Free Online Calculators
Browse the full library of free calculators, or search and filter by category to find exactly what you need.
Age Calculator
Calculate exact age in years, months, and days from a birth date.
Calculate →Annuity Calculator
Calculate the future value of a series of equal payments (an annuity).
Calculate →Backsplash Tile Calculator
The Backsplash Tile Calculator tells you how many tiles you need for a kitchen or bathroom backsplash, based on its length, height,…
Calculate →Binomial Probability Calculator
The Binomial Probability Calculator finds the probability of getting exactly a certain number of successes across a fixed number of independent trials.…
Calculate →BMI Calculator
Calculate your Body Mass Index (BMI) from height and weight.
Calculate →BMR Calculator
Calculate your Basal Metabolic Rate (calories burned at rest).
Calculate →Break-Even Calculator
Find out how many units you need to sell to break even.
Calculate →Brick Calculator
The Brick Calculator tells you how many bricks you need for a wall, accounting for mortar joints and waste. Simply fill in…
Calculate →Calorie Calculator
Estimate your daily calorie needs to maintain, lose, or gain weight.
Calculate →Carpet Calculator
Calculate how much carpet you need, in square feet and square yards.
Calculate →Cat Weight Calculator
Check whether your cat's weight falls in a healthy range.
Calculate →Ceiling Tile Calculator
The Ceiling Tile Calculator tells you how many drop ceiling tiles you need for a room, based on its size and the…
Calculate →Cement Block Calculator
The Cement Block Calculator tells you how many concrete or cinder blocks you need for a wall, accounting for mortar joints and…
Calculate →College Admission Simulator
The College Admission Simulator estimates your overall application strength by combining GPA, test scores, extracurricular involvement, and essay quality into a single…
Calculate →College Chance Calculator
The College Chance Calculator gives a rough estimate of your admission chances by comparing your GPA and SAT score against a school’s…
Calculate →Compound Interest Calculator
Calculate how your savings or investment grows with compound interest.
Calculate →Concrete Calculator
Calculate how many cubic yards of concrete you need for a slab.
Calculate →Credit Card Payoff Calculator
The Credit Card Payoff Calculator tells you how many months it will take to pay off a balance, and how much interest…
Calculate →Cross Stitch Calculator
The Cross Stitch Calculator tells you what size fabric you need for a cross stitch design, based on the stitch count and…
Calculate →Date Calculator
Calculate the number of days, weeks, months, and years between two dates.
Calculate →Discount Calculator
Calculate the final price after a percentage discount.
Calculate →Dog Age Calculator
Convert your dog's age into human years, adjusted for breed size.
Calculate →Dog Weight Calculator
Check whether your dog's weight falls in a healthy range for its size category.
Calculate →Drywall Calculator
The Drywall Calculator tells you how many sheets of drywall you need for a room, based on wall dimensions and sheet size.…
Calculate →ERA Calculator
The ERA Calculator finds a pitcher’s Earned Run Average, the standard measure of how many earned runs a pitcher allows per full…
Calculate →EV Charging Cost Calculator
Estimate the cost to charge your electric vehicle.
Calculate →Exponential Growth Calculator
The Exponential Growth Calculator finds the final value of a quantity that grows by a fixed percentage each period. Simply fill in…
Calculate →Flooring Calculator
Calculate how much flooring material you need, including waste allowance.
Calculate →Freelance Rate Calculator
Work out the hourly rate you need to charge to hit your income goal.
Calculate →FTP Calculator
The FTP Calculator estimates your cycling Functional Threshold Power from a 20-minute time trial test, and breaks it down into training power…
Calculate →Future Value Calculator
Calculate the future value of an investment with optional regular contributions.
Calculate →GCF Calculator
Find the greatest common factor (GCF) of two or more numbers.
Calculate →Gravel Calculator
Estimate how many tons or cubic yards of gravel you need.
Calculate →Gross Profit Calculator
Calculate gross profit and gross margin from revenue and cost of goods sold.
Calculate →Hours Calculator
Calculate total hours worked between a start and end time, minus breaks.
Calculate →How Long Will My Money Last Calculator
The How Long Will My Money Last Calculator tells you how many months or years your savings will last, based on a…
Calculate →Ideal Weight Calculator
Estimate a healthy ideal body weight range using the Hamwi method.
Calculate →Investment Calculator
Project the future value of an investment with regular contributions.
Calculate →LCM Calculator
Find the least common multiple (LCM) of two or more numbers.
Calculate →Loan Calculator
Calculate the monthly payment for any fixed-rate loan.
Calculate →Macro Calculator
Calculate your daily calorie needs and macronutrient split (protein, carbs, fat).
Calculate →Markup Calculator
Calculate selling price and profit from cost and markup percentage.
