Different units are often used to measure the same type of thing (for instance, length). Sometimes you want to convert to another unit, just to visualize the amount - for example, if you are accustomed to seeing lengths expressed in meters, you may have trouble understanding feet. Or perhaps the other way round. Also, when using formulae, units need to be compatible. As an example, in the formula commonly used for speed problems:
distance = speed x time
distance might be in meters, time in seconds, in which case speed must be in meters per second. If one of the units is incompatible, it must be converted first.
To answer that accurately, we will need to know the pairs of units.
In that case you need to divide the distance by the speed. Since the units are not compatible (miles versus km), you need to convert to compatible units first. For instance, convert the miles to kilometers.
To convert a weight measurement, you need to know the conversion factor. For example, to convert pounds to kilograms, you multiply the number of pounds by 0.45. To convert kilograms to pounds, divide the number of kilograms by 0.45. Use the appropriate conversion factor depending on the units you are converting between.
You need to know the linear density.
how many people are need to gave two units of blood?
i need to know a quick easy way to convert units of measurement
To answer that accurately, we will need to know the pairs of units.
You need to know the actual medicine to convert that, all Units are not the same.
We need to know to what you need to convert it.
You cannot equate weight directly with length. You need to know the shape and dimensions to find the volume. You then need to know the density and apply it. You also have to convert units after that.
You cannot directly associate weight or volume with length. In order to convert to volume you need to know the shape and most likely another 2 dimensions. This will get you the volume. You then need to know the density, usually in grams per millilitre. and apply this. Then convert the units.
You need to give us the units of the original measurement
don know
The units are incompatible and cannot be converted
You forgot to include the original unit in your question. You need that to be able to convert units.
In that case you need to divide the distance by the speed. Since the units are not compatible (miles versus km), you need to convert to compatible units first. For instance, convert the miles to kilometers.
To convert a weight measurement, you need to know the conversion factor. For example, to convert pounds to kilograms, you multiply the number of pounds by 0.45. To convert kilograms to pounds, divide the number of kilograms by 0.45. Use the appropriate conversion factor depending on the units you are converting between.