# 1. Install the three foundational packages
$ npm install @finengine/core @finengine/math @finengine/ui
# 2. Run a deterministic 36-month amortization
$ node -e "import('@finengine/math').then(m => console.log(m.amortize({principal:500000,annualRate:13.5,months:36})))"
→ Monthly EMI: BDT 16,968 · Total Payable: BDT 610,835 · Total Interest: BDT 110,835
// 100% client-side. No backend. Deterministic IEEE-754 rounding.import { amortize } from '@finengine/math';
import { formatMoney } from '@finengine/core';
const plan = amortize({
principal: 500000,
annualRate: 13.5,
months: 36,
});
console.log(formatMoney(plan.monthlyPayment, 'BDT'));
// → "BDT 16,968.00" : identical across browsers, locales, timezones.<!-- Vanilla JS : no bundler, no toolchain -->
<script type="module"
src="https://cdn.jsdelivr.net/gh/gmrafi/FinEngine@main/packages/math/dist/index.js"></script>
<script type="module">
import { amortize } from '@finengine/math';
const r = amortize({ principal: 500000, annualRate: 13.5, months: 36 });
</script><!-- FinEngine WordPress Shortcode -->
[finengine_calculator currency="BDT" default_principal="500000" default_rate="12.0" default_tenure="36"]
<!-- Native Gutenberg Block & Full-Site Editing Theme (Trac #293749) -->
<!-- Zero PHP dependencies, zero backend bloat, 100% deterministic -->
→ Embed interactive loan, EMI, and savings calculators anywhere in WPCompute exact Equal Monthly Installments (EMI), principal allocation, and interest cost in real time with zero server latency.
FinEngine decouples mathematical precision from UI rendering, giving fintech builders auditable primitives for browsers, Node.js, and edge runtimes.
Equal Monthly Installments (EMI), reducing balance, flat interest, and compound schedules computed with pure mathematical determinism.
import { amortize } from '@finengine/math';
const plan = amortize({ principal: 500000, annualRate: 13.5, months: 36 });
// plan.monthlyPayment → 16968 (Exact integer rounding)
// plan.schedule[0] → { principal: 11343, interest: 5625, balance: 488657 }Standard JavaScript float math accumulates rounding errors that break ledger balance during iterative calculations.
0.1 + 0.2 === 0.30000000000000004
Drift
exactSum(0.1, 0.2) === 0.300000
Exact
Built-in South Asian numbering (Lakh / Crore), BDT symbol conventions, and regulatory loan-fee deductions for microfinance and retail banking.
Production-ready repayment tables, borrower burden ratio meters, and schedule summary components for modern dashboards.
Live TypeScript scratchpad running directly in your browser. Edit formulas, change loan variables, and audit mathematical precision against standard IEEE-754 drift in real time.
0.30000000000000004
0.3
Comprehensive documentation, live runnable examples, and research methodology archived with permanent academic DOIs.