Shakkan-hō Pro Converter
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| Rating | |||
|---|---|---|---|
| Japan | 100%3 | 5.00 | |
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| Antigua And Barbuda | <1%0 | — | |
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Description
Shakkan-hō Pro — Professional unit conversion & aggregation app
Overview
Shakkan-hō Pro instantly converts between Japan's traditional shakkan-hō units and modern metric or imperial systems. Ideal for stoneworkers, builders, surveyors, farmers, real estate professionals and traders who need accurate, work-ready conversions and totals.
Who it's for
Stone industry — calculate sai (才) ⇄ cubic meters, cubic shaku volumes, and manage tombstone and stone block dimensions; sum multiple stone sizes for estimates.
Construction & architecture — convert ken, shaku, sun for drawings and precise measurements; convert tsubo ⇄ square meters for area planning.
Real estate — compute land area in tsubo, tan, se, chobu and present clear metric equivalents for listings and valuations.
Agriculture & forestry — manage fields in tan/are/chobu for yield estimates and subsidy paperwork.
Trade & export — convert pounds, yards, barrels, gallons between US/UK systems and metric.
Jewelry & precious metals — monme ⇄ grams, carat conversions and metal weight calculations.
Key features
Comprehensive unit coverage
Length: ri, cho, jō, ken, shaku, sun, bu, rin, mō ⇄ km, m, cm, mm ⇄ mile, yd, ft, in
Area: chōbu, tan, se, tsubo, gō ⇄ km², ha, a, m² ⇄ acre, yd², ft²
Weight: kan, kin, monme, fun, rin ⇄ ton, kg, g ⇄ lb, oz, grain (carat supported)
Volume: koku, to, shō, gō, sai, cubic-shaku ⇄ m³, L, mL ⇄ bbl, gal, qt, pt
Aggregate calculator
Auto-sum multiple conversion results (e.g., combine several stone blocks’ sai)
Keep historical calculations for quick reference
Calculate required order quantities for materials
Dimension-based volume calculations
Enter length × width × height in shakkan-hō to get m³ and sai
Ideal for stone, timber and material volume estimates
Professional accuracy
Up to 6 decimal places for high-precision needs
Scientific notation for very large/small values
Reliable for professional use
Usability
One-tap copy of results
Three adjustable font sizes
Dark mode
Supports 10 languages (Japanese, English, Simplified/Traditional Chinese, Korean, Spanish, German, Italian, French, Arabic)
Other benefits
Fully offline — no internet required
Lightweight and responsive UI
Clear conversion tables for quick checks
Secure local data storage only (no cloud sync by default)
Recommended users
Architects, carpenters, stonemasons, real estate agents, farmers, exporters, gemologists, antiques appraisers, traditional craftsmen, land surveyors, construction consultants.
Shakkan-hō Pro brings Japan’s traditional measurement systems into modern workflows — precise, fast, and tailored for professionals.