Calculators

Mortgage calculator Monthly mortgage payment, total interest and 12-month amortization schedule. Pythagorean Theorem Find the hypotenuse or a leg of a right triangle, plus perimeter and area. GCF and LCM Greatest common factor and least common multiple with prime factorization steps. Square & cube root Square and cube roots, perfect squares and cubes, nearest perfect squares. Completion percentage What % of a goal you're at, with a bar. Salary to hourly wage Convert monthly or annual salary to hourly wage and back, by weekly hours.

3D print cost What a print really costs (and what to charge) Add hours and minutes Add several durations in hours:minutes format. Area & Perimeter Area and perimeter of square, rectangle, triangle, circle, trapezoid, rhombus. Aspect ratio The aspect ratio (16:9, 4:3…) from width and height. Combinations & Permutations Compute nCr and nPr, with or without repetition, exact results for huge numbers. Completion percentage What % of a goal you're at, with a bar. Compound interest Final balance, interest earned, and year-by-year growth with monthly deposits. Days lived How many days, weeks and months you've lived. Decimal to fraction Turn a decimal into its reduced fraction. Difference between two times Hours and minutes between a start and end time. Discount Calculator Find the sale price from a percent off, or the real discount from two prices. Electricity Cost See what an appliance costs to run: watts, hours and kWh price, per day and year. Factorial (n!) The factorial of a number, exact even for big numbers. Fibonacci sequence Generate the Fibonacci numbers, exact even when large. Fraction of a number How much a fraction (e.g. 3/4) of a number is. Fraction to decimal The decimal number equivalent to a fraction. GCF and LCM Greatest common factor and least common multiple with prime factorization steps. Hourly project cost Hours × hourly rate = project cost. Increase or decrease by % A value increased and decreased by a percentage. Least squares line Paste two columns of data and get the line, R squared, the chart and a prediction. Logarithm The logarithm of a number in any base. Margin and markup Margin, markup and profit from cost and selling price. Mean, Median & Mode Paste numbers to get mean, median, mode, min, max, sum and count instantly. Mortgage calculator Monthly mortgage payment, total interest and 12-month amortization schedule. Percentage calculator Find X% of a number, percent of a total, and percentage change between two values. Percentage change Increase or drop in % between a start and end value. Power A base raised to an exponent, even negative or decimal. Price per kg Compare value from price and weight. Prime factorization Factor any number into primes with exponents and step-by-step divisions. Prime numbers Check if a number is prime and list all primes up to 100,000. Pythagorean Theorem Find the hypotenuse or a leg of a right triangle, plus perimeter and area. Quadratic Equation Solver Solve ax² + bx + c = 0 with discriminant, real or complex roots and full steps. Road Trip Gas Cost Estimate road trip costs: miles, MPG, gas price and tolls, split per passenger. Round a number Round to as many decimals as you want. Rule of 72 Years to double your money at a given rate, with the exact math shown too. Rule of three (proportions) Solve direct and inverse proportions: A is to B as C is to X, with steps explained. Salary to hourly wage Convert monthly or annual salary to hourly wage and back, by weekly hours. Savings goal How much to save each month to reach your goal, with or without interest. Scientific calculator Write the whole expression, with brackets, powers, roots and sines, and see how it was read. Simple interest Interest and final balance from principal, rate, and time, formula explained. Simplify Fractions Reduce fractions to lowest terms with steps, plus add, subtract, multiply, divide. Speed, Time & Distance Enter any two of speed, time and distance to get the third, with running pace. Split into installments The amount of each installment from a total. Split the Bill Split a restaurant bill with tip and reduced shares for kids or the guest of honor. Square & cube root Square and cube roots, perfect squares and cubes, nearest perfect squares. Stacked discounts Final price after stacked discounts and the true total: 30% + 10% isn't 40% off. Standard Deviation Standard deviation and variance, population and sample, with formulas. Times table The multiplication table of a number from 1 to 10. Tip calculator Tip, total and share per person splitting the bill. University Grade Average Simple and weighted average of Italian 18–30 grades, plus base out of 110. VAT calculator Add or remove VAT with common European rates or a custom one. Instant results. Volume of solids Volume and surface area of cube, sphere, cylinder, cone, pyramid, and box. Work hours calculator Add up hours worked from clock-in, clock-out and breaks. Decimal hours too. Yearly subscription cost How much a monthly cost adds up to per year.