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Metric area unit converter

Convert areas between the units of the metric system, from the square millimetre to the square myriametre. The square hectometre also appears as the hectare, the square decametre as the are and the square metre as the centiare.

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Square metre · centiare

10000 m² · ca

Equivalents

Square myriametre0.0001 mam²
Square kilometre0.01 km²
Square hectometre · hectare1 hm² · ha
Square decametre · are100 dam² · a
Square metre · centiare10000 m² · ca
Square decimetre1000000 dm²
Square centimetre100000000 cm²
Square millimetre10000000000 mm²

For area each step multiplies or divides by 100 (10 × 10):

  • 1 m² = 100 dm² = 10,000 cm² = 1,000,000 mm²
  • 1 dam² = 1 are (a) = 100 m²
  • 1 hm² = 1 hectare (ha) = 100 a = 10,000 m²
  • 1 km² = 100 ha; 1 mam² = 100 km²
  • 1 centiare (ca) = 1 m²

Use cases

  • Solving area unit exercises.
  • Converting a plot's size from hectares to square metres.
  • Comparing the area of plots, flats or land.

How it works

  1. 1

    Type the amount

    Decimals with a dot or a comma are accepted, as are negative values.

  2. 2

    Pick the units

    Choose the source and target units; the result and the equivalents table update instantly.

Technical details

  • Hectare, are and centiare are the land-measurement units used in land registries and farming.
  • Results use 10 significant figures; very large or very small values are shown in scientific notation (e.g. 1e-10).

Frequently asked questions

How many square metres are in a hectare?

10,000 m², the area of a square 100 m on each side.

Why does area jump by 100 at each step?

Because each unit is a square: if the side is 10 times larger, the area is 10 × 10 = 100 times larger.

Related tools

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