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Drift Velocity Calculator
Electron drift velocity in a wire from current, wire size and carrier density.
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Drift velocity
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Electron drift velocity in a wire from current, wire size and carrier density.
Drift Velocity Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: vd = I / (n q A).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Drift Quick Guide
Typical values for reference.
| Current A | Diameter mm | Drift | Drift |
|---|---|---|---|
| 10 | 2 | 2.337e-1 mm/s | 8.501e+28 mm/s |
| 1 | 1 | 9.349e-2 mm/s | 8.500e+28 mm/s |
| 20 | 3 | 2.078e-1 mm/s | 8.498e+28 mm/s |
| 5 | 2 | 1.656e-1 mm/s | 5.999e+28 mm/s |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Drift Velocity Calculator FAQ
Answers to common questions about this calculator.
The average speed of charge carriers in a conductor.
Huge numbers of carriers share the current.
No, the field propagates near light speed.
I = n A v q.