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Every calculator on the site, listed by category. (68 calculators)

General

CalculatorA free calculator with percentages, parentheses and full keyboard support.
Percentage CalculatorEnter two numbers and get every common percentage answer at once.
Discount CalculatorEnter the price and discount to see exactly what you pay and how much you save.
Tip CalculatorEnter the bill and tip percentage to see what each person owes.

Ratio CalculatorEnter three values to find the fourth — the unknown in the proportion.
Area CalculatorChoose a shape and enter its dimensions to get the area and perimeter.
Volume CalculatorChoose a solid and enter its dimensions to get the volume, surface area and litres.
Distance Formula CalculatorEnter the coordinates of two points to get the distance, midpoint and slope.
Exponent CalculatorEnter a base and an exponent to get the power, its root and scientific notation.
Log CalculatorEnter a number and choose a base to get its logarithm.
Quadratic Formula CalculatorEnter the coefficients a, b and c to get the roots and the discriminant.
LCM and GCF CalculatorEnter your numbers to get their greatest common factor, least common multiple and prime factors.
Probability CalculatorEnter the probability of two events to see the chance of both, either or neither.

Hourly Rate CalculatorConvert your monthly salary into hourly, daily and annual pay.

Loan CalculatorCalculate the monthly payment and full repayment schedule for any fixed-rate loan.

VAT CalculatorEnter an amount and a rate to get net, gross and VAT amounts together.

Profit Margin CalculatorGet your gross profit, margin and markup from cost and selling price in seconds.
Markup CalculatorAdd your markup to cost and see your selling price — before and after tax.
Break-Even CalculatorFind out how many units you need to sell to cover all your costs.
Pallet Loading CalculatorEnter your carton size to see how many fit per pallet, in how many layers, with a layout plan.
Container Pallet CalculatorChoose the vehicle and pallet type to see how many pallets fit, the weight limit and the floor plan.
Container Loading CalculatorEnter the carton size to see how many load loose into the vehicle and how much of the volume is used.
Bulk Cargo CalculatorChoose the material and vehicle to see the loadable tonnage by volume and by weight.
Currency ConverterEnter an amount and choose the currencies to see the value at the central bank rate.
Photo Box CounterUpload a photo of the pallet and tap the cartons to get the total number of cartons and items.

Compound Interest CalculatorSee how regular saving and compounding grow your money over time.
ROI CalculatorMeasure how much an investment, campaign or project really earned.
CAGR CalculatorFind the average yearly growth rate of revenue, investments or users.
Savings CalculatorEnter what you can put aside each month and see what you will have years from now.
Simple Interest CalculatorEnter the principal, the rate and the term to see how much interest accrues.
Annuity CalculatorEnter your lump sum, the rate of return and the term to see how much you can draw each month.
Retirement CalculatorEnter your age and monthly contribution to see how much you will have when you retire.
Inflation CalculatorEnter an amount, an inflation rate and a number of years to see what your money will buy.
Car Depreciation CalculatorEnter the car’s value and depreciation rates to see what it will be worth in a few years.

BMI CalculatorEnter your height and weight to see your body mass index and the healthy weight range for your height.
Ideal Weight CalculatorChoose your sex and enter your height to see your ideal weight from four well-known formulas.
Body Fat CalculatorAll you need is a tape measure: enter your neck and waist to estimate your body fat percentage.
Calorie CalculatorHow many calories should you eat a day? See what it takes to maintain, lose or gain weight.
Protein CalculatorEnter your weight and pick your goal to see how many grams of protein you need a day.
Water Intake CalculatorEnter your weight and daily exercise to see how much water you should drink a day.
Calories Burned CalculatorPick an activity, enter your weight and the duration to see how many calories you burned.
Heart Rate CalculatorEnter your age and resting heart rate to see the heart rate range to train in.
Pace CalculatorEnter the distance you ran and your time to see your pace and race predictions.
Due Date CalculatorEnter the first day of your last period to see your estimated due date and how far along you are.
Sleep CalculatorEnter the time you need to wake up and see when to go to bed to wake feeling rested.

Age CalculatorPick your date of birth to see your exact age in years, months and days.
Days CalculatorPick two dates to see the number of days, weeks and working days between them.
Date CalculatorPick a date and enter how much time to add; see the date it lands on.
Week CalculatorPick a date to see which week and day of the year it falls on.
Time CalculatorEnter a start and end time to see the duration in hours and minutes.
Time Zone ConverterEnter a time and choose two cities to see what time it is on the other side.

Unit ConverterChoose what to convert and enter a value to see it in every unit at once.
Length ConverterEnter a value and pick the units to convert between inches, centimetres, feet, metres, miles and kilometres.
Weight ConverterEnter a value and pick the units to convert between kilograms, pounds, ounces and grams.
Temperature ConverterEnter a temperature to see it in Celsius, Fahrenheit and Kelvin.
Area Unit ConverterEnter a value to convert between square metres, square feet, acres and hectares.
Volume Unit ConverterEnter a value to convert between litres, gallons, millilitres and cups.
Speed ConverterEnter a speed to convert between km/h, mph, metres per second and knots.
Data Size ConverterEnter a value to convert between megabytes, gigabytes, terabytes and bytes.

Online AbacusSlide the beads to count, and learn tens and ones, addition and subtraction step by step.

Number Link PuzzleJoin each pair of matching numbers with a line; lines must not cross and no cell may stay empty. No sign-up, plays in your browser.
Falling Blocks GameSlide and turn the falling blocks to build rows without gaps. Every full row clears and scores points.
Maze Chase GameSteer the red ball through the maze, collect every dot and clear the level without being caught by the four chasers.
Sliding Puzzle (15 Puzzle)Slide tiles into the empty square and arrange the numbers in order from 1. Every shuffled board can be solved.