Free calculates software for pda

Tip Calculator Lite easilly calculates meal tips and total check amount using only 4K of palm memory. Freeware.

Palm Easter Calculator is a freeware program that calculates when Easter Sunday and other related dates fall for a given year.
System requirements:
- Palm III
- Palm OS v3.0

Calculates and displays the appropriate daf for any day from now through the end of the cycle in 2012 / 5773.

PPM Calculator is a database that calculates the amount of chemical necessary to maintain a desired level in Parts Per Million in an irrigation system of a vineyard or orchard. The user enters the field data, number of drip emitters per vine, the gallons per hour of the drip emitters, the type of chemical, percent concentration, the target PPM level and the number of hours to maintain the target level PPM. The database then calculates the total amount of chemical required and the injection rate in gallons per hour and gallons per minute.
I found this calculator to be especially useful when determining the amount of liquid chlorine to inject into an irrigation system to combat algae which can severly plug emitters. The data from each calculation is stored in a table allowing easy reference.
System requirements:
- HanDBase v.2.7x or greater

YCalc by Yuxi Li calculates the average of 12 numbers.

Note: Currently average will not work with less than 12 numbers.

Developed for Palm using NS Basic . This is Freeware available for all to enjoy. Application calculates various Telescope optical design values, also has a glossary of terms.

TipCalc 1.0 is regarded as a distinguished and tractable application which calculates the tip at a restaurant, with a minimum of keystrokes. You simply enter the total cost of the meal, and it shows you the tip and the total amount of money to leave on the table. You select the tip percentage you wish to use (e.g. 15%) from a list of percentages.

Calculates the leak rate for a vacuum chamber, in Torr. Enter the vacuum readings in Torr (power of 10 separate, minus assumed, default to 4), set the start and end times (which can be anything from 1 second to 1 hour+) and get the 1 hour leak rate. Results are in Torr (resolution defaults to 10-3 Torr (microns) and can be changed) and Microns.