## Contents

### Time Calculator

- ･Between Two Times The elapsed time is calculated at the start time and the finish time.
- ･Add or Subtract Time The time after the elapsed time from the start time and the elapsed time is calculated.
- ･Add or Subtract Date The date and time is calculated from the start date and time and the elapsed time.
- ･Between Two Dates The elapsed time is calculated at the start date and the end date.
- ･Time Conversion Convert Day hour minute second to Days conversion, Hours conversion, Minutes conversion, Seconds conversion.
- ･Convert hours, minutes, seconds to "Hour, minute, and second" Convert Hour, Minute, and Second to Hour, minute, and second format.
- ･Time addition and subtraction Calculates addition and subtraction of multiple times.
- ･Stopwatch Time is measured with the stopwatch.
- ･Countdown (specified time) The countdown is calculated at the specified time.
- ･Countdown (specified times of day) Time until the specified time will count down.

### Date Calculator

- ･Number of Days Calculator Days are calculated at the start date and the end date.
- ･Date Calculator The date after (before) specified days is calculated from the start date and the number of days.
- ･Day of week calculator The day of the week is calculated at the specified date.
- ･Age Calculator The age is calculated at the birthday and the date.

### Calendar Calculator

- ･Christian era and japanese calendar conversion table Displays the conversion table between the Western calendar and the Japanese calendar.
- ･Age Chart About the point, it is an age list every born year in specified year.
- ･Admission and graduation year calculator The list of entrance and graduation year calculated by date of birth is displayed.
- ･Zodiac Calculator Year sexagenary cycle, the moon sexagenary cycle of one month, and the day sexagenary cycle are displayed from the specified year and month.
- ･Old calendar conversion table The conversion table of the old calendar of one month is displayed from the specified year and month.
- ･Calculate the 72 divisions of the solar year The 72 divisions of the solar year is displayed for one month from specified year.
- ･Calculate the 24 divisions of the solar year The 24 divisions of the solar year is displayed for one month from specified year.
- ･Calculate the age of the moon The age of the moon is displayed from the specified year and month.
- ･Calculate the 28 mansions of Chinese astronomy The 28 mansions of Chinese astronomy is displayed from the specified year and month.
- ･Calculate the 12 words used to mark the old calendar The 12 words used to mark the old calendar is displayed from the specified year and month.

### Health Calculator

- ･Calculation of basal metabolic rate (BMR) Calculate your basal metabolic rate (BMR) from your gender, age, height and weight.
- ･Calculate basal metabolic rate (from weight and body fat percentage) Calculate your basal metabolic rate (BMR) from your weight and body fat percentage.
- ･Calculation of total daily energy expenditure (TDEE) Calculate total daily energy expenditure (TDEE) from gender, age, height, weight and activity level.
- ･Calculate BMI Calculate BMI from height and weight.
- ･BMI and height From height, weight is calculated from BMI for each degree of obesity.
- ･Calculation of infant obesity (Kaup index) The degree of obesity in infants from 3 months to 5 years old is calculated from height and weight using the Kaup index.
- ･Calculation of the degree of obesity (Laurell index) of children and students Calculate the degree of obesity of a child/student using the Laurel index from height and weight.
- ･Calculation of beauty weight and Cinderella weight From height, standard weight, beauty weight, Cinderella weight, and model weight are calculated.
- ･Compare adult height and weight Compare adult gender, age, height, and weight with the national average.
- ･Compare child's height and weight Compare the child's gender, age, height, and weight with the national average.
- ･Child height predictor Calculate the child's predicted height from the father's and mother's heights.
- ･Calculation of weeks of pregnancy (from the first day of the last menstrual period) Calculates the number of weeks of pregnancy for a specified date from the date of the last menstrual period.
- ･Calculation of weeks of pregnancy (from due date) Calculate the number of weeks of pregnancy for a given date from the due date.
- ･Due date calculator Calculate the expected number of days to give birth from the date of the last menstrual period.
- ･Baby blood type predictor Predicts the probability of a baby's blood type based on the blood types of the parents and grandparents.
- ･Blood pressure determination calculation It determines whether you have high blood pressure based on your systolic and diastolic blood pressure.
- ･Discomfort index calculator Calculate the discomfort index from temperature and humidity.
- ･Body Surface Area (BSA) Calculator Body surface area is calculated from height and weight using the Du Bois, Shintani, and Fujimoto formulas.
- ･Estimated Vital Capacity Calculator Calculate expected estimated vital capacity from gender, age and height.

