Financial & Math Calculators
Make informed personal finance and mathematical decisions with NexVaani financial and conversion calculators. From calculating monthly loan EMIs with full amortization schedules to modeling mutual fund SIP compounding, paycheck income tax breakdowns, and geometric aspect ratios, our calculators use high-precision arithmetic engines to eliminate floating-point rounding errors.
🧮 Available Financial & Math Calculators (39)
100% Free & PrivatePercentage Calculator
Calculate percentages, percentage increase/decrease, and percentage differences with PDF summary reports.
Percentage Increase Calculator
Calculate percentage growth, salary increments, price markups, and relative decline with full formulas.
Discount Calculator
Calculate final sale prices, discount amounts, and savings with optional sales tax inclusion.
Loan EMI Calculator
Calculate monthly loan EMI payments, total interest payable, and full yearly amortization schedules.
Mortgage Calculator
Calculate monthly mortgage payments including principal, interest, property taxes, and home insurance.
ROI Calculator
Calculate Return on Investment (ROI), total net profit, and investment efficiency percentages.
Compound Interest Calculator
Calculate compound interest growth, future investment values, and monthly contribution yields.
Salary to Hourly Calculator
Convert annual salary to hourly wage, monthly pay, bi-weekly paychecks, and daily rates.
Sales Tax Calculator
Calculate total sales tax, final checkout prices, or reverse calculate pre-tax amounts from gross totals.
Margin & Markup Calculator
Calculate gross profit margin, markup percentage, cost of goods, and selling revenue prices.
Currency Converter
Convert global currencies with indicative exchange rates and instant conversion tables.
Profit Margin Calculator
Calculate gross profit margin, markup percentage, revenue, and net profit from unit cost and selling price.
Inflation Calculator
Calculate the erosion of purchasing power and future equivalent value of money based on inflation rates.
Tip & Bill Split Calculator
Calculate restaurant gratuity (15%, 18%, 20%, 25%) and split the total bill evenly among friends.
Fuel Cost Calculator
Calculate total gasoline expense, fuel consumption (liters/gallons), and per-passenger travel costs for road trips.
BMI Health Calculator
Calculate Body Mass Index (BMI) for adults with metric and imperial units, WHO weight categories, and ideal weight targets.
Time Duration Calculator
Calculate elapsed hours, minutes, and days between two times or calendar dates with work hours tracking.
Universal Unit Converter
Convert between metric and imperial units for length, weight, temperature, area, volume, speed, and digital storage.
Length & Distance Converter
Convert length and distance between centimeters, meters, kilometers, inches, feet, yards, and miles.
Weight & Mass Converter
Convert weight and mass between kilograms, grams, milligrams, pounds, ounces, stone, and metric tons.
Temperature Converter
Convert temperature scales between Celsius (°C), Fahrenheit (°F), and Kelvin (K) with instant formula walkthrough.
Random Number Generator
Generate random numbers, rolls, and sequences between any min and max values using Web Crypto API.
SIP Investment Calculator
Calculate maturity wealth, invested capital, and compounding returns for monthly mutual fund SIPs with visual charts.
GST Tax Calculator
Calculate GST amounts (3%, 5%, 12%, 18%, 28%) with forward/reverse calculation and CGST/SGST breakdown.
Loan Prepayment Calculator
Calculate total interest saved and tenure reduction when making extra monthly or yearly lump sum loan prepayments.
Retirement & FIRE Corpus Calculator
Calculate target retirement nest egg and required monthly SIP investment adjusted for inflation and life expectancy.
Home Loan + SIP Recovery Calculator
Calculate how a small monthly SIP investment completely covers and recovers 100% of your home loan bank interest.
Age Calculator
Calculate exact age in years, months, weeks, days, hours, and minutes with countdown to your next birthday.
Ramadan Prayer Times & Fasting Timetable
Check daily Sehri, Iftar, Fajr, Dhuhr, Asr, Maghrib, and Isha prayer times with live countdown for cities worldwide.
College GPA & CGPA Calculator
Calculate college semester GPA and cumulative CGPA across USA 4.0 scale, Indian 10-point scale, and UK Degree Honours classifications.
US Paycheck & Salary Tax Calculator
Calculate take-home pay, federal income tax, state tax, Social Security (FICA), and Medicare deductions for hourly and salaried jobs.
Global VAT & Sales Tax Calculator
Add or remove Value Added Tax (VAT) with international country presets (UK 20%, EU, Gulf 15%, Australia 10%).
Hijri & Gregorian Date Converter
Convert dates between Islamic Hijri lunar calendar and Western Gregorian solar calendar with Umm al-Qura astronomical accuracy.
Income Tax Calculator (India & US)
Compare India Income Tax FY 2026-27 under New Regime vs Old Regime side-by-side with Section 87A rebate and ₹75,000 standard deduction. Also calculates US Federal Tax.
Goal-Based Investment & Wealth Planner
Plan long-term financial goals (Child Education, Home Purchase, Retirement). Calculates inflation-adjusted future target costs and required monthly SIP investments.
Gold & Jewelry Price Calculator (with GST & Wastage)
Calculate the exact price of gold jewelry. Itemizes 24K, 22K (Hallmark) and 18K gold rate, making charges/wastage %, and 3% GST. Supports grams, tola, and pavan.
Date Difference Calculator
Calculate the exact number of days, weeks, months, and working business days between any two calendar dates.
Numerology Calculator
Calculate your life path, birthday, and expression numbers from your date of birth and full name, with complete interpretations.
Pregnancy Due Date Calculator
Calculate pregnancy due date from last period, current week, trimester, and key scan milestones — private and instant.