Smart Calculator platform
Clear, reliable calculation tools for phones and computers.
Smart Calculator · Linear Algebra
Choose an operation, paste or type your matrices, and read a structured result. Real matrices up to 6 × 6 are supported.
Matrix workspace
One row per line · spaces or commas between values
Result
A + BInput and result dimensions will appear here.
Eigenvectors are available for all real 2 × 2 matrices and for real symmetric matrices up to 6 × 6. Complex 2 × 2 eigenpairs are displayed symbolically.
Smart Calculator · Computer Calculator
Explore exact number representations, follow ALU and LMC steps, and calculate practical architecture quantities.
Convert exact values and inspect every fixed-width interpretation.
Decode sign, exponent and fraction, including special values and neighbours.
A 100-mailbox sandbox with visible fetch-decode-execute state.
Every result shows its units and assumptions.
Smart Calculator · Economics Calculator
Convert currencies, inspect official Hong Kong rates, and model interest, loans and cash flows without hidden formulas.
HKD is the default base. Rates are references, not executable trading quotes.
Source: Frankfurter v2 / European Central Bank reference rates. frankfurter.dev · Reference only; not a bank or trading quote.
Latest complete dated records from official HKMA public APIs.
Source: Hong Kong Monetary Authority (HKMA) public API. HKMA API
The best lending rate series is HSBC's quoted rate; it does not represent every bank.
Choose simple or compound interest and state the compounding/day-count basis.
Hong Kong products do not all use one universal algorithm; check the contract's simple/compound and ordinary/leap-year basis.
Educational scenarios only—not a bank approval or quotation.
Educational fee-aware IRR estimate, not a formal APR calculated under every HKAB rule.
Secondary tools for budgets, savings goals and real returns.
Ten-language guide
Learn the keys, modes, and common calculation workflows.