Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Electronics & Hardware Engineering
Voltage Divider Calculator — Output Voltage from Two Resistors
Vout = Vin × R2 ÷ (R1 + R2).
Compute output voltage in a resistive voltage divider circuit. Planning estimates only — verify with production tools and vendor pricing where applicable.
Inputs
0.11000
110000000
110000000
Smart analysis
Recommendations
Tailored to your live inputs and result—guidance only, not professional advice.
- Interpret
Treat this as a planning estimate
Primary result: Output voltage = 2.50 V. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.
Scenario studio
Compare A vs B
Capture two sets of inputs on this device, then see which outcome wins. Share either scenario with a link.
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.
Input voltage (V)
The “Input voltage (V)” value used in this tool’s formula. Adjust it to see results update live.
R1 (Ω)
The “R1 (Ω)” value used in this tool’s formula. Adjust it to see results update live.
R2 (Ω)
The “R2 (Ω)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Compute output voltage in a resistive voltage divider circuit. Planning estimates only — verify with production tools and vendor pricing where applicable. Vout = Vin × R2 ÷ (R1 + R2). Example: 5 V in, R1=10 kΩ, R2=10 kΩ → 2.5 V out.
Vout = Vin × R2 ÷ (R1 + R2).
Example: 5 V in, R1=10 kΩ, R2=10 kΩ → 2.5 V out.
When to use this Voltage Divider
Common use cases
- Compute output voltage in a resistive voltage divider circuit.
- Sanity-check with this case: 5 V in, R1=10 kΩ, R2=10 kΩ → 2.5 V out.
- The relationship is: Vout = Vin × R2 ÷ (R1 + R2).
Localized examples
- Electronics & Hardware Engineering: the example on this page uses the same formula as the widget.
What you get
- Fields: Input voltage (V), R1 (Ω), R2 (Ω)
- Vout = Vin × R2 ÷ (R1 + R2).
- Example on the page: 5 V in, R1=10 kΩ, R2=10 kΩ → 2.5 V out.
How to Calculate Voltage Divider Step-by-Step
- 1Enter Input voltage (V), R1 (Ω), R2 (Ω). Use the values you have, not a catalog average, unless that is all you know.
- 2Vout = Vin × R2 ÷ (R1 + R2).
- 3Worked case: 5 V in, R1=10 kΩ, R2=10 kΩ → 2.5 V out.
- 4Compare the result to last month’s invoice or a vendor calculator before you commit capacity.
Governing formula
Vout = Vin × R2 ÷ (R1 + R2).
5 V in, R1=10 kΩ, R2=10 kΩ → 2.5 V out.
Example: set Input voltage (V) = 5, R1 (Ω) = 10,000, R2 (Ω) = 10,000, then read the result.
Variable definitions
- vin
Input voltage (V)
The “Input voltage (V)” field. Default 5; typical range 0.1–1000.
- r1
R1 (Ω)
The “R1 (Ω)” field. Default 10000; typical range 1–10000000.
- r2
R2 (Ω)
The “R2 (Ω)” field. Default 10000; typical range 1–10000000.
- Closed-form math (Vout = Vin × R2 ÷ (R1 + R2).) misses idle time, egress, packet loss, and reserved capacity on the real bill.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Vout = Vin × R2 ÷ (R1 + R2).
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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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