Get simple and easy instructions to make a sundial using common household materials. Discover how a sundial works.

# Measurement

See how to calculate the number of hours in a year, the number of working hours in a year, and the amount of free time.

## How Many Hours in a Year?

Find out how many minutes are in a day. Compare the number of minutes in a solar day versus a sidereal day and see why there is a difference.

## How Many Minutes in a Day? Easy Time Conversion

Convert nm to m or nanometers to meters using this simple conversion. Don't be afraid of the exponents. Here's what you do!

## nm to m – Nanometers to Meters Conversion

Learn how much 12 oz of water weighs in ounces, pounds, and grams. See why the calculation isn't as simple as you might think.

## How Much Does 12 oz of Water Weigh?

Learn about latitude and longitude and how they represent a location on Earth. See how to read coordinates in this coordinate system.

## Latitude and Longitude

Get the pressure definition in science. See its units and get example of pressure and how to calculate it.

## Pressure Definition in Science

Learn how to convert days to years by two easy methods. See an example unit conversion and a table of values.

## How to Convert Days to Years

See how to convert ounces to grams in an easy one-step conversion. Or, just see a table of ounce to gram conversions.