Browse our complete collection of 50+ free online calculators. Click any card to use the tool.
Calculate your Body Mass Index instantly.
Find your Basal Metabolic Rate.
Find your ideal body weight range.
Estimate your body fat percentage.
Calculate your 1RM for any lift.
Find your target heart rate zone.
Calculate your running pace.
Enter your pre-pregnancy height and weight to find the recommended total weight gain range during pregnancy, based on IOM guidelines.
Estimate your likely conception date based on either your last menstrual period or your due date.
Calculate body fat percentage using the US Army circumference method based on neck, waist, height and (for women) hip measurements.
Calculate your lean body mass (muscle, bone, organs — everything except fat) using the Boer formula.
Calculate your recommended daily protein intake based on your body weight and activity or fitness goal.
Calculate your recommended daily fat intake range in grams based on your total daily calorie needs.
Predict your upcoming period dates and estimated fertile window based on your last period and average cycle length.
Estimate your Glomerular Filtration Rate (GFR), a measure of kidney function, using the MDRD formula. This is informational only — always consult a doctor for medical decisions.
Estimate your general body type (somatotype) — ectomorph, mesomorph, or endomorph — based on your wrist circumference relative to your height.
Calculate your Body Surface Area (BSA) using the Mosteller formula, commonly used in medicine for drug dosing and clinical assessments.
Estimate blood alcohol content (BAC) using the Widmark formula. This is an educational estimate only — actual BAC varies by individual, and you should never drive after drinking regardless of the result.
Find out your BMI category and how much weight you would need to lose to reach the normal BMI range.
Calculate your Indian income tax liability.
Break down your CTC into take-home salary.
See how much money lands in your bank.
Calculate MGNREGA wages.
Estimate estate tax liability.
Calculate your car loan EMI.
Compare lease vs buy.
Decide between cash back or low-interest loan.
Calculate monthly home loan EMI.
How much house can you afford?
Full loan repayment schedule.
Simple and compound interest.
Calculate monthly EMI instantly.
Calculate GST for any product.
Find out how much tax gets added.
How much will you save?
Calculate the monthly EMI, total interest paid, and total payment for any type of loan.
Estimate the retirement corpus you need to maintain your lifestyle, based on current monthly expenses, inflation, and expected investment returns.
Calculate the future value of your investment, including an initial lumpsum plus optional regular monthly contributions.
Calculate how inflation affects the value of money over time — see the future equivalent of an amount, or how much purchasing power is lost.
Calculate exactly how much you need to save each month to reach a specific financial goal by a target date.
Estimate the retirement corpus built from regular monthly contributions, and the monthly pension payout it can generate.
Calculate the fixed monthly payout you can withdraw from a lumpsum investment over a chosen number of years.
Find out how many months it will take to pay off your credit card balance with a fixed monthly payment, and the total interest you will pay.
Enter up to three debts to see how long it takes to pay them all off using the avalanche method (highest interest rate first), plus total interest paid.
Calculate the monthly EMI and total interest for an education loan, with an optional moratorium (grace) period.
Calculate the maturity value of a one-time lumpsum mutual fund investment based on expected annual returns.
Calculate the monthly EMI, total interest, and total repayment amount for a personal loan.
Compare the total financial outcome of renting versus buying a home over a chosen number of years.
Calculate the present value of a future sum of money, discounted at a given rate — a core time value of money concept.
Calculate the future value of a present sum of money, plus optional regular monthly contributions, at a given growth rate.
Calculate the total return and annualized return on any investment, given the initial amount, final value, and holding period.
Full scientific calculator.
Find X% of any number.
Add, subtract, multiply fractions.
Add, multiply matrices.
Arithmetic with large numbers.
Round to decimal places.
Find all factors.
Greatest Common Factor.
Least Common Multiple.
Square root, cube root.
Logarithm with any base.
Solve quadratic equations.
Simplify ratios.
Calculate powers.
Calculate percentage error.
Generate random numbers.
Hexadecimal arithmetic.
Binary arithmetic.
Enter the three side lengths of a triangle to calculate all angles, area, perimeter, and classify the triangle type.
Enter any two known sides (two legs, or one leg and the hypotenuse) to find the missing side, both acute angles, and the area.
Enter any one known value of a circle and instantly get the radius, diameter, circumference, and area.
Enter any two sides of a right triangle (two legs, or one leg and the hypotenuse) to instantly find the missing side using the Pythagorean theorem.
Calculate the remaining quantity of a substance after a given time, based on its half-life, using exponential decay.
Convert any decimal number to scientific notation, or convert a coefficient and exponent back into a standard decimal number.
Enter any positive integer to break it down into its prime factors, shown both as a factor tree list and in exponent form.
Enter a list of numbers separated by commas to instantly calculate the mean, median, mode, range, and other basic statistics.
Calculate the z-score (standard score) for a value given the population mean and standard deviation, along with its percentile rank.
Calculate the minimum sample size needed for a survey or study, based on confidence level, margin of error, and population size.
Calculate the confidence interval for a sample mean, given the standard deviation, sample size, and desired confidence level.
Enter the coordinates of two points to find the straight-line distance, midpoint, and slope between them.
Select a 3D shape and enter its dimensions to calculate surface area and volume instantly.
Enter a dividend and divisor to instantly find the quotient, remainder, and full decimal division result.
Enter a z-score (test statistic) to calculate the left-tail, right-tail, and two-tail p-values for hypothesis testing.
Enter at least 3 terms of a sequence to detect whether it is arithmetic or geometric, and find any term you need.
Split the bill and calculate tip.
Split any bill fairly between friends.
Calculate exact age.
How much free time do you have?
Convert between currencies.
Add or subtract days, weeks, months, or years from any date to find the resulting date instantly.
Calculate the total hours and minutes between a start time and end time, including overnight shifts that cross midnight.
Calculate your weighted Grade Point Average (GPA) from up to 5 courses, using grade points and credit hours.
Calculate your final weighted grade from up to 5 assignment or exam scores, each with its own weight percentage.
Convert height between centimeters and feet/inches instantly in either direction.
Find out exactly how many days remain until a future date, or how many days have passed since a past date.
Instantly find out what day of the week any date falls on, whether in the past or the future.
Calculate the square footage (area) of any rectangular room or space, useful for flooring, paint, or carpet estimates.
Calculate the volume of concrete needed for a slab, footing, or wall, along with an estimated number of concrete bags.
Calculate the total fuel cost for a trip based on distance, your vehicle mileage, and current fuel price.
Calculate your vehicle fuel efficiency (mileage) based on distance traveled and fuel consumed.
Roll any number of virtual dice with any number of sides — perfect for games, decisions, or random selection.
Calculate speed, distance, or time — enter any two values and find the third.
Calculate density, mass, or volume — enter any two values and find the third using the density formula.
Convert weight instantly between kilograms, pounds, ounces, and grams.
Calculate the number of tiles needed to cover a room, including a wastage allowance for cuts and breakage.