All calculators

30 calculators, each with its formula, a worked example and tested results. More are added only once they pass the same checks.

Finance

EMI CalculatorCalculate the EMI for a home, car or personal loan from the amount, interest rate and tenure.
Mortgage CalculatorEstimate your monthly mortgage payment from the home price, down payment, rate and term, including property tax and insurance, with a balance chart.
Compound Interest CalculatorSee how money grows with compound interest.
Simple Interest CalculatorCalculate simple interest from principal, rate and time in years, months or days, with the I = P × R × T formula and an example.
SIP CalculatorEstimate the future value of a monthly SIP from the amount, expected annual return and period.
Savings Goal CalculatorFind the monthly amount you need to save to reach a goal by a date, taking into account money you already have and the interest it earns.
Loan Amortization CalculatorCreate a month-by-month amortization schedule showing how each loan payment splits into principal and interest, plus the remaining balance.
Inflation CalculatorEstimate what something will cost in future at a given inflation rate, and how much today’s money will be worth in real terms.

Percentage CalculatorFind a percentage of a number, what percent one number is of another, or the whole from a part and its percentage.
Percentage Change CalculatorCalculate the percentage increase or decrease from an original value to a new value, with the formula, an example and common mistakes explained.
Average CalculatorPaste a list of numbers to get the mean, median, mode, range, sum and count.
Ratio CalculatorSimplify a ratio to its lowest terms, express it as 1 : n, and scale it to find a missing value in a proportion such as 4 : 6 = 10 : x.
Fraction CalculatorAdd, subtract, multiply or divide two fractions and get the exact answer in lowest terms, as a mixed number and as a decimal.
Standard Deviation CalculatorCalculate sample or population standard deviation and variance from a list of numbers, with the formula and a worked example.

Profit Margin CalculatorCalculate gross profit margin from revenue and cost, and see the equivalent markup.
Markup CalculatorFind the selling price from a cost and markup percentage, plus the profit and the resulting profit margin.
Break-even CalculatorFind how many units you must sell to cover fixed costs, the break-even revenue and the contribution margin per unit.
ROI CalculatorCalculate return on investment from the amount invested and returned, and the annualized ROI (CAGR) when you enter a holding period.
Discount CalculatorCalculate the price after a percentage discount, how much you save, and the real effect of an extra discount stacked on top.
GST Calculator (India)Add GST to a price or extract GST from a GST-inclusive amount at current Indian rates (5%, 18%, 40% and special rates), with CGST, SGST and IGST split.
ROAS CalculatorCalculate return on ad spend from ad revenue and cost, your break-even ROAS from gross margin, and profit after advertising.

BMI CalculatorCalculate your body mass index from height and weight in metric or US units, see the WHO category and the healthy weight range for your height.
BMR CalculatorEstimate your basal metabolic rate and daily calorie needs at different activity levels using the Mifflin–St Jeor equation.

GPA CalculatorEnter letter grades and credit hours to calculate your grade point average on the common 4.0 scale, with total credits and quality points.
Percentage Grade CalculatorConvert marks scored out of a total into a percentage and a letter grade on a common scale, and see how many marks were lost.

Age CalculatorCalculate exact age from a date of birth in years, months and days, plus total months, weeks and days, and the days until the next birthday.
Date Difference CalculatorCount the days between two dates, with weeks, years-months-days and weekdays (Monday to Friday).

Length ConverterConvert length between metric and imperial units using exact definitions: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 mile = 1.609344 km.
Temperature ConverterConvert a temperature between Celsius, Fahrenheit and Kelvin at once, with the conversion formulas and a check against absolute zero.
Concrete CalculatorCalculate the concrete volume for a slab or round column in cubic metres, cubic feet and cubic yards, with a waste allowance and multiple pours.