Convert PX to REM. 16px = 1rem

Multiplies slider value by 3. The round the value

Find the perimeter and the area of a circle

p = 2πr
a = πr²

Take the number input and adjust the size of text

Calculates the area of a room by multiplying 2 sliders

Calculates a rooms wall area by multiplying perimeter length by wall height and displays it to 2 decimal places

More sliders for paint properties

Calculates the required number of cans of paint based on Pi calc and sliders above

All the above Pi's in one Pi

Using a function to display months based on the slider value

Multiple Pi's with functions that generate values used in other Pi's to produce a day based on 3 select boxes.

Taken from https://en.wikipedia.org/wiki/Zeller%27s_congruence

Where:

• h is the day of the week (0 = Saturday, 1 = Sunday, 2 = Monday, ..., 6 = Friday)
• q is the day of the month
• m is the month (3 = March, 4 = April, 5 = May, ..., 14 = February)
• K the year of the century unless its Jan or Feb then its year -1
• J is the zero-based century (actually ) For example, the zero-based centuries for 1995 and 2000 are 19 and 20 respectively (to not be confused with the common ordinal century enumeration which indicates 20th for both cases).

Manipulating CSS on this page via Pi

Time zone example that gives the date/time of others around the world to plan a meeting

Calculates the difference between 2 date pickers and displays it in days, hours and seconds

Calculate the payment on a loan

Future value of an cashflow based on growth rate

Output a HTML list of items chosen in the form.