### Money Calculator

- ･Consumption Tax Calculator Calculate the consumption tax and tax-included amount from the tax-excluded amount and tax rate.
- ･Calculate tax excluded from tax included Calculates the tax-exclusive amount and consumption tax amount from the tax-inclusive amount.
- ･Calculate total consumption tax Calculate the product total and tax-inclusive amount from the amounts and tax rates of multiple products.
- ･Daily Rate Calculator Calculate the pro-rated amount per day and the total number of days from the monthly amount and period.
- ･Daily Salary Calculator Daily wage is calculated from start and end time and hourly wage.
- ･Calculate monthly salary from hourly wage Calculate daily wage, monthly wage, etc. from hourly wage, working hours, and number of working days.
- ･Calculates hourly wage from daily wage Calculates hourly wage, monthly wage, etc. from daily wage, working hours, and number of working days.
- ･Calculate hourly wage from monthly salary Calculates hourly wage, daily wage, etc. from monthly salary, working hours, and number of working days.
- ･Calculate hourly wage from annual income Calculate hourly wage, daily wage, etc. from annual income, working hours, and working days.
- ･Overtime Pay Calculator Extra overtime pay for overtime work is calculated from the hourly wage and working hours.
- ･Overtime Pay Calculator(late night, holiday) Calculate overtime pay by entering hours by type, such as late night or holidays.

### Biorhythm Calculator

- ･Biorhythm Calculate and display the biorhythm from the date of birth.
- ･Biorhythm compatibility Biorhythm compatibility is calculated and displayed at my and other party's date of birth.

### Convert character

- ･URL Encode Converts the entered characters by URL encoding.
- ･URL Decode Converts URL-encoded characters with URL decoding.
- ･Convert the character into the character entity reference Converts the entered character to a character entity reference.
- ･Convert the character entity reference into the character. Converts the entered character entity reference to characters.
- ･Convert character to numeric character reference Converts an input character to a numeric character reference.
- ･Convert numeric character reference to character Converts the input numeric character reference to character.
- ･Count the number of characters The number of characters and the number of bytes in the entered character string are counted and displayed.
- ･Convert full-width <--> half-width Converts double-byte characters, double-byte kana, double-byte spaces, etc. to half-width characters.
- ･Converte to Hiragana <--> Katakana Mutually convert full-width hiragana and katakana to half-width.
- ･Convert uppercase <--> lowercase Converts uppercase letters to lowercase letters and lowercase letters to uppercase letters.
- ･Convert space Deletes full-width and half-width spaces, and converts from full-width to half-width.
- ･Convert new line Delete line breaks, convert to half-width spaces, and convert to HTML tags.

### Unit Converter

- ･Convert length Converts the unit of length.
- ･Convert weight Converts the unit of weight.
- ･Convert area Converts the unit of area.
- ･Convert volume Converts the unit of volume.
- ･Convert angle Converts the unit of angle.
- ･Convert time Converts the unit of time.
- ･Convert speed Converts the unit of speed.
- ･Convert temperature Converts the unit of temperature.
- ･Convert power Converts the unit of power.
- ･Convert pressure Converts the unit of pressure.
- ･Convert acceleration Converts the unit of acceleration.
- ･Convert energy Converts the unit of energy.
- ･Convert data storage Convert the unit of Data Storage.

### Average Calculator

- ･Average calculation Calculates and obtains the average value of the input data.
- ･Median calculation Calculates and obtains the median of the entered data.
- ･Mode calculation Calculates and obtains the mode of the input data.

### Map Calculator

- ･Calculate straight line distance A straight line distance from the departure point to the destination point is calculated.
- ･Area Calculator The area of the part enclosed in the specified point on the map is calculated.

### Random Number Calculator

- ･Generate random numbers Random numbers are calculated and generated from the range and the number.
- ･Generate random numbers(Decimal) Random numbers including the decimal are calculated and generated from the range and the number.
- ･Random sort The order of the figure within the specified range is permuted at random.
- ･Groups it at random The figure within the specified range is grouped at random.
- ･Password Generator Random password of arbitrary number of characters are generated.

### Permutation and Combination Calculator

- ･Permutation Calculator Calculate the total number of ways to arrange r items selected from n items.
- ･Permutation Calculator(With Repetition) Calculate the total number of ways to arrange n items by selecting r items and allowing repetition.
- ･Combination Calculator Calculate the total number of combinations by selecting r items from n items.
- ･Combination Calculator(With Repetition) Calculate the total number of combinations by selecting r items from n items, allowing repetition.
- ･Circular Permutation Calculator Calculate the total number of ways to arrange n objects in a circle.

