Q:

# What are the little lines on a ruler?

A:

The little lines on a metric ruler mark the millimeters between centimeters, while the little lines on an English ruler mark the eighths and 16ths between inches. Some English rulers may only have lines at every 1/2 inch or 1/4 inch.

Know More

## Keep Learning

To measure using a metric ruler, a person counts the number of marks after the last full centimeter measured. For example, if six marks are counted after centimeter 2, then the measurement taken is 2.6 centimeters.

An English ruler requires knowledge of the different fractions. Every inch is marked by a larger line and a number. The 1/2 inch is the center line between two set inches, and the 1/4 inch is the center line between two set 1/2 inches. The smallest lines are typically an 1/8 inch or 1/16 inch. Example measurements on an English ruler include 4 1/2, 6 3/8 and 9 7/16.

Sources:

## Related Questions

• A:

An easy way to convert centimeters to millimeters is to use the formula mm = cm/0.10000. Both are metric units of measurement, and a centimeter is one-hundredth of a meter, or 1/100, and a millimeter is one-thousandth of a meter, or 1/1000.

Filed Under:
• A:

Any quantity that is in centimeters can be converted into millimeters by dividing the quantity by .1. This is because there a 1,000 millimeters in a meter, but 100 centimeters in a meter as well, making the conversion of these related metric units a simple process.

Filed Under:
• A:

Read the length of an object by counting the whole-inch markers in between the ruler's zero-inch line and the object's end and then measuring the fraction of the last inch by counting the remaining small increments. English rulers are typically divided into fourths, eighths, 16ths and occasionally 32nds.