Free Online Calculators
Compute loan amortization schedules, mutual fund compounding returns, GST invoices, and percentages with mathematical accuracy. All calculations execute instantly in client-side JavaScript without transmitting your financial numbers over the network.
Which Calculator Do You Need?
Planning a Loan or Mortgage?
Determine your monthly payment and total interest liability using EMI Calculator with reducing-balance amortization formulas.
Open EMI CalculatorInvesting in Mutual Funds?
Project future wealth compounding and rupee-cost averaging across multi-year horizons using SIP Calculator.
Open SIP CalculatorInvoicing or Sales Tax?
Add tax to net prices or reverse-calculate GST components with GST Calculator, or compute margins with Percentage Calculator.
Open GST CalculatorAll Calculators
EMI Calculator
Calculate your Equated Monthly Installment (EMI) for home, car, or personal loans with complete interest breakdowns.
SIP Calculator
Calculate projected wealth growth and returns on your Systematic Investment Plan (SIP) mutual funds.
GST Calculator
Calculate Goods and Services Tax (GST) easily for tax-inclusive and tax-exclusive amounts.
Percentage Calculator
Calculate percentage values, percentage increase and decrease, and ratios with instant precision.
Age Calculator
Calculate your exact age in years, months, and days with leap year handling and target date selection.
Mathematical Formulas & Computational Logic
| Calculator | Underlying Mathematical Formula | Primary Application |
|---|---|---|
| EMI Calculator | EMI = [P × r × (1+r)^n] / [(1+r)^n - 1] | Home, auto, and personal loan monthly payment planning |
| SIP Calculator | M = P × [((1+i)^n - 1) / i] × (1+i) | Mutual fund monthly compounding wealth growth simulation |
| GST Calculator | Add: Base × (1 + r); Remove: Gross / (1 + r) | Sales tax invoicing and CGST/SGST itemized breakdown |
| Percentage Calculator | Change = [(New - Old) / Old] × 100 | Retail discounts, profit margins, and growth metrics |
Financial Calculation Frequently Asked Questions
Are these calculations considered financial advice?
No. All calculators provide mathematical estimates based on user-entered values for informational and planning purposes. Actual lender amortization schedules, tax laws, and mutual fund market performance may differ.
Are my salary or loan numbers saved anywhere?
No. All equations execute in your local browser sandbox memory. No loan amounts, investment sums, or personal financial details are sent over the internet or logged on any server.
How Equated Monthly Installment (EMI) is Calculated
Understand the standard reducing-balance loan formula, principal versus interest distribution curves, and prepayment impacts.