### Probability Calculator

- ･Dice Probability The probability that it throws a dice and a specific number goes out is calculated.
- ･Probability of sum of dice It throws some dices, and the probability of the sum is calculated.
- ･Coin Probability Probability that the specified number of times the coin toss, leave the table is calculated.
- ･Probability of drop item The acquisition probability of the drop item is calculated from the drop rate.
- ･Probability of winning in gacha Calculate the acquisition probability from the appearance rate of gacha and the number of trials.
- ･Number of times to hit with gacha Calculate the required number of attempts from the appearance rate of gacha and the probability you want to win.
- ･Probability of complete When you draw a specified number of times Gacha, the probability of completion is calculated.
- ･Probability of lottery The probability of hitting is calculated from the amount of money and the winning probability of the number of sheets of purchase of the lottery and the hit.
- ･Probability of continuously win The probability of continuously win is displayed by the list when drawing lots about a specific probability.

### Area Calculator

- ･Area of an equilateral triangle Calculate the area of an equilateral triangle by specifying the length of one side.
- ･Area of triangle (base and height) Calculate the area of the triangle from the base and height.
- ･Area of triangle (angle between two sides) Calculate the area of the triangle from the angle between the two sides.
- ･Area of triangle (angle of one side and both ends) Calculate the area of a triangle from the angles of one side and both ends.
- ･Area of triangle (length of 3 sides) Calculate the area of the triangle from the length of the three sides.
- ･Area of a square Calculate the area of a square from the length of one side.
- ･Area of rectangle Calculate the area of the rectangle from the vertical and horizontal lengths.
- ･Area of trapezoid Calculate the area of the trapezoid from the top, bottom, and height using the formula.
- ･Area of rhombus Calculate the area of the rhombus from the length of the diagonal.
- ･Area of parallelogram (base and height) Calculate the area of a parallelogram from the base and height.
- ･Area of parallelogram (angle between two sides) Calculate the area of a parallelogram from the two sides and the angle between them.
- ･Area of quadrilateral (4 sides and sum of opposite angles) Calculate the area of a quadrilateral from the length of four sides and the sum of opposite angles.
- ･Area of a circle Calculate the area of the circle and the perimeter from the radius.
- ･Area of fan shape Calculate the area of the sector, the length of the arc, and the length of the chord from the radius and central angle.
- ･Area of bow shape Calculate the area of the bow, the length of the arc, and the length of the chord from the radius and central angle.

### Volume Calculator

- ･Volume and surface area of cube Calculate the volume and surface area of a cube from the length of one side.
- ･Calculate one side from the volume of the cube Calculate the length and surface area of one side of a cube from the volume.
- ･Calculate the length of one side of cube given surface area Calculate the length and volume of one side of a cube from the surface area.
- ･Volume and surface area of rectangular parallelepiped Calculate the volume and surface area of a rectangular cuboid from the length of one side.
- ･One side and surface area of a rectangular parallelepiped Calculate the length and surface area of one side of a rectangular cuboid from the volume.
- ･One side and volume of a rectangular parallelepiped Calculate the length and volume of one side of a rectangular cuboid from the surface area.
- ･Volume and surface area of regular tetrahedron Calculate the volume and surface area of a regular tetrahedron from the length of one side.
- ･Calculate one side from the volume of a regular tetrahedron Calculate the length and surface area of one side of a regular tetrahedron from the volume.
- ･Calculate one side from the surface area of a regular tetrahedron Calculate the length and volume of one side of a regular tetrahedron from the surface area.
- ･Regular quadrangular pyramid (base and height) Calculate the volume and surface area of a regular quadrangular pyramid from the base and height.
- ･Regular quadrangular pyramid (bottom and hypotenuse) Calculate the volume and surface area of a regular quadrangular pyramid from the base and hypotenuse.
- ･Volume and surface area of cylinder Calculate the volume and surface area of a cylinder from the base radius and height.
- ･Volume and surface area of circular cone Calculate the volume and surface area of a cone from the base radius and height.
- ･Volume and surface area of sphere Calculate the volume and surface area of a sphere from its radius.
- ･Radius of sphere given volume Calculate the radius and surface area of a sphere from its volume.
- ･Radius of sphere given surface Calculate the radius and volume of a sphere from its surface area.

