How our calculators work
Each tool turns the values you enter into a result using a defined formula or conversion rule. The result is only as useful as the inputs and assumptions behind it.
1. You enter the inputs
Enter values in the units and formats requested by the calculator. Check whether amounts are monthly or annual, rates are percentages or decimals, and periods are expressed in months or years. Where the tool offers dates, confirm the date range is sensible.
2. The calculator applies a formula
Each calculator page includes an explanation and, where relevant, a formula. Examples include percentage = part ÷ whole × 100; profit margin = profit ÷ selling price × 100; and a standard reducing-balance EMI formula based on principal, monthly interest rate and number of payments. Conversion tools use the relationship between the selected units.
3. The result is an estimate under stated assumptions
Some tools use simplified models. For instance, a loan estimate may assume a fixed rate and regular monthly payments; a deposit or SIP projection may assume a constant rate of growth. Actual products can use different compounding, timing, fee, tax or rounding rules. Read the relevant calculator page for its specific assumptions.
4. Review before acting
Try a second input set or compare the result with a trusted example. If the result will affect a loan, investment, tax filing, payroll or business decision, verify it independently using current official information or the institution’s own documents.
Browser processing and recent history
The calculations in this static build are performed in your browser. The homepage’s Recent feature can store a short result summary locally in browser storage. See the Privacy Policy for details.
Temporary test build · Last reviewed: 9 October 2026