Free Online Calculators

Fast, accurate calculators that run entirely in your browser — instant results, private, no uploads.

• Age CalculatorFind your exact age in years, months and days — plus total days, weeks and mon…
• Average CalculatorFind the mean, median and mode of any list of numbers — instantly and privatel…
• BMI CalculatorCalculate your Body Mass Index and see your healthy-weight range, instantly an…
• Calorie CalculatorFind your maintenance calorie needs using the Mifflin-St Jeor equation, based …
• Compound Interest CalculatorSee how an investment or loan grows with compound interest over time using the…
• Date Difference CalculatorCount the days, weeks, months and years between two dates — with an optional b…
• Discount CalculatorWork out the sale price and how much you save — including stacked discounts.
• EMI CalculatorWork out your monthly loan payment, total interest and total payable. Enter yo…
• Fraction CalculatorAdd, subtract, multiply and divide fractions and get a simplified answer — ins…
• GPA CalculatorCompute your weighted grade point average on a standard 4.0 scale. List your c…
• Income Tax CalculatorEstimate your income tax and take-home pay from your annual income and a tax r…
• Mortgage CalculatorEstimate your monthly mortgage payment (EMI) and total interest for any loan a…
• Percentage CalculatorFind a percent of a number, what percent one number is of another, or percenta…
• Quadratic Equation SolverSolve an equation of the form ax² + bx + c = 0 and find its roots, with the di…
• Ratio CalculatorScale a ratio A:B by a factor and see the equivalent and simplified ratio.
• Salary CalculatorConvert between an hourly rate and an annual salary. Pick a direction, enter y…
• Sales Tax CalculatorAdd a sales tax rate to an amount and instantly see the tax charged and the to…
• Scientific CalculatorA full scientific calculator — trigonometry, logarithms, powers, roots, pi and…
• Simple Interest CalculatorFind the simple interest and total amount for any principal, rate and time — i…
• Square Root CalculatorFind the square root of any number, or compute any other root like a cube root…
• Standard Deviation CalculatorFind the standard deviation, variance and mean of any data set — for a populat…
• Tip CalculatorWork out the tip and split the bill evenly between friends — in your browser, …
• Water Intake CalculatorEstimate your daily water needs from your weight — shown in litres and in glas…
• GST CalculatorFree online GST calculator for India. Add GST to a price or remove GST from an i…
• ROI CalculatorFree online ROI calculator for India. Enter your initial investment and final va…