Acreage Calculator

Enter nonnegative rectangular dimensions in one supported length unit. The calculator converts both sides to feet, multiplies them, and divides by 43,560 square feet per acre. The optional price is multiplied only after acreage is found.

Exact method

The international foot is exactly 0.3048 meter. Therefore the meter-to-foot factor is 1 ÷ 0.3048, and the kilometer-to-foot factor is 1,000 ÷ 0.3048. Yard inputs use exactly 3 feet per yard.

$\text{acres}=\frac{(\text{length}\times\text{feet per unit})(\text{width}\times\text{feet per unit})}{43{,}560}$

For the default 300 ft by 200 ft rectangle, 60,000 ÷ 43,560 = 1.377410468… acres, displayed as 1.3774 acres. One acre is 4,046.8564224 m², so the same area is about 5,574.18 m².

Limits

This is a rectangle calculation, not a boundary survey. Curves, slopes, easements, and deeded boundaries are not inferred. Inputs that would produce a result too large to represent are rejected. For a known area rather than side lengths, use the area converter.

Sources

• NIST, Guide for the Use of the International System of Units (SP 811) — SI units and accepted conversion guidance.
• NIST, Handbook 44, Appendix C — U.S. customary volume and length relationships used for dimensional arithmetic.