Financial Calculators
Free online calculators to help you make better financial decisions. 100% free & private.
Welcome to the SpendKeep Financial Calculators directory. Our tools are designed to help you analyze your investments, plan your retirement, manage your debt, and calculate your taxes—all without ever requiring you to link a bank account or share personal data. We believe in Financial Sovereignty, which means providing you with powerful analysis tools that run entirely in your web browser. Nothing is saved to our servers, ensuring your financial numbers remain strictly confidential.
Financial Sovereignty Tools
NEWSaaS Volatility Estimator
Calculate your annual SaaS capital waste from idle licences and headcount growth. No bank sync. Runs in-browser.
Privacy Risk Calculator
Quantify the attack surface created by linking bank accounts to aggregators like Plaid or Yodlee.
Financial Anxiety Calculators
NEWHidden Subscription Bleed Calculator
Find your Annual Ghost Spend — the total yearly cost of subscriptions you are paying for but never use. Built to create the "aha moment" that stops financial bleeding.
Daily Habit Cost Calculator
Calculate the total cash cost of your daily habits AND the lost investment opportunity at 7% annual return — the true Latte Factor over time.
Loan & EMI
EMI Calculator
Calculate monthly EMI for home, car, or personal loans
Mortgage Calculator
Estimate home loan payments including taxes and insurance
Debt Payoff Calculator
Find out how long it will take to become debt-free
Simple Interest Calculator
Calculate interest on loans and investments easily
Loan Comparison
Compare two loan offers side by side
Investment & Savings
SIP Calculator
Plan your mutual fund SIP investments
Lumpsum Calculator
Estimate returns on a one-time investment
Portfolio Analyser
AI-powered risk & return analysis for your stocks and mutual funds
Compound Interest
See how compounding grows your money
FD Calculator
Calculate fixed deposit maturity amount
PPF Calculator
Estimate Public Provident Fund maturity
Planning & Tax
Retirement Calculator
Plan how much you need to save for retirement
Inflation Calculator
See how inflation erodes your purchasing power
GST Calculator
Calculate GST with CGST, SGST & IGST breakdown
Gratuity Calculator
Estimate gratuity based on salary & service years
Salary Calculator
Convert CTC to in-hand salary with full breakdown
Why use SpendKeep Financial Tools?
Most online calculators exist to capture your email address or push you toward affiliate financial products. SpendKeep is different. Our platform is built on the philosophy of Financial Sovereignty. We provide these calculators completely free of charge to empower you to make data-driven financial decisions on your own terms.
100% Privacy-First Architecture
Every calculator on this page runs entirely locally in your browser using JavaScript. When you enter your salary, loan amount, or investment portfolio size, that data never leaves your device. We do not store your inputs, we do not track your financial net worth, and we certainly do not sell your data to third-party data brokers.
Accurate and Transparent
Whether you are calculating the long-term effects of a Systematic Investment Plan (SIP), estimating your home mortgage amortization schedule, or checking your income tax liability, our tools use standard financial formulas. We make it easy to see exactly where your money is going, how much you are losing to inflation, and how quickly compounding interest can work in your favor.
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