Convert Hectare to Square Thou
Convert hectares to square thous instantly. 1 hectare = 1.550003e+13 square thou — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Thou to Hectare converter for the reverse conversion.
Units explained
Hectare
A hectare is a metric unit of area equal to 10,000 square meters, or one square hectometer. It is the most widely used metric unit for land measurement worldwide.
Defined as 100 ares, equal to one square hectometer. The name was introduced in 1795 in France as part of the metric system.
Hectares are the standard unit for agricultural land measurement worldwide except in the US (which uses acres). 1 hectare equals 2.47105 acres. In India, hectares are used in modern agricultural census and land records alongside traditional regional units.
Adopted in France in 1795; standardized internationally through the SI system.
Square Thou
A square thou is an imperial unit of area equal to 6.4516×10⁻¹⁰ m², identical to the square mil. The word 'thou' is short for 'thousandth' (of an inch).
Identical in value to the square mil; 'thou' is the British engineering term, 'mil' is the American term. Both refer to 1/1000 of an inch.
Square thous are used in British and Commonwealth engineering contexts where 'thou' is preferred over 'mil', particularly in mechanical engineering tolerance specifications.
Standardized via the 1959 International Yard and Pound Agreement.
Hectare to Square Thou conversion formula
The relationship between hectares and square thous:
To convert hectares to square thous, multiply the value in hectares by 1.550003e+13. To reverse, multiply square thous by 6.4516e-14.
How to use this converter
Type a value into the calculator. The result in square thous 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 Thou to Hectare converter for the reverse direction.
Step-by-step: convert hectares to square thous
- Write down the value in hectares (ha).
- Multiply that value by the factor 1.550003e+13.
- The product is the equivalent value in square thous (thou²).
- To reverse, multiply the square thou value by 6.4516e-14.
Worked examples
Example 1 — Convert 1 ha to thou²:
1 × 1.550003e+13 = 1.550003e+13 thou²
Example 2 — Convert 100 ha to thou²:
100 × 1.550003e+13 = 1.550003e+15 thou²
Real-world example — Geographic to wavelength scale
One hectare equals one trillion square thous — illustrating the 12-order-of-magnitude span between geographic distance and atomic-feature scales.
1 ha × 1.550003e+13 = 1.550003e+13 thou²
Real-world example — Kilometres to wavelengths
One hectare equals one trillion square thous — a conversion physics teachers use to convey the gulf between everyday geographic and atomic scales.
1 ha × 1.550003e+13 = 1.550003e+13 thou²
Hectare to Square Thou conversion table
Standard reference values for converting hectares to square thous:
| Hectare [ha] | Square Thou [thou²] |
|---|---|
| 0.01 | 1.550003e+11 |
| 0.1 | 1.550003e+12 |
| 1 | 1.550003e+13 |
| 2 | 3.100006e+13 |
| 3 | 4.650009e+13 |
| 4 | 6.200012e+13 |
| 5 | 7.750016e+13 |
| 10 | 1.550003e+14 |
| 20 | 3.100006e+14 |
| 30 | 4.650009e+14 |
| 40 | 6.200012e+14 |
| 50 | 7.750016e+14 |
| 100 | 1.550003e+15 |
| 500 | 7.750016e+15 |
| 1000 | 1.550003e+16 |
Frequently asked questions
How many square thous is 1 hectare?
How do I convert hectares to square thous?
How do I convert square thous back to hectares?
How many square thous is 100 hectares?
Popular area unit conversions
Convert Hectare to other area units
Show all Hectare conversions
Metric / SI (15 units)
Imperial / US Customary (15 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 ha = 1.550003e+13 thou²) 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.