Online Financial, Scientific & Math Calculators
Calculate income tax regimes, loan EMI schedules, GST breakdowns, BMI, age, and scientific formulas locally.
About Calculators
Make accurate financial, scientific, and everyday numerical decisions with FileTools suite of 8 precision calculators. Compute income tax liabilities comparing Old vs. New tax slabs, generate monthly loan EMI amortization schedules, calculate GST component breakdowns, solve complex trigonometric equations, convert SI/imperial units, and check BMI health categories instantly on your device without storing financial data.
Most Popular Calculators
Income Tax Calculator
Calculate Indian income tax for AY 2026-27 (FY 2025-26), compare Old vs New Tax Regime, view tax slabs, standard deductions, 87A rebate, and estimated savings.
EMI Calculator
Calculate monthly loan installments, total interest, and full amortization schedule.
Scientific Calculator
Advanced precision mathematical calculator with trigonometry, logarithms, powers, roots, constants, and calculation history.
Percentage Calculator
Calculate percentages, percentage change, percentage difference, and fraction to percent conversions.
GST Calculator
Calculate GST amount, pre-tax net price, gross price, and CGST/SGST/IGST tax breakdowns.
BMI Calculator
Calculate your Body Mass Index (BMI), health classification according to WHO, and ideal weight range.
Explore by Subcategory
Organized tools grouped by specific document transformation and processing intent
Income Tax, GST & Financial Planning
3 toolsCalculate income tax under old vs. new tax regimes, compute GST tax breakdowns, and estimate loan EMI amortization schedules.
Income Tax Calculator
Calculate Indian income tax for AY 2026-27 (FY 2025-26), compare Old vs New Tax Regime, view tax slabs, standard deductions, 87A rebate, and estimated savings.
GST Calculator
Calculate GST amount, pre-tax net price, gross price, and CGST/SGST/IGST tax breakdowns.
EMI Calculator
Calculate monthly loan installments, total interest, and full amortization schedule.
Percentage, Unit Conversion & Scientific Math
3 toolsCalculate percentage increases, convert SI and imperial units, and solve complex trigonometric and logarithmic equations.
Percentage Calculator
Calculate percentages, percentage change, percentage difference, and fraction to percent conversions.
Unit Converter
Convert units of length, weight, temperature, area, volume, speed, time, data storage, pressure, energy, and power.
Scientific Calculator
Advanced precision mathematical calculator with trigonometry, logarithms, powers, roots, constants, and calculation history.
Health Metrics & Date Arithmetic
2 toolsCalculate exact Body Mass Index (BMI) against WHO classifications and compute precise age in years, months, days, and hours.
Recommended Calculators Workflows
Personal Tax & Take-Home Salary Planning
Compare Old vs. New tax regime liabilities, calculate GST invoices, and determine exact percentage deductions from gross income.
Home Loan & Debt Amortization Analysis
Estimate monthly loan repayments, compute interest savings from prepayment percentages, and verify compound math.
Health & Milestone Date Assessment
Evaluate WHO Body Mass Index categories, calculate exact age intervals, and convert metric/imperial measurements.
Related Technical Guides
How EMI Calculation Works: Formula & Amortization
Understand the mathematical reducing-balance formula behind Equated Monthly Installments (EMIs), interest compounding, and repayment schedules.
Read Technical Guide →Calculators Frequently Asked Questions
Are the tax and financial calculator formulas updated for the latest fiscal year?
Yes. The Income Tax Calculator incorporates current Union Budget tax slabs and Section 87A rebate rules for AY 2026-27 under both Old and New tax regimes.
Is my confidential salary, loan, or health data stored on a server?
No. All calculations operate entirely inside your web browser memory using synchronous JavaScript mathematical algorithms. No numbers or inputs are ever logged, tracked, or uploaded.
Does the EMI calculator provide a complete month-by-month amortization schedule?
Yes. The Loan EMI Calculator displays the full year-by-year and month-by-month amortization breakdown of principal paid, interest charged, and remaining loan balance.
What functions does the Scientific Calculator support?
The Scientific Calculator supports standard arithmetic, trigonometry (sin, cos, tan, arcsin, arccos, arctan) in both Degrees and Radians, logarithms (log10, ln), powers, roots, factorials, and constants (pi, e).
How is Body Mass Index (BMI) calculated?
BMI is calculated using the standard WHO formula: weight in kilograms divided by the square of height in meters (kg/m2). The tool classifies results into Underweight, Normal weight, Overweight, and Obese categories.