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Acres to Square Feet Converter

Convert parcel sizes between acres and square feet, with quick metric references.

Formula shown0 inputs definedUpdated Nov 2025By CalcuTotal TeamFree, no sign-up

Quick Summary

Use this when you need:

Verify zoning or permitting forms that demand square footage while deeds list acres
Compare real-estate flyers that mix acres with square-foot pricing
Calculate lot coverage or FAR when raw land is quoted in acres

You’ll get:Area

How this is calculated

Formula:

area_target = area_source

In plain language:

Areas are normalized to square meters, then converted into acres or square feet using 1 acre = 43,560 square feet.

The formula is always visible so you can verify the math and explain your numbers to anyone who asks.

What these terms mean

Area

Area used in the calculation.

When to use this calculator

Verify zoning or permitting forms that demand square footage while deeds list acres
Compare real-estate flyers that mix acres with square-foot pricing
Calculate lot coverage or FAR when raw land is quoted in acres

Last updated: November 21, 2025

Acres to square feet converter explained

Many zoning forms want square feet while deeds and listings stay in acres. This calculator bridges both, keeping hectares and square metres handy so you can share the number that matches your audience.

How the conversion works

One international acre equals exactly $43{,}560\,\text{ft}^2$ and $4{,}046.8564224\,\text{m}^2$ . The converter runs everything through square metres, then applies the factors:

A_{\text{ft}^2} = A_{\text{ac}} \times 43{,}560

A_{\text{ac}} = \frac{A_{\text{ft}^2}}{43{,}560}

US survey acres use $43{,}560.097$ ft²; the tool includes that option when you need survey-grade parity.

Units and conversions

Unit	Symbol	Relation to base
Acre (international)	ac	$1\,\text{ac} = 43{,}560\,\text{ft}^2 = 4{,}046.8564224\,\text{m}^2$
Acre (US survey)	ac (US)	$1\,\text{ac}_{US} = 43{,}560.097\,\text{ft}^2$
Square foot	ft²	$1\,\text{ft}^2 = 0.09290304\,\text{m}^2$
Square metre	m²	base unit
Square yard	yd²	$1\,\text{yd}^2 = 9\,\text{ft}^2$

Worked examples

Lot size in acres → square feet
Given $0.85\,\text{ac}$ :
$A_{\text{ft}^2} = 0.85 \times 43{,}560 \approx 37{,}026\,\text{ft}^2$
Result: 37,026 ft².
Site plan in square feet → acres
Given $18{,}000\,\text{ft}^2$ :
$A_{\text{ac}} = \frac{18{,}000}{43{,}560} \approx 0.4132\,\text{ac}$
Result: 0.413 ac.

Tips and pitfalls

Confirm whether your appraisal or survey expects international or US survey acres; pick the matching unit to avoid tiny deltas in closing docs.
Keep four to five significant digits when converting back to acres so per-acre pricing stays accurate.
For coverage or FAR checks, compute area in square metres first, then convert; it reduces rounding drift across codes that cite SI.
If you see “gross” vs “net” acreage, convert both separately before subtracting easements or setbacks.

References and further reading

Frequently Asked Questions

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Calculator info

Version:: v1.0.0
Last reviewed:: Nov 21, 2025
Sensitivity:: low
References:: 1

Last updated: November 21, 2025

Acres to square feet converter explained

How the conversion works

One international acre equals exactly $43{,}560\,\text{ft}^2$ and $4{,}046.8564224\,\text{m}^2$ . The converter runs everything through square metres, then applies the factors:

A_{\text{ft}^2} = A_{\text{ac}} \times 43{,}560

A_{\text{ac}} = \frac{A_{\text{ft}^2}}{43{,}560}

US survey acres use $43{,}560.097$ ft²; the tool includes that option when you need survey-grade parity.

Units and conversions

Unit	Symbol	Relation to base
Acre (international)	ac	$1\,\text{ac} = 43{,}560\,\text{ft}^2 = 4{,}046.8564224\,\text{m}^2$
Acre (US survey)	ac (US)	$1\,\text{ac}_{US} = 43{,}560.097\,\text{ft}^2$
Square foot	ft²	$1\,\text{ft}^2 = 0.09290304\,\text{m}^2$
Square metre	m²	base unit
Square yard	yd²	$1\,\text{yd}^2 = 9\,\text{ft}^2$

Worked examples

Lot size in acres → square feet
Given $0.85\,\text{ac}$ :
$A_{\text{ft}^2} = 0.85 \times 43{,}560 \approx 37{,}026\,\text{ft}^2$
Result: 37,026 ft².
Site plan in square feet → acres
Given $18{,}000\,\text{ft}^2$ :
$A_{\text{ac}} = \frac{18{,}000}{43{,}560} \approx 0.4132\,\text{ac}$
Result: 0.413 ac.

Tips and pitfalls

Confirm whether your appraisal or survey expects international or US survey acres; pick the matching unit to avoid tiny deltas in closing docs.
Keep four to five significant digits when converting back to acres so per-acre pricing stays accurate.
For coverage or FAR checks, compute area in square metres first, then convert; it reduces rounding drift across codes that cite SI.
If you see “gross” vs “net” acreage, convert both separately before subtracting easements or setbacks.

Quick Summary

Calculator Tool

How this is calculated

What these terms mean

Area

When to use this calculator

Acres to square feet converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

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Gaj to Square Yard Converter

Hectares to Acres Converter

Was this calculator helpful?

Found an error?

Calculator info

Acres to square feet converter explained

How the conversion works

Units and conversions

Worked examples

Tips and pitfalls

References and further reading

Frequently Asked Questions

Related Calculators

Acreage Calculator

Acres to Hectares Converter

Area Converter

Cent to Square Meter Converter

Gaj to Square Yard Converter

Hectares to Acres Converter

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