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RK
Rojony Khatun
Last updated: Jun 3, 2026

Thermal Voltage Calculator

Calculate thermal voltage (Vt) for semiconductors at any temperature. Uses Vt = Kt/q to find voltage in volts or millivolts.

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Thermal Voltage Calculator

Calculate thermal voltage (Vt) for semiconductors at any temperature. Uses Vt = Kt/q to find voltage in volts or millivolts.

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semiconductor voltage calc

Thermal voltage [V T ] can be calculated as V T = kT / q . Thermal voltage at 300K is nearly 25.85 mV.

Formula & Table Summary:

  • V_H = (B × I) / (n × q × t)
  • B in tesla (T)
  • I in amperes (A)
  • n in carriers per cubic meter (m⁻³)
  • t in meters (m)
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thermal voltage tool

A Thermal Voltage Calculator calculates the thermal energy variable into a voltage depending on any temperature. Equation: V T = kT/ q. V T is approximated to 25.85 mV at 300K. The thermal voltage is approx. 25.85 mV at room temperature (300 K). The value varies linearly with temperature and is vital to calculations in diode equations, transistors analysis (BJT), and physics of semiconductors. The calculator can be used by engineers and students to swiftly find Vt at any temperature of operation, taking into account that correct modelling of the current-voltage characteristics of devices should be built on Vt measurements.

silicon thermal voltage

B (T) I (A) n (m⁻³) t (m) V_H (µV)
0.5 0.01 8.5×10²⁸ 0.001 36.76
1.0 0.02 8.5×10²⁸ 0.002 73.53
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Frequently Asked Questions - Thermal Voltage Calculator:

Hall voltage is the voltage generated across a conductor in a magnetic field due to the Hall effect.
Use V_H = (B × I) / (n × q × t).
B in tesla, I in amperes, n in m⁻³, q in coulombs, t in meters, V_H in volts.
It’s used in magnetic field measurement, current sensing, and position detection.
Yes, via charge carrier density (n) and type of carriers.
Often in microvolts for metals, higher for semiconductors.
Yes, depending on the type of charge carriers (electrons or holes).
Yes, in wheel speed sensors, throttle position sensors, and current sensors.
Yes, by changing carrier density and mobility.
q is the elementary charge, about 1.602×10⁻¹⁹ coulombs.
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