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Watts (W) and dBm (decibel milliwatts) are units used to measure power, particularly in the context of electrical signals and radiofrequency (RF) communications.
Watts are the standard unit of power in the International System of Units (SI). They represent the absolute power level of an electrical signal or device. One watt is equal to one joule of energy transferred per second.
dBm is a logarithmic unit used to express power levels in relation to one milliwatt (mW). It is commonly used in RF communications and signal strength measurements.
dBm = 10 . log10(P / 0.001)
| Power (W) | Power (dBm) |
| 0 W | not defined |
| 0+ W | -∞ dBm |
| 0.00001 W | -20 dBm |
| 0.0001 W | -10 dBm |
| 0.001 W | 0 dBm |
| 0.01 W | 10 dBm |
| 0.1 W | 20 dBm |
| 1 W | 30 dBm |
| 10 W | 40 dBm |
| 100 W | 50 dBm |
| 1000 W | 60 dBm |
| 10000 W | 70 dBm |
| 100000 W | 80 dBm |
| 1000000 W | 90 dBm |
To convert watts (W) to dBm, you can use the formula: dBm = 10 * log10(P / 1 mW), where P is the power in watts. dBm represents power levels in decibels relative to 1 milliwatt (mW).
1 dBm is equal to approximately 0.001 watts (1 milliwatt). It is a logarithmic unit used to express power levels in decibels referenced to 1 milliwatt.
To convert decibels (dB) to watts, you can use the formula: P (W) = 10^(dB / 10), where P is the power in watts and dB is the decibel value.
200 mW is equivalent to +23 dBm. To convert from milliwatts to dBm, use the formula in question 1.
1 mW of power is equal to 0 dBm. dBm is a logarithmic scale, and 0 dBm represents 1 milliwatt.
dBm is calculated by taking the logarithm of the ratio of the power level (in watts) to 1 milliwatt and then multiplying the result by 10. The formula is: dBm = 10 * log10(P / 1 mW), where P is the power in watts.
20 dBm represents a power level of 100 milliwatts (mW). It indicates that the power is 100 times greater than 1 milliwatt, as dBm is a logarithmic scale.
dBm strength is a measure of the power level of a signal or electrical transmission in decibels relative to 1 milliwatt. It provides a convenient way to express signal strength in various communication systems.
A decibel (dB) is a unitless ratio and does not directly represent a power level. It is used to compare two power levels on a logarithmic scale. To convert dB to watts, you need to know the reference power level. Use the formula: P (W) = 10^(dB / 10), where P is the power in watts and dB is the decibel value relative to the reference power.