verb (used with object) 1. to determine or ascertain by mathematical methods; compute: to calculate the velocity of light.
http://dictionary.reference.com/search?q=Calculate&r=66

Calculate and compare rates for your mailing by size, shape, weight, ZIP Code and, optionally, foreign country.
http://www.usps.com/tools/calculatepostage/

i.e. calculate the area of a circle Choose a category to begin: Area; Volume ... Other Resources: AirNinja.com offers a comprehensive list of the routes flown by ...
http://www.calculateme.com/

The Calculate category of Apple's web apps library. ... About iCalc - Tip Calculator This simple and effective iPhone Tip Calculator is great for when you are dining out and want ...
http://www.apple.com/webapps/calculate/

Calculate the Value of Your Paper Savings Bond(s)
http://wwws.publicdebt.treas.gov/BC/SBCPrice