Feet to miles converter

A distance stated in feet may describe ceiling height, lumber or a route segment. Combine separate feet and inches into the correct total before using a single-value conversion. The unit here is the international foot; historical survey documents may use a different definition.

One foot is about 0.0001893939 miles. The international foot is defined as exactly 0.3048 m, which is 12 inches.

Multiply the number of feet by 0.0001893939. For example, 5280 ft × 0.0001893939 = 1 mi. To go the other way, divide by 0.0001893939.

Multiply by 0.00019. That is 0.3% high of the exact factor 0.0001893939, so 5280 ft comes out as 1.0032 mi instead of 1.

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “5280 ft to mi” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.