Precision Calculators & Developer Utilities
50+ high-speed, private calculation engines for Indian & global finance, loan amortization, health metrics, and developer cryptography.
Calculations and files execute exclusively in local browser memory via WebAssembly. No data leaves your machine.
š„ Featured Calculators & Dev Utilities
HIGH FREQUENCYImmediate 1-click launch for 80% of daily finance & coding calculations
š§® Everyday Precision Math & Life Tools
All-in-One Percentage
5-in-1 calculator: What is X% of Y, % change, discount & fractions
Date Diff & Business Days
Exact days, weeks, months & working business days between dates
Unit Converter
High-precision length, weight, data & temperature conversion
Tip & Bill Splitter
Split restaurant bills with custom tip %, tax & share breakdown
Aspect Ratio Scaler
Calculate dimensions for 16:9, 4:3, 21:9, 9:16 and 4K presets
Fuel Cost & Mileage
Calculate trip fuel consumption, road trip cost & carpool shares
Password Generator
Cryptographically strong random password and pass-phrase generator
Text & Word Counter
Character, word, sentence, reading time and syllable statistics
Candidate Name & DOP Stamper
Govt exam photo resizer with white name & date banner (SSC, UPSC, IBPS 20KB-50KB)
Indian Land Area Converter
Convert Guntha, Cent, Ground, Bigha (Pucca/Kacha), Kanal, Marla, Biswa & Katha with state rules
Recipe Ingredient Scaler
Multiply or divide cooking recipe ingredients by servings with fractions & checklist
Oven Temperature & Fan
Fahrenheit, Celsius & Gas Mark converter with -20Ā°C fan convection adjustment
Laundry Care Symbols
Interactive clothing care label decipherer for washing, drying, bleaching & ironing
Step-by-Step Fraction Calculator
Add, subtract, multiply & divide fractions and mixed numbers with LCD derivations
Quadratic Equation Solver
Solve axĀ² + bx + c = 0 with discriminant, vertex coordinates & real/complex roots
Statistics & Distribution Engine
Mean, median, mode, sample/population std dev, quartiles, IQR & outlier detection
Matrix Operations Studio
2x2 & 3x3 matrix determinant, inverse, transpose, addition & multiplication
Significant Figures & Sci Notation
Count sig-figs, scientific (a Ć 10įµ) & engineering notation with rounding rules
Global Meeting Timezone Planner
Synchronized 24-hour overlap timeline across NYC, London, Tokyo, Mumbai & SF
š Health, Fitness & Body Composition
TDEE & Calorie Deficit
Daily energy expenditure, cutting/bulking calories & macro split
BMI & Calorie BMR
Body mass index and basal metabolic rate with healthy ranges
US Navy Body Fat %
Clinical body composition from neck, waist, hip measurements
Ideal Body Weight
Compares Devine, Robinson, Miller, and Hamwi medical formulas
Daily Hydration Tracker
Optimal daily water intake in liters and 250ml glass checklist
Pregnancy Due Date
Naegele rule, fertile window predictor and trimester milestones
eGFR Kidney Function
2021 CKD-EPI race-free equation & KDIGO chronic kidney disease staging from serum creatinine
Pediatric Dosage by Weight
Safe liquid medication dosing (Tylenol, Advil, Amox) in mL with adult safety caps
Target Heart Rate Zones
Karvonen Heart Rate Reserve & Tanaka formula: 5 personalized cardiovascular training zones
Dog & Cat Age in Human Years
Veterinary science aging curves based on canine breed weight classes and feline stages
š Academic & Student Calculators
GPA / CGPA to % Converter
Indian 10.0 scale (CBSE x9.5) and US 4.0 scale GPA converter
Final Exam Target Grade
Calculate required final exam score to achieve target grade
Exact Age & Milestones
Calculate exact age in years, months, days, hours & seconds lived
Indian University CGPA Memo
CBSE, VTU, Mumbai Univ, Anna, AKTU, DU, JNTU official % conversion with certificate memo
š» Developer Cyber-Lab & Utilities
Markdown Live Studio
Real-time WYSIWYG Markdown to HTML editor with live preview & stats
JSON Formatter & Minifier
Format, validate, prettify, fix and minify JSON data
Mock Data Synthesizer
Generate realistic JSON, CSV & SQL mock data for users, addresses & transactions
CSS Glass & Shadow Lab
Interactive multi-layer box-shadow, Glassmorphism, Neumorphism & Clip-path generator
SVG Optimizer & JSX
SVGO-style cleaner, path minifier and instant React JSX component converter
Data Format Translator
Bidirectional converter between JSON, YAML, XML, and CSV with real-time validation
AES-256-GCM Cyber Vault
Military-grade in-browser client-side encryption, decryption & RSA keypair generation
Base64 Universal Studio
Encode & decode text, images, and binary files with Data URIs
Crypto Hash & HMAC
Hardware Web Crypto SHA-256, SHA-512, MD5, SHA-1 & HMAC
UUIDv7 & v4 Generator
Time-ordered RFC 9562 UUIDv7, random UUIDv4 & bulk batches
SQL Query Formatter
Multi-dialect SQL beautifier for PostgreSQL, MySQL, SQLite, T-SQL
Color Studio & WCAG 2.2
HEX, RGB, HSL, CMYK, OKLCH converter & WCAG contrast checker
Number Base & Bitwise
Binary, Octal, Decimal, Hexadecimal, ASCII & interactive bit-grid
JSON to TypeScript & Zod
Automatic type inference, TypeScript interface & Zod generator
URL Encoder / Decoder
Encode/decode URLs and parse query parameter strings
Cron Explainer
