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Square Millimeters to Ares Converter

Convert square millimeters (mm²) to ares (a), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an area, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
1 × 10⁻⁸ a
square miles
3.86102158542 × 10⁻¹³ sq mi
acres
2.47105381467 × 10⁻¹⁰ ac
square yards
1.1959900463 × 10⁻⁶ sq yd
square feet
1.07639104167 × 10⁻⁵ sq ft
square inches
0.00155000310001 sq in
square kilometers
1 × 10⁻¹² km²
hectares
1 × 10⁻¹⁰ ha
square meters
1 × 10⁻⁶ m²
square centimeters
0.01 cm²
square micrometers
1,000,000 µm²

1 mm² = 1 × 10⁻⁸ a

Show the working
  1. 1 mm² = 1e-8 a
  2. 1 × 1e-8 = 1e-8 a

How to convert square millimeters to ares

1 mm² = 1 × 10⁻⁸ a, so multiply by 1 to go from square millimeters to ares. Going the other way, 1 a = 100,000,000 mm².

a = mm² × 1
mm² = a × 100,000,000

Worked example:

1 mm² = 1e-8 a
5 × 1e-8 = 5e-8 a

Square Millimeters to ares table

Square MillimetersAres
1 mm²1 × 10⁻⁸ a
2 mm²2 × 10⁻⁸ a
3 mm²3 × 10⁻⁸ a
4 mm²4 × 10⁻⁸ a
5 mm²5 × 10⁻⁸ a
6 mm²6 × 10⁻⁸ a
7 mm²7 × 10⁻⁸ a
8 mm²8 × 10⁻⁸ a
9 mm²9 × 10⁻⁸ a
10 mm²1 × 10⁻⁷ a
15 mm²1.5 × 10⁻⁷ a
20 mm²2 × 10⁻⁷ a
25 mm²2.5 × 10⁻⁷ a
30 mm²3 × 10⁻⁷ a
40 mm²4 × 10⁻⁷ a
50 mm²5 × 10⁻⁷ a
75 mm²7.5 × 10⁻⁷ a
100 mm²1 × 10⁻⁶ a
250 mm²2.5 × 10⁻⁶ a
500 mm²5 × 10⁻⁶ a
1000 mm²1 × 10⁻⁵ a

About the units

Square Millimeters (mm²)
Square millimeters, a metric unit. Definition: BIPM SI Brochure (SI prefixes).

Formula version 0.1.0Reviewed