR 62698). Effective January 1, 2023.