SURFACE AREA WORKSPACE

Area Converter

Convert floor, land, and surface area across metric and customary units without manually squaring a length factor.

Reviewed reference factorsValues stay in this browser tabNon-negative surface areas; up to 12 decimal places.

Conversion input

Convert a measured surface area

Enter the complete area value, select its current unit, and choose the unit required for the estimate or report.

Find a unit10 / 10

Filter by unit name, symbol, or code. Your current selections remain available.

Known value0 / 80

Enter an area, not a side length. For a rectangle, calculate length x width first if you do not already know the area.

Convert from

Choose the unit attached to the value you entered.

Convert to

Choose the unit required for your report, estimate, or comparison.

Displayed precision

Choose the maximum decimal places shown. This does not increase source accuracy.

Conversion runs locally after the active reference catalogue loads.

Conversion result

Your checked conversion appears here

Enter a surface area to compare square metric units, square customary units, acres, and hectares.

What this tool delivers

Square-unit conversion without guesswork

Each square unit has its own reviewed square-metre factor, so the workspace does not ask you to transform a linear result.

What it converts

Converts complete area values between square millimetres, centimetres, metres, kilometres, feet, miles, acres, and hectares.

What you provide

One non-negative surface area and an unambiguous source unit, especially where land records use local conventions.

What you receive

One selected area, a complete equivalent table, the factor path, and a downloadable CSV for checking estimates.

Calculation method

How square-unit factors are applied

The entered area is multiplied by the source unit's square-metre factor and divided by the destination factor. Stored factors already account for squaring, so no extra squaring is applied.

Review the NIST area conversion factors

Quick answers

Area Converter questions

Should I enter length and width?

No. Enter the finished area. Multiply dimensions first when your source provides only side lengths.

Why is an acre not a round number of square metres?

An international acre is defined as exactly 4,046.8564224 square metres.

Can I use this for property documents?

Use it to check arithmetic only. A qualified survey and the governing record determine legal area.