It makes no sense to mix up different systems of units.

Different systems of units used to be very common.

The above definitions are no longer the most commonly used in either system of units.

There are many different systems of units, so some conversions can be very complex.

Systems of units based on these are called natural units.

The resulting system of units is known as natural.

Only later did it become identified with a particular system of units used to weigh such merchandise.

This list catalogues coherent relationships in various systems of units.

The international system of units is a standard that is agreed on by most countries.

The 375-gram value is consistent with the system of units for measuring precious metals.

Or, in the system of units typically used by phone company people, they will carry 60,000 circuits on each fiber pair.

By convention even American Scientists use the metric system of units.

If everyone uses the same system of units, then there is less likelihood of mistakes.

A choice of units is called a system of units.

Think about countries that use or used a system of units different from the imperial or metric systems.

It is the world's most widely used system of units, both in everyday commerce and in science.

By the end of the war, Salmon had set up a complete system of units and procedures that was then the "world's best practice".

Dimensionless physical constants retain their values in any system of units.

The international System of Units does not allow to use suffixes or add symbols.

These constants cannot be eliminated by any choice of a system of units.

Packaged food weights and volumes may be given using any of the three systems of units.

Being a dimensionless quantity, it has constant numerical value in all systems of units.

From Babylon to now, the primary way systems of units spread is through trade; government fiat plays a secondary role.

While many countries have officially adopted SI, older system of units are still used.

The International System of Units does not propose one.