How do I convert in² to ha?

Use the formula shown above or enter a value to see in² converted to ha instantly.

What is the formula for in² to ha?

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

When should I use in² vs ha?

in² and ha 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 in² to ha

Use the live converter below to translate between Square Inch (in²) and Hectare (ha). 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

in² → ha

Square Inch

in²

Hectare

6.4516×10^-8

Rounded result (4 decimals max)

Formula

1 in² = 6.4516×10^-8 ha

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

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in² to ha 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 Inch (in²)	Hectare (ha)
0.25 in²	1.6129×10^-8 ha
0.5 in²	3.2258×10^-8 ha
1 in²	6.4516×10^-8 ha
2 in²	0 ha
5 in²	0 ha
10 in²	0 ha
25 in²	0 ha
100 in²	0 ha

ha back to in²

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

Hectare (ha)	Square Inch (in²)
0.25 ha	3,875,007.75 in²
0.5 ha	7,750,015.5 in²
1 ha	15,500,031.0001 in²
2 ha	31,000,062.0001 in²
5 ha	77,500,155.0003 in²
10 ha	155,000,310.0006 in²
25 ha	387,500,775.0016 in²
100 ha	1.55×10^9 in²