About & methodology
MoneyMetric builds simple, accurate financial calculators for people making real decisions about loans and investments. Our aim is to show not only the answer but how it is reached, so you can check it and understand the trade-offs.
Our principles
- Transparent formulas. Every calculator page shows the formula it uses and a worked example.
- Tested calculations. Calculation logic is separate from the interface and covered by automated tests against published reference values and edge cases. Results can never show invalid values such as negative EMIs.
- No guesswork presented as fact. Where a figure depends on local rules, such as state stamp duty, we ask you to enter it rather than assume a rate that might be outdated.
- Privacy. Calculations run in your browser. See our privacy page.
Methodology
Loan EMI
Loans use the reducing-balance method with monthly compounding: EMI = P × r × (1 + r)n ÷ [(1 + r)n − 1], with r = annual rate ÷ 12 ÷ 100. Amortization schedules apply each month's interest to the outstanding balance, and the final instalment is adjusted so the balance ends at exactly zero.
SIP future value
SIPs are modelled as monthly investments made at the start of each month, compounding at the expected annual return ÷ 12: FV = P × [(1 + i)n − 1] ÷ i × (1 + i). Returns are assumptions, not forecasts.
Home loan
The loan amount is the property price minus the down payment. LTV is the loan amount ÷ the property price. The loan-to-value check uses RBI's general slabs and is informational only.
Rounding
Calculations use full precision internally. Results are displayed rounded to the nearest rupee, with the exact EMI shown to the paisa. Lenders may round differently.
Limitations
Results are estimates. They do not include fees, taxes, insurance, rate resets or broken-period interest unless stated. Read our full disclaimer.
Contact
Questions, corrections or suggestions? Call us at +91 97597 90159.