Convert Hectare to Microbarn
Convert hectares to microbarns instantly. 1 hectare = 1e+38 microbarn — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Microbarn 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.
Microbarn
A microbarn is a scientific unit of area equal to exactly 10⁻³⁴ m² (10⁻⁶ barn).
Derived from the barn using the standard SI micro- prefix. Identical in value to the humor unit 'outhouse'.
Microbarns appear in particle physics for moderately rare process cross-sections. They are widely used in heavy-ion physics and electroweak cross-section measurements.
Standard derivative of the barn unit.
Hectare to Microbarn conversion formula
The relationship between hectares and microbarns:
To convert hectares to microbarns, multiply the value in hectares by 1e+38. To reverse, multiply microbarns by 1e-38.
How to use this converter
Type a value into the calculator. The result in microbarns updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Microbarn to Hectare converter for the reverse direction.
Step-by-step: convert hectares to microbarns
- Write down the value in hectares (ha).
- Multiply that value by the factor 1e+38.
- The product is the equivalent value in microbarns (µb).
- To reverse, multiply the microbarn value by 1e-38.
Worked examples
Example 1 — Convert 1 ha to µb:
1 × 1e+38 = 1e+38 µb
Example 2 — Convert 100 ha to µb:
100 × 1e+38 = 1e+40 µb
Real-world example — Geographic to wavelength scale
One hectare equals one trillion microbarns — illustrating the 12-order-of-magnitude span between geographic distance and atomic-feature scales.
1 ha × 1e+38 = 1e+38 µb
Real-world example — Kilometres to wavelengths
One hectare equals one trillion microbarns — a conversion physics teachers use to convey the gulf between everyday geographic and atomic scales.
1 ha × 1e+38 = 1e+38 µb
Hectare to Microbarn conversion table
Standard reference values for converting hectares to microbarns:
| Hectare [ha] | Microbarn [µb] |
|---|---|
| 0.01 | 1e+36 |
| 0.1 | 1e+37 |
| 1 | 1e+38 |
| 2 | 2e+38 |
| 3 | 3e+38 |
| 4 | 4e+38 |
| 5 | 5e+38 |
| 10 | 1e+39 |
| 20 | 2e+39 |
| 30 | 3e+39 |
| 40 | 4e+39 |
| 50 | 5e+39 |
| 100 | 1e+40 |
| 500 | 5e+40 |
| 1000 | 1e+41 |
Frequently asked questions
How many microbarns is 1 hectare?
How do I convert hectares to microbarns?
How do I convert microbarns back to hectares?
How many microbarns 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 = 1e+38 µb) 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.