Decision tools built for clarity
Area Converter
Convert area values across metric, US customary, and Egyptian agricultural units.
Enter the required values, select the applicable options, and calculate.
Methodology
Formula or transformation
Normalizes area through square meters and applies the target-unit factor.
Variables
- Submitted area
- Source unit conversion factor
- Canonical area in square meters
- Target unit conversion factor
Units
- Square millimeter
- Square centimeter
- Square meter
- Square kilometer
- Square inch
- Square foot
- Square yard
- Acre
- Hectare
- Egyptian feddan
- Egyptian qirat
Rounding policy
The converted area is rounded half away from zero to twelve decimal places, and to twelve significant digits when it is below one.
Every supported unit is normalized through the square meter before conversion to the target unit.
Convert area values across metric, US customary, and Egyptian agricultural units.
Reviewed sources
- NIST — SI conversion factors: area, volume, and speed Reviewed on 2026-09-07
- Egyptian Environmental Affairs Agency — Egyptian land area units Reviewed on 2026-09-07
Formula review history
-
Initial formula and source review.
Reviewed 2026-09-07 for formula version nist-eg-area-conversion-v1
Assumptions
- Inputs are interpreted using the displayed units and options.
- The calculation follows the methodology and factors listed in the sources.
Limitations
- Display rounding can hide additional decimal places.
- The calculation cannot add accuracy that is absent from the submitted inputs.
Worked example
One Egyptian feddan equals 24 qirat or 4,200 square meters.
Frequently asked questions
How do the feddan and qirat convert?
One feddan is 24 qirat and 4,200 square metres. Every unit converts through the square metre with its published factor, so results agree in both directions.
Why does a result show many decimal places?
The conversion keeps the exact factor and rounds only for display, to twelve decimal places, and to twelve significant digits when the result is below one, so a very small quantity keeps its digits; a very small or very large quantity can therefore show a long decimal.