Excel Formula: Convert Acres to Square Feet
- Acres
- 2.5 acres
- You entered
To convert acres to square feet in Excel, multiply the acre value by 43,560. Enter the number of acres in a cell (e.g., A1) and use the formula =A1*43560 to get the square footage.
Formula
The conversion is a simple multiplication:
Square feet = Acres × 43,560
- Acres – the land area you are converting (unit: acres).
- 43,560 – the exact number of square feet in one acre.
- Square feet – the resulting area (unit: sq ft).
The number 43,560 comes from the definition of an acre: it is 66 feet × 660 feet (one chain by one furlong). That product is exactly 43,560 square feet.
Worked Example
Using the calculator’s default of 2.5 acres:
- Start with the acre value: 2.5 acres.
- Multiply by 43,560:
2.5 × 43,560 = 108,900. - Result: 108,900 square feet.
So 2.5 acres equals 108,900 square feet. The calculator shows the same result because it uses the identical formula.
How to Write the Formula in Excel
There are several ways to write the conversion, depending on how you organize your data:
- Direct cell reference: If the acres are in cell A1, type
=A1*43560in the cell where you want the square feet. - Hardcoded value: For a one-off conversion, type
=2.5*43560directly. - Named range: Name cell A1 “Acres� (via Formulas → Define Name) and use
=Acres*43560– this makes the formula self-documenting. - Array formula (for multiple rows): If you have a list of acre values in A2:A10, enter
=A2:A10*43560as an array formula (Ctrl+Shift+Enter in older Excel; in Excel 365 it spills automatically).
You can also put the conversion factor in its own cell (e.g., B1 = 43560) and reference that cell with =A2*$B$1 – this makes it easy to update if you ever need a different unit.
Common Mistakes and How to Avoid Them
- Using 43,560 vs. 4,840: Remember that 1 acre = 4,840 square yards, not square feet. If you accidentally use 4,840, your result is off by a factor of 9 (since 1 square yard = 9 square feet).
- Mixing units: The formula assumes the input is in acres. If you enter a value that is actually square yards or hectares, the result will be nonsense. Always double-check the source unit.
- Rounding too early: If you round the acre value before multiplying, you lose precision. Keep the full precision in the acre cell and only round the final result if needed.
- Forgetting that the result is in square feet, not feet: Square feet is a measure of area, not length. A 100 ft × 100 ft lot is 10,000 sq ft, but its perimeter is 400 ft – they are different quantities.
When to Use This Conversion
Converting acres to square feet is common in real estate, land surveying, agriculture, and construction. For example:
- Listing a property’s size in square feet when the official deed says acres.
- Calculating the area of a plot for a building permit or zoning review.
- Estimating the cost of materials like sod or fertilizer that are sold per square foot.
- Comparing land prices when one listing uses acres and another uses square feet.
In many jurisdictions, property records list acreage, but building codes and material estimates often need square feet. This conversion bridges that gap.
Limitations and Alternatives
The formula is exact and has no limitations – 1 acre is defined as exactly 43,560 square feet. However, be aware of the following:
- Shape doesn’t matter: The conversion works regardless of the plot’s shape. Two acres is two acres whether it’s a long strip or a square.
- Survey accuracy: The input acre value itself may be approximate. If the acreage comes from a survey, it may have a small margin of error, but the conversion formula does not add any error.
- Other units: If you need square yards, multiply acres by 4,840. For square meters, multiply by 4,046.85642. For hectares, divide acres by 2.47105.
In Excel, you can also use the CONVERT function: =CONVERT(A1,"uk_ac","ft^2") for international acres, or =CONVERT(A1,"us_ac","ft^2") for US survey acres. Note that the difference between these two acre types is tiny (about 0.016 square feet per acre) and rarely matters outside precise surveying.
Frequently Asked Questions
How do I convert square feet back to acres?
Divide the square footage by 43,560. In Excel, if your square feet are in cell B1, use =B1/43560. For example, 108,900 sq ft ÷ 43,560 = 2.5 acres.
What is the formula for converting acres to square feet in Google Sheets?
It is the same as Excel: =A1*43560. Google Sheets uses the same arithmetic operators, so you can copy the formula directly.
Is an acre exactly 43,560 square feet?
Yes, by international agreement, the acre is defined as exactly 43,560 square feet. This is true for both the international acre and the US survey acre (the latter differs only in the definition of the foot, but the conversion factor remains 43,560).
How many acres is 10,000 square feet?
10,000 sq ft ÷ 43,560 = 0.229568 acres. That is roughly a quarter of an acre. To get this in Excel, use =10000/43560.
Can I convert acres to square feet without a calculator?
Yes, multiply the number of acres by 43,560. For a rough mental estimate, multiply by 44,000 and subtract 1% – that gives an approximation within about 1% of the exact value.