PRACTICAL TOOLS
Calculators that show their work.
These small tools are for estimates and learning. Each calculator explains the formula, the assumptions and where the result can differ from a real bill, lender quote or account statement.
Appliance Electricity Cost
Estimate energy use from wattage, hours and an electricity rate.
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Loan EMI Calculator
Calculate an illustrative monthly EMI from principal, annual rate and term.
Open calculator →Simple Interest Calculator
Calculate simple interest and maturity value from the principal, rate and time.
Open calculator →How to use them
Use a calculator as a starting point, not as a promise.
Real-world costs and financial outcomes can include taxes, fees, slab rates, lender-specific methods, changing rates, billing rules and rounding. The result here is the mathematical output from the numbers you enter.
For important decisions, compare the result with the current terms published by the relevant provider or authority.