تبدیل تومان ↔ ریال

Compute a biweekly amortization schedule (26 payments/year), include extra payments, and export the table to CSV.

Estimate future value and Effective Annual Rate from APR, compounding frequency, years, and optional monthly contributions. Copy a shareable result link.

Calculate Japanese consumption tax with standard 10%, reduced 8%, or custom rates per item. Switch between tax-exclusive and tax-inclusive input, control rounding, export CSV, print, and share results.