Fed up of trying to calculate freefall times? Well, let your browser do it for you. Enter your exit and deployment altitudes in the form below. Adjust your terminal velocity, if required, and click "Calc".
Fed up of trying to add up your freefall times? Well, let your browser do this for you as well. Click "Jump" to add the freefall time above to the list below. A running total is kept at the bottom. If you have cookies enabled then your browser will remember the jump list so you can use it as an online log (Remember: The data is stored in a cookie on your computer so you can only see it again if you use the same browser on the same computer, with the same profile and you haven't deleted all your cookies).
Warning: This is an example of an idea. My maths has not been validated, it has not been tested on a range of browsers and it may do strange things if you enter strange numbers.