Everyday Financial and Mathematical Calculators
Make informed decisions on home loans, recurring investments, GST taxes, compound interest, and percentage variations. Compute accurate amortisation schedules and financial projections privately without submitting your personal finances to lead-generation brokers.
Private Financial Calculations Without Lead-Gen Tracking
Most online financial calculators are operated by loan aggregators, banks, or lead-generation agencies. When you type in loan amounts, salary estimates, or investment figures, your inputs and IP address are frequently collected, profiled, and sold to financial telemarketers.
OnDevice Tools provides pure mathematical calculators that execute 100% on your device. Your loan principals, interest rates, tenures, and investment goals stay entirely in your browser tab. We have no backend database and no lead-capture forms.
Mathematically Rigorous Financial Models
Our EMI calculator uses the exact standard annuity formulation to project monthly payments and generate month-by-month amortisation schedules. The SIP and Compound Interest calculators compute compounding frequency yields with precision, allowing instant comparison across investment horizons.
Recommended Workflows
Planning a Home or Personal Loan
- Enter principal amount, annual interest rate, and repayment tenure in the EMI Calculator.
- Review the monthly instalment, total interest payable, and the total cost of the loan.
- Inspect the month-by-month amortisation schedule to see how your balance reduces over time.
Evaluating Systematic Investment Returns (SIP)
- Input your monthly investment amount, expected annual return rate, and investment tenure in the SIP Calculator.
- Instantly view your total invested capital versus total wealth created through compounding.
Frequently Asked Questions
Are the financial calculations legally binding?
No. They provide mathematical projections based on standard formulas. Real-world financial products may include institution-specific processing fees, taxes, insurance, or daily-reducing interest variations.
Does anyone see the financial figures I enter?
No. All calculations run strictly in your browser using JavaScript arithmetic. Nothing is sent over the network.
What is the formula for loan EMI calculation?
EMI = P × r × (1 + r)^n / ((1 + r)^n - 1), where P is principal, r is the monthly interest rate, and n is the tenure in months.