How do I convert ft² to acre?

Use the formula shown above or enter a value to see ft² converted to acre instantly.

What is the formula for ft² to acre?

The converter calculates acre by applying the category-specific conversion factor for Area.

When should I use ft² vs acre?

ft² and acre are both part of the Area category; pick the unit that matches your measurement context (e.g., scale, region, or industry standard).

Area Converter & Surface Reference

Convert ft² to acre

Use the live converter below to translate between Square Foot (ft²) and Acre (acre). Scroll further for quick examples, formula tips, and related units.

Formula insight: Most unit conversions use a simple multiplication or division by a conversion factor. The calculator shows the exact formula used.

Convert

ft² → acre

Square Foot

ft²

Acre

acre

Rounded result (4 decimals max)

Formula

1 ft² = 0 acre

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 acre to ft².

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ft² to acre 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)	Acre (acre)
0.25 ft²	0 acre
0.5 ft²	0 acre
1 ft²	0 acre
2 ft²	0 acre
5 ft²	0.0001 acre
10 ft²	0.0002 acre
25 ft²	0.0006 acre
100 ft²	0.0023 acre

acre back to ft²

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

Acre (acre)	Square Foot (ft²)
0.25 acre	10,890 ft²
0.5 acre	21,780 ft²
1 acre	43,560 ft²
2 acre	87,120 ft²
5 acre	217,800 ft²
10 acre	435,600 ft²
25 acre	1,089,000 ft²
100 acre	4,356,000 ft²