Calculation formula for DB and power

In wireless communication, often hear such a device how many db, in fact, refers to the power, because the power is linear change, not easy to remember and calculate, then use the DB to represent, the complete unit is dbm, is multiplied.

Calculation formulas for dbm and power

1. The underlying values need to be remembered and then calculated based on this. Example: 0DBM=1MW,1W=1000MW

2.DBM increases by 3, the power increases by 1 time times the need to multiply 2;dbm 10, power increase 10 times times the need to multiply by 10, reducing the exact opposite.

3. You can also find a corresponding table of power units MW and dbm, but it is easy to forget it even if you remember it. A schedule at the end is available for reference.

Let's look at the calculation method:

1DBM=1.3MW 1DBM=0+10-3-3-3=10MW/2/2/2≈1.3MW

2DBM=1.6MW 2DBM=0+10+10-3-3-3-3-3-3=10X10/2/2/2/2/2/2≈1.6MW

3DBM=2MW 3DBM=0+3=1X2=2MW

4DBM=2.5MW 4DBM=0+10-3-3=10MW/2/2=2.5MW

11DBM=13MW 11DBM=10+10-3-3-3=10X10/2/2/2≈13MW

24DBM=250MW 24DBM=10+10+10-3-3=10X10X10/2/2=250MW

And so on, but some calculations may not be the same as the corresponding table, you need to round the same.

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Calculation formula for DB and power