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    Convert

    ft²mi²

    Square Foot
    ft²
    Square Mile
    3.58701×10^-8
    mi²
    Rounded result (4 decimals max)

    Formula

    1 ft² = 3.58701×10^-8 mi²

    Conversion sourcesTap or click to view references
    • The International System of Units (SI) — NIST Special Publication 330

      National Institute of Standards and Technology (NIST). The SI Brochure (SP 330) is the definitive English edition of the BIPM SI tables. NIST’s edition lists the official constants and conversion factors tying inch-pound units to SI, which SwapUnits applies for length, mass, temperature, pressure, volume, and related conversions. See /standards/nist-si-tenfold for the complete decimal multiple/submultiple table. View source · View SI table

    Results update as you type. Swap the direction to convert back from mi² to ft².

    ft² to mi² quick table

    Multiply any row by the same factor to scale results. Use the converter above to enter exact values with your own units.

    Square Foot (ft²)Square Mile (mi²)
    0.25 ft²8.96752×10^-9 mi²
    0.5 ft²1.7935×10^-8 mi²
    1 ft²3.58701×10^-8 mi²
    2 ft²7.17401×10^-8 mi²
    5 ft²0 mi²
    10 ft²0 mi²
    25 ft²0 mi²
    100 ft²0 mi²

    mi² back to ft²

    Keep the reciprocal handy when double-checking calculations or undoing a conversion.

    Square Mile (mi²)Square Foot (ft²)
    0.25 mi²6,969,600 ft²
    0.5 mi²13,939,200 ft²
    1 mi²27,878,400 ft²
    2 mi²55,756,800 ft²
    5 mi²139,392,000 ft²
    10 mi²278,784,000 ft²
    25 mi²696,960,000 ft²
    100 mi²2.78784×10^9 ft²

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