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    Voltage Divider Resistor Calculator | Calculate Voltage Ratios Easily

    Created by Md jony islam

    Voltage Divider Resistor to Resistor Calculated

    Calculate resistor values and voltage ratios for your circuits with our Voltage Divider Resistor Calculator. With a voltage divider calculator, you determine the out voltage based on resistor values.

    Resistor Voltage divider Calculator

    Voltage Divider Resistor Circuit

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    Voltage Divider Resistor to Resistor No load2 KΩR1Power Supply+-Vin© Online Works ToolsVoutR24 KΩ4 V12 VNo Load
    Fig-1: Voltage Divider Resistor to Resistor with No Load
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    • milliVolts (mV)
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    • millohms (mΩ)
    • ohms (Ω)
    • Kiloohms (KΩ)
    • Megaohms (MΩ)
    • Gigaohms (GΩ)
    Ω
    • millohms (mΩ)
    • ohms (Ω)
    • Kiloohms (KΩ)
    • Megaohms (MΩ)
    • Gigaohms (GΩ)
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    • nanovolts (nV)
    • microvolts (µV)
    • millivolts (mV)
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    • Kilovolts (KV)
    • megavolts (MV)

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    What is the Voltage Divider Resistance?

    The voltage divider calculator calculates the output voltage of the voltage divider network based on the value of the resistor, R1, resistor, R2, and the input voltage, Vin. This output voltage Vout, which is the voltage that is dropped across the resistor, R2, is calculated by the formula

    🙋 Try our Series Inductors Calculator . If you want to learn more about conversions using Electrponic Engineering Project Calculators.

    Voltage Divider Law (Resistive Circuit) - Voltage divider equations:

    For a circuit with two Resistor R1 and R2 in series connected to a voltage source Vin:

    Total Resistance (Rtotal):

    Rtotal = R1 + R2

    For Example, R1 = 2 kΩ, R2 = 3 kΩ, or Vin = 10V

    Rtotal = 2 kΩ + 3 kΩ = 5 kΩ

    Voltage Across R1 (V1):

    V1 = Vin ×R1R1 + R2

    For Example, R1 = 2 kΩ, R2 = 3 kΩ, or Vin = 10V

    V1 = 10 ×22 + 3 = 4V

    Voltage Across R2 (V2) NO Load:

    V2 = Vin ×R2R1 + R2

    For Example, R1 = 2 kΩ, R2 = 3 kΩ, or Vin = 10V

    V2 = 10 ×32 + 3 = 6V

    Voltage Across R2 (V2) With Load:

    V2 = Vin ×R2 || RLR1 + R2 || RL

    For Example, R1 = 2 kΩ, R2 = 3 kΩ, RL = 4 kΩ, or Vin = 10V

    V2 = 10 ×3 || 42 + 3 || 4 = 4V

    Suggested Reading

    Resistor Divider Resistor to Resistor

    Voltage dividers are very common and used very often in circuits. Many times in circuits, different levels of voltage must be allocated to different parts of a circuit. A voltage divider circuit, such as that shown above, can be used to do this. This can divide the input voltage that a circuit receives and allocate it accordingly and as needed to different parts of the circuit. For example, a circuit may receive 10V as input. However, one chip in the circuit may need 7 volts, while another chip in the circuit only needs 3 volts. We can allocate these voltages to the different chips by a voltage divider.

    Resistor Divider conversion application

    Frequently Asked Questions - Voltage Divider Resistor Calculate Conversion FAQs:

    How does the voltage divider calculator determine resistor values?

    The calculator executes computations through Vout = Vin × (R2/(R1 + R2)) but uses the voltage divider rule to find ideal resistor pairs. The input section requires users to enter their Vin and Vout specifications, followed by the automatic recommendation of standard-series practicable resistor values based on power specifications and current conditions.

    Can this calculator help with LED voltage dropping resistors?

    Special LED application capabilities exist within the calculator system. When you provide the LED forward voltage and desired current, the tool determines suitable dropping resistance values that both protect your LEDs and maintain safe dissipation power levels.

    How accurate are the calculated resistor values?

    The results show standard E12, E24, or E96 series values, although users can select 1% or 5% to 10% tolerance accuracy. The tool selects nearby matching resistor options before computing the genuine output voltage that these components will produce.

    Can I calculate power dissipation in my voltage divider circuit?

    The calculator measures power dissipation across each resistor through equations P = I²R as well as P = V²/R. The tool monitors electrical rating conditions by warning users with alerts and recommending matching wattage ratings appropriate for each resistor selection based on circuit specifications.

    Does the calculator account for load resistance in voltage divider calculations?

    The calculator contains built-in functionality for calculating load resistance effects during its computations. The calculator permits inputting your target load resistance to modify the resistor values in the voltage divider section in order to maintain your specified output voltage under load conditions, alongside minimizing power usage.

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    About the Author

    Md Jony Islam

    Md Jony Islam: Multidisciplinary Engineer & Financial Expert:

    Md. Jony Islam is a highly skilled professional with expertise in electronics, electrical, mechanical, and civil engineering, as well as finance. Specializing in transformer service and maintenance for 33/11kV substations, he ensures reliable and efficient electrical systems. His mechanical engineering skills drive innovative designs, while his financial acumen supports effective project budgeting. With a strong foundation in civil engineering, he contributes to robust infrastructure development. Md. Jony Islam's multidisciplinary approach ensures efficiency, quality, and reliability across all projects.