### Triangle Calculator

- ･Equilateral triangle (height and area from side) Calculate the height and area from the length of one side of an equilateral triangle.
- ･Equilateral triangle (height to side and area) Calculate the length and area of one side from the height of an equilateral triangle.
- ･Equilateral triangle (area to side and height) Calculate the length and height of one side from the area of an equilateral triangle.
- ･Right triangle (base and height) From the base and height of a right triangle, calculate the hypotenuse, angle, and area.
- ･Right triangle (base and hypotenuse) Calculate the height, angle, and area from the base and hypotenuse of a right triangle.
- ･Right triangle (base and angle) Calculate the height, hypotenuse, and area from the base and angle of a right triangle.
- ･Right triangle (height and hypotenuse) Calculate the base, angle, and area from the height and hypotenuse of a right triangle.
- ･Right triangle (height and angle) Calculate the base, hypotenuse, and area from the height and angle of a right triangle.
- ･Right triangle (hypotenuse and angle) Calculate the base, height, and area from the hypotenuse and angle of a right triangle.
- ･Trigonometric function from angle Calculate trigonometric functions from angles (degrees or radians).
- ･From trigonometric function to angle (inverse trigonometric function) The angle is calculated from trigonometric function. (Inverse trigonometric function)
- ･Convert trigonometric function Trigonometric function is calculated and converted.

### Decimal and Fraction Calculator

- ･Decimal to Fraction Converts the input decimal into a fraction.
- ･Repeating Decimal to Fraction Converts the input repeating decimal into a fraction.
- ･Decimal to Percentage Converts the entered decimal number into a percentage.
- ･Fraction to Decimal Converts the entered fraction into a decimal.
- ･Fraction to Percentage Converts the entered fraction into a percentage.
- ･Improper Fraction to Mixed Fraction Converts the input improper fraction into a mixed fraction.
- ･Mixed Fraction to Improper Fraction Converts the input mixed number into an improper fraction.
- ･Simplify Fractions Reduces the entered fraction to a simpler fraction.
- ･Convert to a common denominator Converts the input fractions into a common denominator, making them fractions with the same denominator.

### Calculate divisor and multiple

- ･Prime factorization The value entered is the prime factorization.
- ･Greatest common divisor (two numbers) Greatest common divisor of two numbers is calculated.
- ･Greatest common divisor (three numbers) The greatest common divisor of three numbers is calculated.
- ･Divisor Divisors of the values entered are calculated.
- ･Common divisor (two numbers) Common divisor of two numbers is calculated.
- ･Common divisor (three numbers) Common divisor of three numbers is calculated.
- ･Least common multiple (two numbers) Least common multiple of two numbers is calculated.
- ･Least common multiple (three numbers) Least common multiple of three numbers is calculated.
- ･Common multiple (two numbers) Common multiple of two numbers is calculated.
- ･Common multiple (three numbers) Calculate the common multiple of three numbers.

### Ratio Calculator

- ･Percentage Calculator Calculate the X percent of a certain number or the percentage of a value.
- ･Percentage Increase Calculator Calculate how many percentages have increased, how many percentages have increased, and so on.
- ･Percentage Decrease Calculator Calculates the X percent decrease of a number, or how many percent decrease, etc.

### Calculate progression

- ･Arithmetic progression The term of nth is calculated from the first term and common difference specified in the arithmetic progression.
- ･Sum of arithmetic progression The sum of the arithmetic progression is calculated from the first term and the common difference and the range.
- ･Geometric progression The term of nth is calculated from the first term and the common ratio specified in geometric progression.
- ･Sum of eometric progression Calculates the sum of geometric series from the specified first term, common ratio and range.
- ･Fibonacci sequence Nth term is calculated in the Fibonacci sequence.
- ･The sum of the progression (pa^2+qa+r) Calculate the sum of progression whose recurrence relation is pa^2+qa+r.

### Base Converter

- ･Binary/Octal/Decimal/hexadecimal converter You can convert between binary, octal, decimal, and hexadecimal numbers, and check the calculation process.
- ･Base n converter Converts base n numbers from binary to 36 base numbers to another base number and displays it.
- ･Base number conversion table You can display a list of mutually converted binary, octal, decimal, and hexadecimal numbers within any range.
- ･ASCII code converter You can convert text to and from ASCII codes such as binary, decimal, and hexadecimal numbers.