Area Converter

By Suraj GiriUpdated 24 September 2026

This page converts an area from one unit into another. Every value passes through the square metre, the SI unit area is held in, and area stays area: a unit only converts inside its own dimension.

How do you convert an area between square units?

Pick the unit you have, pick the unit you want, and type the value. The page multiplies by the factor between the two and prints the arithmetic under the result, so the answer and the working are the same object.

1. Choose the unit your value is in. This page opens on the hectare.
2. Choose the unit you want it in. This page opens on the acre.
3. Type the value, or the value with its units, such as 1 ha to acre. The result and the factor behind it appear together.
4. Read the working. It converts into the square metre first and out again, which is the same two lines you would write by hand.

Square metres, hectares and acres all measure area, so to convert units of length or volume instead, pick that quantity from the full list.

Area Conversion Table

One row per unit this page offers, each measured against the square metre. The last column says whether the factor is a definition or a reading of one.

Worked Examples

The question the bank ranked highest for this page, answered with the working.

Common Area Conversions

Each US customary or imperial unit on this page against the metric unit nearest it in size, both ways. Exact values print in full; the rest are rounded to 10 significant figures. Select one to load it into the converter.

• 1 in2 = 6.4516 cm2
• 1 cm2 = 0.15500031 in2
• 1 ft2 = 0.09290304 m2
• 1 m2 = 10.76391042 ft2
• 1 yd2 = 0.83612736 m2
• 1 m2 = 1.195990046 yd2
• 1 acre = 0.4046856422 ha
• 1 ha = 2.471053815 acre
• 1 mi2 = 2.58998811 km2
• 1 km2 = 0.3861021585 mi2

Where These Factors Come From

Every factor above is read from the knowledge base rather than typed for the page, and every result is worked from those factors. These are the statements it holds for area.

• One hectare is exactly 10 000 m2. One acre is 4840 square yards, which is exactly 4046.8564224 m2.
• When a unit is squared or cubed, its factor is squared or cubed with it. 1 m = 100 cm, so 1 m2 = 10 000 cm2 and 1 m3 = 1 000 000 cm3.
• An exact factor is a definition rather than a measurement. 1 in = 25.4 mm and 1 lb = 0.45359237 kg were fixed by the 1959 international yard and pound agreement, so they never gain another digit.
• How this page reports a result result in the target area unit; the length factor is squared before it is applied

SI prefixes on this page

Why Is the Area Factor Squared?

An area is a length multiplied by a length, so the factor between two area units is the length factor applied twice. That is why the step between square metres and square centimetres is so much larger than the step between metres and centimetres.

• Applying a length factor once to an area gives the wrong answer. The factor has to be squared, because an area has two sides.
• An acre is built from square yards and a hectare from square metres. They are separate units, not two names for one plot size.

The rule behind this factor is the same for every unit - why a squared unit needs a squared factor.

Frequently Asked Questions

Related Conversions

• Length sits in the same measurement group as area - convert a length between metres and feet.
• Volume sits in the same measurement group as area - volume in litres, cubic metres and gallons.
• If you are measuring pressure rather than area, convert a pressure between bar and psi instead.
• If you are measuring illuminance rather than area, convert illuminance between lux and foot-candles instead.
• If you are measuring volumetric flow rate rather than area, convert flow into cubic metres per hour instead.
• Angle sits in the same measurement group as area - convert an angle between degrees and gradians.

The rest of the family sits on the converter index for every quantity.