Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Electronics & Hardware Engineering
dB to Watt Calculator — Power & Voltage Ratio Conversion
Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.
Convert dB to power and voltage ratios relative to a reference. Planning estimates only — verify with production tools and vendor pricing where applicable.
Inputs
-6060
0.0011000
01
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: Power ratio = 10.00×. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
Scenario studio
Compare A vs B
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Scenario A
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Scenario B
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Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
dB value
The “dB value” value used in this tool’s formula. Adjust it to see results update live.
Reference power (mW)
The “Reference power (mW)” value used in this tool’s formula. Adjust it to see results update live.
Type (0=power dB, 1=voltage dB)
The “Type (0=power dB, 1=voltage dB)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Convert dB to power and voltage ratios relative to a reference. Planning estimates only — verify with production tools and vendor pricing where applicable. Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio. Example: +10 dB → 10× power; +3 dB → ~2× power.
Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.
Example: +10 dB → 10× power; +3 dB → ~2× power.
When to use this Decibel (dB) to Watt/Volt
Common use cases
- Convert dB to power and voltage ratios relative to a reference.
- Sanity-check with this case: +10 dB → 10× power; +3 dB → ~2× power.
- The relationship is: Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.
Localized examples
- Electronics & Hardware Engineering: the example on this page uses the same formula as the widget.
What you get
- Fields: dB value, Reference power (mW), Type (0=power dB, 1=voltage dB)
- Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.
- Example on the page: +10 dB → 10× power; +3 dB → ~2× power.
How to Calculate Decibel (dB) to Watt/Volt Step-by-Step
- 1Enter dB value, Reference power (mW), Type (0=power dB, 1=voltage dB). Use the values you have, not a catalog average, unless that is all you know.
- 2Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.
- 3Worked case: +10 dB → 10× power; +3 dB → ~2× power.
- 4Compare the result to last month’s invoice or a vendor calculator before you commit capacity.
Governing formula
Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.
+10 dB → 10× power; +3 dB → ~2× power.
Example: set dB value = 10, Reference power (mW) = 1, Type (0=power dB, 1=voltage dB) = 0, then read the result.
Variable definitions
- dbValue
dB value
The “dB value” field. Default 10; typical range -60–60.
- refPowerMw
Reference power (mW)
The “Reference power (mW)” field. Default 1; typical range 0.001–1000.
- convertType
Type (0=power dB, 1=voltage dB)
The “Type (0=power dB, 1=voltage dB)” field. Default 0; typical range 0–1.
- Closed-form math (Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.) misses idle time, egress, packet loss, and reserved capacity on the real bill.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Power ratio = 10^(dB/10); voltage ratio = 10^(dB/20); watts = ref × ratio.
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Community
Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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