Use the acreage calculator when your starting inputs are the two sides of a rectangle. Use the area converter when you already have an area number and need another unit. A unit conversion does not determine a shape from an area number.
| Feature | Acreage calculator | Area converter |
|---|---|---|
| Inputs | Length, width, length unit, optional price per acre | Value, From unit, To unit |
| Input units | Feet, yards, meters, kilometers | m², km², ft², yd², mi², acres, hectares, in² |
| Operation | Convert sides to feet, multiply, divide by 43,560 | Multiply by source m² factor, divide by target m² factor |
| Primary | Acres, up to 4 fractional places | Chosen unit, up to 6 fractional places |
| Supporting results | ft², hectares, m²; entered-price total when price is positive | At most 4 units other than selected source and target |
The acreage default 300 ft × 200 ft is 60,000 ft². The primary displays 1.3774 acres; supporting results already include hectares. A price input of $12,000 per acre multiplies the calculated acreage by that entered number. This is arithmetic with a supplied price, not an appraisal.
For the area converter, 86.4 acres → hectares displays 34.964839 ha. The underlying dimensional factor used here is 43,560 × 0.3048² = 4,046.8564224 m² per acre, with 10,000 m² per hectare. The 0.3048 m foot is the international foot. This comparison does not reinterpret a record expressed in a different foot convention.
The acreage calculator’s hectares row makes a second tool unnecessary merely to obtain hectares. The area converter is useful for another supported target or for an area supplied independently of side lengths. Both trim trailing fractional zeros at their stated maxima; neither has a precision selector. Copy summarizes the supplied rectangle and acreage on the first form, and the entered and target area units on the second.
These operations use the supplied numbers only. Neither form derives parcel boundaries, slope-adjusted area or a legal land measurement.
Sources
- NIST SP 811, 2008 edition — Exact international-foot and yard definitions, and hectare of 10,000 square meters.
- NIST Handbook 44, 2026 edition — Acre relationship of 43,560 square feet only; no parcel measurement or legal interpretation.