Precision Financial & Everyday Engines.
Bijoy Academy is an elite web software ecosystem providing 18 Apple-grade financial calculation engines and professional daily utilities. It features zero latency, 100% client-side privacy, zero data collection, and offline PWA functionality for modern founders.
18 Apple-grade calculation engines and client-side utilities. Engineered with sub-millisecond local compilation, zero data transmission, and liquid glass craftsmanship.
Zero-Knowledge Math
Algorithms run in your browser's isolated JavaScript thread. Numbers never travel across networks.
100% Offline PWA
Service Worker caching enables full computation during flights or remote network blackouts.
Vector PDF Engine
Instant in-memory vector rasterization. Export unbranded commercial invoices without accounts.
Sub-Millisecond Speed
Immediate mathematical evaluation without API gateways, server queues, or rate limits.
Need a Custom Calculation Engine or Interactive Web App?
We build high-performance client-side calculators, automated lead capture tools, and bespoke software systems for fast-growing businesses.
Executive PDF Invoicing Studio
Build, brand, and export itemized commercial client invoices. Multi-currency (USD, BDT, EUR), tax line-items, custom discounts, and unbranded vector print output with zero signup.
Profit Margin Calculator
Calculate gross profit, net margin, and markup percentages factoring COGS, shipping, and OpEx.
Margin = ((Rev - Cost) / Rev) × 100ROI & Yield Calculator
Determine return on investment capital, annualized CAGR returns, and capital multipliers.
CAGR = (Return/Cost)^(1/t) - 1Break-Even Point Analyzer
Find the exact unit volume and gross revenue required to fully cover fixed operating overhead.
BEP = Fixed / (Price - Variable)Retail Markup Calculator
Convert wholesale costs into optimal commercial prices with real-time margin parity sync.
Markup = ((Price - Cost) / Cost) × 100Commission Calculator
Calculate tiered commission brackets, base salary bonuses, and representative payouts.
Pay = Base + (Sales × Rate%)Freelance Rate Calculator
Reverse-engineer billable hourly and day rates from target take-home pay, overhead, and taxes.
Rate = (Salary + Exp + Tax) / Billable HrsSalary to Hourly Calculator
Convert annual salaries to hourly, daily, and bi-weekly pay with PTO and overtime values.
Hourly = Annual / (52 × Hours/Wk)Savings Goal Calculator
Compound interest wealth simulation with monthly deposits required to reach milestones.
FV = PV(1+r)^n + PMT[((1+r)^n - 1)/r]Percentage Calculator
Solve 3-way percentages, % increase/decrease, fractions, and proportional ratios.
Δ% = ((V2 - V1) / |V1|) × 100Word & Density Counter
Real-time character counts, reading time heuristics, Flesch grade, and keyword density.
FK = 206.835 - 1.015(W/S) - 84.6(Syl/W)Age & Milestone Tracker
Calculate exact chronological age in years, months, days, total hours, and birthday counts.
Δt = Target Date - Birth DateLive Currency Converter
Real-time global exchange rates with multi-currency spread fee margins and offline rates.
Net = (Amount / Rate_from) × Rate_to × (1 - Fee%)Discount & Tax Engine
Calculate sequential compounding promo discounts, coupons, and regional sales tax.
Final = Price × (1 - D1%) × (1 - D2%) + TaxTip & Bill Splitter
Split restaurant checks evenly, compute custom tip percentages, and round up totals.
Per Person = (Bill + Tip) / Group CountVector QR Code Generator
Generate high-DPI vector QR codes for URLs, WiFi passwords, vCards, and emails.
Reed-Solomon Error Correction L/M/Q/HCryptographic Key Studio
Generate unbreakable random passwords using browser WebCrypto CSPRNG and entropy scoring.
Entropy = L × log2(|Pool|) BitsNeed a Custom Calculation Engine or Web Software?
Our senior engineering studio builds Apple-grade digital tools, interactive financial dashboards, and client portal software built for high conversions.
Request Custom Proposal