You are: Home > Area > Acres to Square Kilometres

Let's convert Acres (ac) to Square Kilometres (km²)

This quick and easy calculator will convert Acres (ac) to Square Kilometres (km²) and show formula, brief history on the units and quick maths for the conversion.

Enter Acres to convert to Square Kilometres

Result

Reset Form

Swap Units (km² → ac)

ac in Ares (a)

ac in Barns (b)

ac in Circular Mils (cmil)

ac in Hectares (ha)

ac in Roods (ro)

ac in Square Centimetres (cm²)

ac in Square Feet (ft²)

ac in Square Inches (in²)

ac in Square Metres (m²)

ac in Square Miles (mi²)

ac in Square Yards (ya²)

Quick Reference for Converting Acres to Square Kilometres

Formula

km² = ac / 247.11

Quick Rough Maths

To get the Square Kilometres, divide the number of Acres by 247.1

Acres (ac) in 1 Square Kilometre

There are 247.11 Acres in 1 Square Kilometre

Square Kilometres (km²) in 1 Acre

There are 0 Square Kilometres in 1 Acre

Unit Information

Acre
/ˈeɪkə/

Symbol: ac
Unit System: Imperial / US Customary

What is the Acre?

The acre is a unit of area and is used in the imperial and US customary systems with the symbol a.

It represents the area the size of one chain by one furlong (66 by 660 feet). This is exactly equal to 10 square chains, 1⁄640 of a square mile or 43,560 square feet.

It is generally used to measure the size of land.

Square Kilometre
/skwɛːˌˈkɪləˌmiːtə,kɪˈlɒmɪtə/

Symbol: km²
Unit System: SI

What is the Square Kilometre?

The square kilometre is a unit of area and is a multiple of the square metre; an SI derived unit. It has the symbol km².

A square kilometre is equal to the area of a square with edges 1km long. There are 1,000,000 square metres in a square kilometre.

Square kilometres are often used to describe expansive areas of land due to the large unit size.