Human readable explanation of crontab schedule syntax
Epoch Timestamp
Convert Unix timestamp to UTC, Local & IST
JWT Debugger & Inspector
Decode header & payload, inspect expiry claims & verify HMAC-SHA256 client-side
RegEx Visual Tester
Real-time regex pattern matcher with color-coded capture groups & syntax presets
cURL to Code Converter
Convert curl terminal commands to JS fetch/Axios, Python requests, Go & PHP
Subnet & CIDR IP Calculator
IPv4 subnet masks, wildcard, network/broadcast address, host ranges & 32-bit binary
Text & Code Diff Inspector
Line-by-line visual difference comparison with additions, deletions & split views
š° Financial, Investment & Tax Calculators
SIP & Wealth Projector
Mutual fund SIP with annual step-up & inflation adjustment
Mortgage & Amortization
Monthly P&I, property tax, insurance, PMI & amortization table
Income Tax (FY 2025ā26 / AY 2026ā27)
Old vs New regime comparison with revised ā¹75k standard deduction & 87A rebate
US Paycheck & Take-Home
Federal withholding, 50 states, FICA, 401(k), HSA take-home salary
Stripe & PayPal Gross-Up
Freelancer reverse gross-up fee calculator for Stripe, PayPal, Wise & Upwork
GST India Calculator
Calculate CGST, SGST, IGST with interstate & inclusive rates
PPF Maturity & Interest
Statutory 7.1% interest with 5-year extension block simulator
Loan EMI & Prepayment
Calculate monthly EMI and prepayment interest savings
SWP Systematic Withdrawal
Monthly withdrawal drawdown with capital depletion tracker
Salary In-Hand (CTC)
Breakdown monthly take-home, PF (12%), HRA, PT & monthly TDS
NPS Pension & Annuity
60% tax-free lump sum and monthly annuity pension at age 60
Margin vs Markup Solver
Bidirectional multi-variable profit, cost & selling price solver
Sukanya Samriddhi (SSY)
8.2% government scheme for girl child with 21-year maturity table
HRA Exemption u/s 10(13A)
Calculate tax-exempt rent allowance & optimal rent threshold
Capital Gains Tax
12.5% LTCG, 20% STCG on stocks and real estate dual-indexation
Compound Interest
Calculate wealth growth with compounding frequencies & tables
Fixed Deposit (FD)
Quarterly compounding bank deposit maturity and interest payout
CAGR Return
Compound annual growth rate for multi-year stock investments
Inflation Impact
Calculate future purchasing power erosion on savings
Gratuity Calculator
Statutory gratuity per Payment of Gratuity Act 1972
Discount & Sale
Calculate sale prices, double coupons & effective savings
Currency Converter
Live baseline exchange rates (USD, INR, EUR, GBP, JPY, AED)
UPI & QR Pay Generator
Generate UPI payment QR codes instantly with custom amount
Kirana Cash Memo & UPI QR
Retail grocery bill maker with dynamic NPCI UPI payment QR & thermal 58mm/80mm receipt
11-Month Rental Agreement
Indian residential tenancy contract with 4-inch (100mm) blank top margin for e-Stamp paper
Amazon FBA & Shopify Profit
Calculate FBA referral fees, fulfillment tiers, storage costs, net margin & ROI %
Freelance Hourly & Day Rate
Calculate billable hourly/day rate from target salary, overhead & tax buffer
šØ Trade, Construction & DIY Commercial Suite
Concrete Slab & Bags
Cubic yards, 80lb/60lb bags, truck loads & cost with waste allowance
Drywall Sheets & Mud
4x8 & 4x12 panels, joint compound buckets, screws & tape with deductions
Paint Coverage & Gallons
Net paintable area, 5-gal pails vs 1-gal cans & primer with coats calculator
Tile, Flooring & Mortar
Boxes, individual tiles, pattern waste (Grid, Offset, Herringbone) & thinset mortar
NEC Wire Gauge & Drop
NEC Chapter 9 Table 8 wire sizes for copper/aluminum with 3% voltage drop limit
HVAC BTU & AC Tonnage
Manual J-simplified heating/cooling BTU load & AC tonnage by room volume & climate
Freight CBM & Volumetric Weight
Calculate shipment Cubic Meters (CBM), CFT & compare actual vs dimensional weight
š¬ Science, Clinical & Electronics Precision Tools
eGFR Kidney Function
2021 CKD-EPI race-free equation & KDIGO chronic kidney disease staging from serum creatinine
Pediatric Dosage by Weight
Safe liquid medication dosing (Tylenol, Advil, Amox) in mL with adult safety caps
Target Heart Rate Zones
Karvonen Heart Rate Reserve & Tanaka formula: 5 personalized cardiovascular training zones
Resistor Color Decoder
Interactive 4, 5, and 6-band resistor color decoder with live SVG graphic & E-series presets
Chemical Molarity & Dilution
Molar solution solute mass (mass = M Ć V Ć MW) & stock dilution (CāVā = CāVā) protocol
š Everyday Life, Culinary & Commercial Legal Contracts
Recipe Ingredient Scaler
Multiply or divide cooking recipe ingredients by servings with fractions & checklist
Oven Temperature & Fan
Fahrenheit, Celsius & Gas Mark converter with -20Ā°C fan convection adjustment
Laundry Care Symbols
Interactive clothing care label decipherer for washing, drying, bleaching & ironing
Dog & Cat Age in Human Years
Veterinary science aging curves based on canine breed weight classes and feline stages
Vehicle & General Bill of Sale
50-State legal bill of sale PDF generator with AS-IS warranty and odometer certification
Mutual & Unilateral NDA
Commercial non-disclosure confidentiality agreement generator with court-ready PDF export