Measurement & Time

Page Updated June 2022 .

A Walk Through Time  The history of time measurement. This site leads us from the ancient world right up to the present day.

Calendars through the Ages  Web site depicts the "fascinating history of the human endeavor to organize our lives in accordance with the sun and stars." Gives an overview and specifics of the basis of calendars through the ages.

Make a Customized Calendar  Either leave this form as is, or start pushing buttons and see the wide variety of custom calendars you can make.

Math for the Toolbox. SAE to Metric Conversion  A Math Table to convert inches to millimeters from SOS Math.

Measurements  These pages teach measurement operations covered in K8 math courses. Each page has an explanation, interactive practice and challenge games about measurements.

Metric Conversion Tables  Convert anything into metric units! Calculate minutes into hours, miles into kilometers, and hours into days. Keep this site open for continual reference.

Online Conversion  Learn how to convert all different types of things.

POPClock Projection  A daily update of the U.S. population by the U.S. Census Bureau. For more information go to the U.S. Census Home Page.

Rosetta Calendar  A calendar converter. It displays the same date in multiple calendar systems. It converts between the Gregorian, Julian and Hebrew calendars.

U.S. Official Time  If you want to know exactly what time it is in the U.S. you can find out here.

Units of Conversion  A math table on linear measure, square measure and cubic measure from SOS Math.