Convert Acre to Square Pole
Convert acres to square poles instantly. 1 acre = 160 square pole — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Pole to Acre converter for the reverse conversion.
Units explained
Acre
An acre is an imperial unit of area equal to exactly 4046.8564224 m². It is the most widely used non-metric unit for land area, particularly in the US, UK, and India.
Originally defined in medieval England as the area one yoke of oxen could plow in a day, approximately 40 perches by 4 perches. Standardized via the 1959 International Yard and Pound Agreement.
Acres are the standard land measurement unit in the US (real estate, agriculture), the UK (rural property), and widely used in India (alongside hectares and traditional regional units). 1 acre = 4840 sq yd = 43,560 sq ft = 0.4047 hectare.
Medieval English farming origin; modern exact value standardized in 1959.
Square Pole
A square pole is identical to a square rod, equal to approximately 25.293 m². 'Pole' is a regional name used in some US and British contexts.
Identical to square rod and square perch; differs only in regional naming preference.
Square poles appear in some historical US land records, particularly in mid-Atlantic states with strong English colonial heritage.
Standardized via the 1959 International Yard and Pound Agreement.
Acre to Square Pole conversion formula
The relationship between acres and square poles:
To convert acres to square poles, multiply the value in acres by 160. To reverse, multiply square poles by 0.00625.
How to use this converter
Type a value into the calculator. The result in square poles updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Pole to Acre converter for the reverse direction.
Step-by-step: convert acres to square poles
- Write down the value in acres (ac).
- Multiply that value by the factor 160.
- The product is the equivalent value in square poles (pole²).
- To reverse, multiply the square pole value by 0.00625.
Worked examples
Example 1 — Convert 1 ac to pole²:
1 × 160 = 160 pole²
Example 2 — Convert 100 ac to pole²:
100 × 160 = 16000 pole²
Real-world example — Maritime exclusion zone
A 200-acre exclusion zone (a common maritime boundary) converts to a different value in square poles that's useful when describing the same zone in everyday land-distance units.
200 ac × 160 = 32000 pole²
Real-world example — Coastal cruise distances
A 10-acre coastal sailing route converts to a different value in square poles — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 ac × 160 = 1600 pole²
Real-world example — Road-sign distances across systems
A 100-acre road sign converts cleanly into square poles — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 ac × 160 = 16000 pole²
Acre to Square Pole conversion table
Standard reference values for converting acres to square poles:
| Acre [ac] | Square Pole [pole²] |
|---|---|
| 0.01 | 1.6 |
| 0.1 | 16 |
| 1 | 160 |
| 2 | 320 |
| 3 | 480 |
| 4 | 640 |
| 5 | 800 |
| 10 | 1600 |
| 20 | 3200 |
| 30 | 4800 |
| 40 | 6400 |
| 50 | 8000 |
| 100 | 16000 |
| 500 | 80000 |
| 1000 | 160000 |
Frequently asked questions
How many square poles is 1 acre?
How do I convert acres to square poles?
How do I convert square poles back to acres?
How many square poles is 100 acres?
Popular area unit conversions
Convert Acre to other area units
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Metric / SI (16 units)
Imperial / US Customary (14 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Historical / Pre-metric European (6 units)
Sources & references
Conversion factor (1 ac = 160 pole²) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.