Convert Acre to Tsubo
Convert acres to tsubos instantly. 1 acre = 1224.1685590175 tsubo — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Tsubo 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.
Tsubo
A tsubo is a Japanese unit of area equal to approximately 3.3058 m² (about 35.58 square feet). It is functionally identical to the Korean pyeong.
Defined as a 6-by-6 shaku square; the shaku is the traditional Japanese foot. Standardized as 400/121 m² in modern Japanese law.
Tsubos remain in widespread use in Japanese real estate, particularly for residential apartments and small commercial spaces. Property listings often cite both tsubo and square meters.
Traditional Japanese unit; legally retained in Japan for real estate.
Acre to Tsubo conversion formula
The relationship between acres and tsubos:
To convert acres to tsubos, multiply the value in acres by 1224.1685590175. To reverse, multiply tsubos by 0.000816881.
How to use this converter
Type a value into the calculator. The result in tsubos updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Tsubo to Acre converter for the reverse direction.
Step-by-step: convert acres to tsubos
- Write down the value in acres (ac).
- Multiply that value by the factor 1224.1685590175.
- The product is the equivalent value in tsubos (tsubo).
- To reverse, multiply the tsubo value by 0.000816881.
Worked examples
Example 1 — Convert 1 ac to tsubo:
1 × 1224.1685590175 = 1224.1685590175 tsubo
Example 2 — Convert 100 ac to tsubo:
100 × 1224.1685590175 = 122416.8559017485 tsubo
Real-world example — Geographic to human-scale conversion
One acre converts to a precise number of tsubos — the everyday arithmetic for navigation systems, race-distance calculations, and any context where bigger geographic units must be related to the smaller working units.
1 ac × 1224.1685590175 = 1224.1685590175 tsubo
Real-world example — Lap pacing and route segmentation
Translating a acre-scale distance into tsubos is how runners, cyclists, and route planners convert top-line totals into the working segments they actually pace and execute.
1 ac × 1224.1685590175 = 1224.1685590175 tsubo
Real-world example — Track athletics distances
A 1-acre running track equals one thousand tsubos. Track athletes' lap pacing converts the lap (often 400 of the smaller unit) into the fractional race distance whenever a coach reviews splits.
1 ac × 1224.1685590175 = 1224.1685590175 tsubo
Acre to Tsubo conversion table
Standard reference values for converting acres to tsubos:
| Acre [ac] | Tsubo [tsubo] |
|---|---|
| 0.01 | 12.2416855902 |
| 0.1 | 122.4168559017 |
| 1 | 1224.1685590175 |
| 2 | 2448.337118035 |
| 3 | 3672.5056770525 |
| 4 | 4896.6742360699 |
| 5 | 6120.8427950874 |
| 10 | 12241.6855901748 |
| 20 | 24483.3711803497 |
| 30 | 36725.0567705245 |
| 40 | 48966.7423606994 |
| 50 | 61208.4279508742 |
| 100 | 122416.8559017485 |
| 500 | 612084.2795087423 |
| 1000 | 1224168.5590174845 |
Frequently asked questions
How many tsubos is 1 acre?
How do I convert acres to tsubos?
How do I convert tsubos back to acres?
How many tsubos is 100 acres?
Popular area unit conversions
Convert Acre to other area units
Show all Acre conversions
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 = 1224.1685590175 tsubo) 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.