Financial Calculators
22 live calculators for loans, investing, savings, tax, retirement and business — each one showing the formula it uses, the substituted values and an exportable report.
Featured Calculators
EMI Calculator
Equated monthly instalment, total interest and a full year-by-year amortisation of any reducing-balance loan.
Open calculatorSIP Calculator
Future value of a monthly systematic investment plan with inflation-adjusted (real) corpus and yearly growth chart.
Open calculatorIncome Tax Calculator (India)
Old vs new regime side by side for FY 2025-26 with standard deduction, 80C/80D, rebate and cess.
Open calculatorGST Calculator
Add or remove GST at any slab with CGST, SGST and IGST split for intra- and inter-state supply.
Open calculatorLoans
EMI Calculator
Equated monthly instalment, total interest and a full year-by-year amortisation of any reducing-balance loan.
Open calculatorHome Loan Eligibility
Maximum loan a lender will sanction from your income, existing obligations, FOIR and the property LTV cap.
Open calculatorLoan Prepayment Savings
Interest saved and months cut by a lump-sum prepayment or a regular extra payment on your running loan.
Open calculatorCredit Card Payoff Calculator
How long a card balance takes to clear at a fixed monthly payment, and the cost of paying the minimum.
Open calculatorInvesting
SIP Calculator
Future value of a monthly systematic investment plan with inflation-adjusted (real) corpus and yearly growth chart.
Open calculatorStep-up SIP Calculator
SIP with an annual increase in contribution — the realistic way to invest as income grows.
Open calculatorLumpsum Investment Calculator
Future value of a one-time investment with compounding frequency and real (post-inflation) worth.
Open calculatorCAGR Calculator
Compound annual growth rate between any two values, with absolute return and doubling time.
Open calculatorSavings
Fixed Deposit (FD) Calculator
FD maturity value with quarterly, monthly or cumulative compounding, plus post-tax yield.
Open calculatorRecurring Deposit (RD) Calculator
Maturity value of a monthly recurring deposit with quarterly compounding, as banks compute it.
Open calculatorPPF Calculator
Public Provident Fund maturity over 15 years (extendable) with fully tax-free EEE returns.
Open calculatorCompound Interest Calculator
Compound growth of a principal with optional regular contributions and any compounding frequency.
Open calculatorSimple Interest Calculator
Interest and total amount on the flat simple-interest basis used for short-term and informal loans.
Open calculatorTax
GST Calculator
Add or remove GST at any slab with CGST, SGST and IGST split for intra- and inter-state supply.
Open calculatorIncome Tax Calculator (India)
Old vs new regime side by side for FY 2025-26 with standard deduction, 80C/80D, rebate and cess.
Open calculatorCapital Gains Tax Calculator
Short- and long-term capital gains tax on equity, debt, property and gold under the post-2024 rules.
Open calculatorTake-home Salary Calculator
CTC to in-hand salary with EPF, gratuity, professional tax and income tax under the new regime.
Open calculatorPlanning
SWP Calculator
Systematic withdrawal plan — how long a corpus lasts and what is left after regular withdrawals.
Open calculatorRetirement Corpus Calculator
Corpus needed at retirement and the monthly saving required to reach it, inflation-adjusted.
Open calculatorInflation Calculator
What today's money will be worth later, and what a future cost equals in today's terms.
Open calculatorBusiness
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About the Financial Suite
Money decisions deserve maths you can see. Every OneCalc financial tool prints the formula it uses, the assumptions behind it and a breakdown of principal, interest and tax, so the number is auditable rather than magical.
Loan tools use reducing-balance amortisation as RBI-regulated lenders do. Investment tools use annuity-due future values, matching how AMCs allot SIP units. Tax tools follow the Income Tax Act with FY 2025-26 slabs, the ₹75,000 standard deduction under the new regime and the post-July-2024 capital gains rates.
Calculations run entirely on your device — salary, loan and investment figures never leave the browser, and every result can be copied, printed or exported as a PDF report.
Frequently Asked Questions
Start with the most used tool
Work out an instalment in seconds, then explore the rest of the OneCalc platform.