Conversions
Power Converter
Switch among common power units—including logarithmic dBm—while the tool handles all of the math in the background.
Convert between Watts, kilowatts, horsepower, and dBm.
Power relationships
Linear units scale directly (1 kW = 1,000 W, 1 hp = 745.7 W). dBm references 1 mW so P(watts) = 10^{(dBm−30)/10}.
How to use
- Enter the value and pick the unit (W, kW, MW, hp, or dBm).
- The calculator converts to watts internally and displays the rest, including dBm.
- Copy the format that matches your application.
Example
Input: Value = 37 dBm
Output: ≈ 5 W, 0.005 kW, 0.0067 hp
Student-friendly breakdown
This walkthrough emphasizes the most searched ideas for Power Converter: Power Converter. Start with the formula above, then follow the guided steps to double-check your work. For quick revision, highlight the givens, plug into the equation, and finish by verifying your units.
Need more support? Use the links below to open the long-form guide, browse additional examples, or hop into adjacent calculators within the same topic — each one is a quick way to double-check your work or handle a related question without starting from scratch.
Deep dive & study plan
Power Converter: Converts Watts, kilowatts, megawatts, horsepower, and dBm. It's built around power, watts, dbm, so you can go from a raw question to a checked answer without switching tools.
The math behind it: Linear units scale directly (1 kW = 1,000 W, 1 hp = 745.7 W). dBm references 1 mW so P(watts) = 10^{(dBm−30)/10}.
To use it well: (1) Enter the value and pick the unit (W, kW, MW, hp, or dBm). (2) The calculator converts to watts internally and displays the rest, including dBm. (3) Copy the format that matches your application. Keep your units consistent as you go, and re-run a case you already know the answer to — it's the fastest way to catch a typo before it throws off a result you're relying on.
Worked example: entering Value = 37 dBm returns ≈ 5 W, 0.005 kW, 0.0067 hp. Try swapping in your own numbers next, especially a case you're unsure about, before you use this for something that matters.
Quick retention checklist
- Speak the formula aloud (or annotate it) so the relationships stick.
- Write each step in your own words and compare with the numbered list above.
- Swap in new numbers for the Example to make sure the calculator (and your logic) handles edge cases.
- Check at least one related calculator below — it's the fastest way to confirm your numbers still line up from a different angle.
FAQ & notes
Why does dBm require positive watt values?
dBm is log-based, so power must be greater than zero. Entering zero or negative watts is physically meaningless.
Does it support dBW?
Not directly. Convert dBW to watts (P = 10^{dBW/10}) and then supply the watt value here.
What formula does the Power Converter use?
Linear units scale directly (1 kW = 1,000 W, 1 hp = 745.7 W). dBm references 1 mW so P(watts) = 10^{(dBm−30)/10}.
How do I use the Power Converter?
Enter the value and pick the unit (W, kW, MW, hp, or dBm). The calculator converts to watts internally and displays the rest, including dBm. Copy the format that matches your application.