Select a category
Conversion Formula:
Convert Stremma to Barn (str to b) instantly with accurate, readable results.
Convert between square meters, acres, square feet, hectares, and other common units with our Area Unit Converter. This intuitive unit conversion tool helps you calculate land size, floor space, and surface area across both metric and imperial systems. Whether you're working on real estate, construction, or geography tasks, our area unit conversion calculator ensures precise and instant results.
Stremma (στρέμμα) - Greek land area
Stremma is a regional metric unit of land area used in Greece, equal to one decare (1,000 square meters). Used in agriculture, real estate, and cadastral records throughout Greece.
- Names/aliases: στρέμμα (Greek), stremma, decare; abbreviations: στρ., str
- System: Metric (non-SI, regional)
- Exact relations: 1 stremma = 1,000 m² = 10 a = 0.1 ha
- Imperial/US equivalents: 1 stremma ≈ 0.247105381 acres ≈ 10,763.9104 ft²
- Typical examples: farm fields and olive groves measured in stremmata; property listings and land-use plans in Greece
Barn (b) - nuclear/particle cross-section area
Barn is a non-SI unit of area used in nuclear and particle physics to express interaction cross-sections. The name originated humorously during the Manhattan Project (“as big as a barn”).
- Symbol: b
- System: Non-SI (accepted in high-energy/nuclear physics)
- Exact relations: 1 b = 10⁻²⁸ m² = 10⁻²⁴ cm² = 100 fm²
- Common submultiples: 1 mb = 10⁻³ b; 1 µb = 10⁻⁶ b; 1 nb = 10⁻⁹ b; 1 pb = 10⁻¹² b; 1 fb = 10⁻¹⁵ b; 1 ab = 10⁻¹⁸ b
- Related usage: integrated luminosity often quoted in inverse barns (e.g., fb⁻¹)
- Typical examples: neutron capture and scattering cross-sections; collider process cross-sections reported from barns down to picobarns and femtobarns