Calculate →Mean, Median and Mode Calculator
Calculate the mean, median, mode, and range of a data set.
Calculate →Mortgage Calculator
Calculate your estimated monthly mortgage payment.
Calculate →OPS Calculator
The OPS Calculator finds a batter’s OPS (On-base Plus Slugging), a widely used combined measure of getting on base and hitting for…
Calculate →Overtime Calculator
Calculate overtime pay from hourly rate and overtime hours worked.
Calculate →Overtime Pay Calculator
Calculate total pay for a week including regular and overtime hours.
Calculate →Paint Calculator
Estimate how many gallons of paint you need for a room or wall.
Calculate →Parabola Calculator
The Parabola Calculator finds the vertex, axis of symmetry, and direction of a parabola from its equation y = ax² + bx…
Calculate →Percentage Calculator
Calculate what one number is as a percentage of another, or find a percentage of a value.
Calculate →Pipe Size Calculator
The Pipe Size Calculator estimates the minimum pipe diameter needed for a given flow rate and target velocity, and recommends the nearest…
Calculate →Pipe Velocity Calculator
The Pipe Velocity Calculator finds how fast water (or another fluid) is flowing inside a pipe, based on the flow rate and…
Calculate →Pipe Volume Calculator
The Pipe Volume Calculator finds the internal volume of a pipe, in cubic feet and gallons, based on its diameter and length.…
Calculate →Pipe Weight Calculator
The Pipe Weight Calculator estimates the weight of a length of pipe, based on its diameter, wall thickness, and material density. Simply…
Calculate →Projectile Motion Calculator
The Projectile Motion Calculator finds the range, maximum height, and time of flight of an object launched at an angle. Simply fill…
Calculate →Proportion Calculator
Solve a proportion a/b = c/x for the missing value.
Calculate →Protein Calculator
Estimate your daily protein needs based on body weight and activity level.
Calculate →Puppy Weight Calculator
Estimate your puppy's adult weight based on current weight, age, and expected adult size.
Calculate →Quadratic Formula Calculator
Solve for x in ax² + bx + c = 0 using the quadratic formula.
Calculate →Reflection Calculator
The Reflection Calculator finds the coordinates of a point after it’s reflected across the x-axis, y-axis, origin, or the line y =…
Calculate →Rise Over Run Calculator
The Rise Over Run Calculator finds the slope of a line or surface as a ratio, percentage, and angle, from a rise…
Calculate →ROI Calculator
Calculate return on investment (ROI) as a percentage.
Calculate →Roof Pitch Calculator
The Roof Pitch Calculator helps you find your roof’s pitch, angle, and rafter length using either a rise-and-run measurement or a known…
Calculate →Roofing Calculator
Calculate roofing squares needed based on roof size and pitch.
Calculate →Room Size Calculator
Calculate the area and perimeter of a room.
Calculate →Salary Calculator
Convert an hourly wage into weekly, monthly, and annual salary.
Calculate →Salary Increase Calculator
Calculate your new salary after a percentage raise.
Calculate →Sand Calculator
Calculate how much sand you need by volume and weight.
Calculate →Savings Goal Calculator
Find out how many months it will take to reach your savings goal.
Calculate →Share Incentive Plan Calculator
The Share Incentive Plan Calculator estimates the future value of your contributions to a workplace share plan, including any employer matching shares.…
Calculate →Sheetrock Calculator
The Sheetrock Calculator tells you how many sheets you need for a room, based on wall dimensions and sheet size. Simply fill…
Calculate →Shower Tile Calculator
The Shower Tile Calculator tells you how many tiles you need for a shower or bathroom enclosure, based on wall length, height,…
Calculate →Square Foot Calculator
Calculate the area of a space in square feet.
Calculate →Stairs Calculator
The Stairs Calculator tells you how many steps you need, the exact riser height, and total horizontal run for a staircase, based…
Calculate →Steps to Miles Calculator
Convert your step count into miles walked.
Calculate →Tile Calculator
Find out how many tiles you need for a floor or wall.
Calculate →Tile Installation Cost Calculator
The Tile Installation Cost Calculator estimates the total material and labor cost of a tiling project, based on area, tile price, and…
Calculate →Time Average Calculator
The Time Average Calculator finds the time-weighted average of a set of values, each held for a different duration. Simply fill in…
Calculate →Unit Converter
Convert between units of length, weight, volume, and temperature.
Calculate →VOO Calculator
The VOO Calculator projects the future value of an investment in VOO (Vanguard S&P 500 ETF), with optional monthly contributions and an…
Calculate →Wallpaper Calculator
Calculate how many wallpaper rolls you need for a room.
Calculate →WHIP Calculator
The WHIP Calculator finds a pitcher’s WHIP (Walks plus Hits per Inning Pitched), one of the most common measures of how many…
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