Acreage Calculation Formula:
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The acreage calculation determines the area of land in acres from length and width measurements, adjusted by a construction factor that accounts for usable space after considering buildings, roads, and other structures.
The calculator uses the acreage formula:
Where:
Explanation: The equation first calculates square footage, converts to acres, then adjusts for construction factors that reduce usable land area.
Details: The construction factor accounts for the percentage of land actually available after accounting for buildings, roads, setbacks, and other infrastructure. Typical values range from 0.5 to 0.9 depending on development density.
Tips: Enter length and width in feet, and construction factor (default is 1.0 for raw land). For developed sites, use factors like 0.7 for suburban or 0.5 for urban areas.
Q1: Why use 43,560 in the formula?
A: 43,560 square feet equals one acre, the standard unit of land measurement in the US.
Q2: How do I determine the construction factor?
A: The factor is typically determined by site plans, with 1.0 being raw land and lower values for developed sites (e.g., 0.8 for single-family homes, 0.6 for commercial).
Q3: Can I use meters instead of feet?
A: The calculator uses feet. For meters, multiply by 10.764 to convert to square feet first.
Q4: What's the most accurate way to measure length/width?
A: For large parcels, use professional surveying equipment or GPS measurements rather than simple tape measures.
Q5: How does slope affect acreage calculations?
A: This calculator gives planimetric area. For sloped land, actual surface area is greater but typically not used for legal descriptions.