国別・地域別 単位測定規格ガイド（尺貫法・ヤードポンド・国際単位系）
測定カテゴリ間をスムーズに切り替え、リアルタイムで全単位マトリックスを計算し、瞬時に結果をコピーできます。
Formula: °C = (°F - 32) × 5/9
United States
US Customary System (NIST)
NIST statutory measurement standards widely utilized across aerospace, civil construction, manufacturing, and commerce in the USA.
United Kingdom & Commonwealth
British Imperial System (Weights & Measures Act)
Traditional British imperial standards still active in commercial packaging, human body mass, and road distance.
India & South Asia
Indian Traditional & State Statutory Standards
Standard statutory land record measurements (Bigha, Guntha, Gaj, Katha, Cent) recognized across state revenue departments.
Japan
Japanese Shakkan-hō (尺貫法) Traditional System
Traditional architectural, woodworking, and real estate standards maintained across Japan (Tsubo, Shaku, Ken).
International SI / Metric
International System of Units (BIPM / ISO 80000)
The global scientific and commercial standard adopted by 95%+ of the world population, defined by universal physical constants.