About HibiCalc
About HibiCalc
HibiCalc is a free browser-based calculator set for people living and working in Japan to check everyday financial and benefits-related amounts.
Last updated: July 27, 2026
5 calculator suites
| Suite | Main topics | Count |
|---|---|---|
| Finance | Loans, savings, simple and compound interest, present/future value | 35 |
| Health | Basal metabolism, BMI, pregnancy weeks, blood pressure, lab values | 37 |
| Pension & Social Insurance | Pensions, premiums, benefits, wage conversion | 32 |
| Tax | Consumption tax, inheritance/gift tax, withholding, deductions | 37 |
| Settlement | Ticket refunds, cash balancing, education costs, bill discount | 6 |
Implementation principles
Independent implementation
Each calculator is implemented in the HibiCalc codebase after confirming public input fields and standard formulas. It is not a mirror of private provider-side formula engines.
Use results for validation
Results can change by legal updates, tax rates, contract terms, and company-specific rules. Do not make irreversible decisions only from displayed values.
More information
What HibiCalc provides
- HibiCalc offers 147 standalone calculators covering loan repayment, savings, pensions, social insurance, taxes, settlement tasks, and health reference figures.
- Each calculator has its own URL and performs all computations in browser-side JavaScript. HibiCalc is not an official service of government agencies, banks, tax advisors, social insurance agents, or transport operators.