This day calculator counts the number of days between two dates. It does not include the last day, so, there is 1 day between today and tomorrow, not 2.

This calculator helps you calculate how many hours between two days, for example, between Monday 8 a.m and Wednesday, 6 p.m.

This online calculator calculates how many months are there between two dates.

This week calculator determines the number of weeks between the first date and second date.

The calculator evaluates number of working days and holidays for a period of time. The calculator based on the U.S. federal holidays table recognised in most states.

The cache calculator gives the volume and weight of the cache in a currency.

This calculator determines how much time, in days, hours, minutes and seconds, elapsed between the first date and the second date

Th calculator converts the html table code to JSON array with optional data transpose and compression. It also visualizes numeric data on chart.

This online calculator generates Huffman coding based on a set of symbols and their probabilities. A brief description of Huffman coding is below the calculator.

This online calculator calculates the humidification requirements for your space by determining the volume of air to be humidified and the amount of water to be added per hour, helping you choose the right humidifier.

This calculator calculates Humindex, index used by Canadian meteorologists to describe how hot the weather feels to the average person, by combining the effect of heat and humidity.

This online calculator can solve hydrostatic pressure problems by finding unknown values in the hydrostatic equation.

Calculation of hyperbolic functions

This calculator calculates hypergeometric distribution pdf, cdf, mean and variance for given parameters

This calculator calculates the check digit from the other digits/alphabetic characters in the entered series. The calculation is done according to the algorithm used by ICAO for machine readable travel documents. The description of the algorithm can be found below the calculator.

The Body Mass Index (BMI) calculator is used to calculate the ideal weight of an individual based on their height and weight.

Ideal weight calculator using Paul Broca formula

The calculator counts the number of colors in an image, finds the dominant color, and creates a table of colors that make up the original image.

This calculator allows you to perform simple image manipulation tasks online.

The calculators below convert units of length from Metric to Imperial and from Imperial to Metric and display results as fractional values and as composite values.