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CalcMate

Financial & Math Calculators

Interest and everyday maths calculators. Useful alongside the loan and investment tools when you are comparing a deposit, a discount or a rate.

Simple Interest CalculatorCalculate simple interest on any principal for any rate and period, with the interest and the total payable or receivable in Indian rupees.Compound Interest CalculatorCalculate compound interest with yearly, half-yearly, quarterly or monthly compounding, and see the year-by-year growth in Indian rupees.Percentage CalculatorCalculate what percent one number is of another, a percentage of a value, percentage change, and increases or decreases, with Indian formatting.Average CalculatorPaste or type a list of numbers to get the mean, median, mode, sum, range, minimum and maximum instantly, with Indian number formatting.

Which financial & math calculators should you use?

These are the general-purpose tools that sit behind the loan and investment calculators. They answer the arithmetic questions that come up when you are comparing a deposit, checking a discount, or trying to understand what a quoted rate means.

The distinction that matters most is between simple interest, which is charged on the original amount only, and compound interest, which is charged on the interest already added. Over a few years the gap becomes substantial, which is why bank deposits quote a compounding frequency and short-term lenders quote a flat rate.

Percentage Calculator covers five relationships at once, including the one people get wrong: a 20% fall followed by a 20% rise does not bring you back to where you started. Average Calculator reports the median and mode alongside the mean, which matters whenever a few extreme values would drag the average around.

For borrowing questions specifically, Loan Interest applies reducing-balance interest rather than the simple or compound formulas here. For deposits, FD and PPF apply each scheme's own convention, which is not the textbook one.

Also useful here

These belong to another category, but people reach for them from this one.

Flat vs Reducing Rate CalculatorCompare a flat interest rate against a reducing-balance rate on the same loan in India, and see the reducing rate a flat quote actually equals.FD CalculatorCalculate the maturity value and interest on a fixed deposit in India, with quarterly, monthly, half-yearly or yearly compounding and a payout option.PPF CalculatorCalculate PPF maturity value in India using the official lowest-balance rule, with the deposit date that decides whether a month earns interest at all.

Reviewed by Pradipta Ray, Editor · Last updated