Engineering Tools & Online Calculators
A structured library of practical calculators for analog design, RF engineering, power management, PCB and passive components, unit conversion and mathematics.
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A structured library of practical calculators for analog design, RF engineering, power management, PCB and passive components, unit conversion and mathematics.
Topology calculations, amplifier design, biasing and parameter verification for fundamental electronic circuits.
This BJT Cascode Amplifier Calculator computes bias voltages and currents, voltage gain, and frequency response for a Cascode amplifier. Simply enter the amplifier parameters and click “Compute” to instantly calculate bias levels, gain, and frequency characteristics, helping you analyze and design Cascode amplifier circuits efficiently.
The BJT Transistor as a Switch (Saturation) Calculator is an online tool used to automatically calculate the operating conditions of a BJT used as a switch, including saturation behavior. It helps determine the required biasing values to ensure reliable switching performance in transistor-based circuits.
This Online Hysteresis Comparator Calculator computes the resistor ratio (R1/R2) and determines key comparator parameters, including the reference voltage (VR) and the hysteresis threshold levels. By entering the positive and negative supply voltages, the calculator instantly provides the High Threshold Voltage (VTH), Low Threshold Voltage (VTL), R1/R2 resistor ratio, and reference voltage, helping you accurately design and analyze hysteresis comparator circuits.
Calculate branch currents in parallel circuits using the current divider rule. Supports up to 10 resistors with instant, accurate results.
The Inverting Op Amp Resistor Calculator is a practical tool for analyzing operational amplifier inverting circuits. By entering parameters such as the desired gain, output voltage (Vout), R1 resistance, and the input voltages V1, V2, Vp, and Vn, the calculator automatically determines the required resistor values (R2, R3, and R4). Simply input the values and click “Calculate” to quickly design and verify inverting op amp configurations.
YUGUANG’s Ohm’s Law Calculator helps engineers and students quickly calculate resistance, current, voltage, and power in an electrical circuit. Simply enter any two known values, and the calculator will instantly compute the remaining parameters. This fast and easy-to-use online tool illustrates the fundamental relationship between voltage, current, and resistance, making it essential for circuit design, troubleshooting, and electronics learning.
The Op Amp Voltage and Gain Calculator is an easy-to-use tool for analyzing operational amplifier circuits. It calculates the output voltage, inverting gain, and non-inverting gain based on the input parameters. Simply enter the values of V1, V2, Vp, Vn, and the resistor values R1, R2, R3, and R4, and the calculator will instantly provide accurate results. This tool is suitable for both professional engineers and beginners learning op amp circuit design.
The Wideband Differential Amplifier Calculator computes bias voltages, current levels, voltage gain, and frequency response for wideband differential amplifier circuits. Enter the amplifier parameters to quickly analyze and design differential amplifiers with accurate performance predictions.
High-frequency communication, impedance matching and signal-level control calculators.
This Bridged-Tee Attenuator Calculator helps you determine the resistor values (R1 and R2) needed for a bridged-tee attenuator, enabling accurate signal attenuation and proper impedance matching in your circuit.
This calculator helps you determine the resistor values (R1 and R2) required to design a Pi Attenuator, ensuring accurate signal attenuation and proper impedance matching in your circuit.
This Reflection Attenuator Calculator helps you determine the correct R1 resistor value for designing a reflection attenuator, ensuring proper signal attenuation and impedance matching in your circuit.
YUGUANG's Tee Attenuator (T-pad) Calculator helps you determine the resistor values (R1 and R2 in ohms) for designing a Tee attenuator. Simply enter the desired attenuation (dB) and the characteristic impedance of the transmission lines, and the calculator will provide the required resistor values for proper signal attenuation and impedance matching.
Design support for switching supplies, transformers, capacitor discharge and thermal management.
Use YUGUANG’s Battery Life Calculator to estimate how long your device can operate based on battery capacity and average current consumption. By entering the nominal battery capacity and the load’s average current draw, the calculator predicts the expected battery runtime. Battery capacity is typically measured in amp-hours (Ah) or milliamp-hours (mAh), while watt-hours (Wh) may also be used in some applications. This tool provides a quick and practical way to evaluate battery performance for electronic devices and power-consumption planning.
This calculator analyzes the discharge of a capacitor through a fixed-value resistor. By entering the capacitance and the initial and final voltages, it can calculate the discharge time or required resistance, as well as the initial power dissipation in the resistor and the total energy released as the capacitor discharges to zero volts.
The Flyback Transformer Design and Calculator, also known as the Flyback Switch Mode Regulator Calculator, is an online tool for electrical and power electronics designers. It enables the calculation of key design parameters for flyback converter circuits, including the transformer turns ratio, primary inductance, and charge/discharge periods. This calculator helps streamline the design and optimization of flyback transformers used in switch-mode power supplies.
The Heat Sink Temperature Calculator is an online tool designed for analyzing heat sink performance in power electronics. It can be used to evaluate LED heat sinks, flat plate heat sinks, aluminum heat sinks, and other thermal solutions. By entering parameters such as heat sink thermal resistance, power dissipation, and maximum ambient temperature, the calculator determines the junction temperature of power components. This tool helps engineers ensure proper thermal management and reliable operation of electronic devices.
The Switching Regulator Design Calculator is an online tool for designing switch-mode voltage regulators. It allows you to calculate key parameters such as duty cycle, inductor value, current levels, and diode power dissipation. With these calculated results, you can efficiently design and optimize your own DIY switching regulator circuits.
PCB design parameters and physical calculations for resistors, capacitors, inductors, wires and coils.
Use this Capacitor Energy (E) and RC Time Constant Calculator to compute the energy stored in a capacitor and its RC time constant. Calculate the time constant (T) using the capacitance (C) and load resistance (R). Calculate the energy (E) stored in the capacitor using voltage (V), capacitance (C), and load resistance (R). Simply enter the known values, and the calculator instantly provides the resulting energy and time constant, making it easy to analyze capacitor behavior in your circuits.
The Flyback Transformer Design and Calculator, also known as the Flyback Switch Mode Regulator Calculator, is an online tool for electrical and power electronics designers. It allows you to calculate key parameters required for flyback converter design, including transformer turns ratio, primary inductance, charge and discharge periods, and other critical values. This calculator helps streamline the design and analysis of flyback transformer circuits for switch-mode power supplies.
This tool calculates the current-limiting resistor value required to safely drive single or multiple LEDs. By entering the supply voltage, LED forward voltage, and operating current, the LED Series Resistor Calculator determines both the recommended resistor value and the required power rating. To ensure reliable operation and prevent excessive heat, it is recommended to select a resistor with a power rating 2 to 10 times higher than the calculated value. This tool is ideal for designing LED circuits with proper current control and thermal safety.
YUGUANG’s Resistor Color Code Calculator is an interactive tool for identifying resistor values based on 4-band, 5-band, and 6-band color codes. Simply select the colors, and the calculator will display the resistance in Ohms (Ω), tolerance, and power rating. Whether you are building a circuit, repairing electronics, or sorting resistors in your lab, this calculator provides an accurate and efficient way to decode resistor values.
This tool calculates nominal equivalent wire size values across multiple standards, including American Wire Gauge (AWG), square millimeter area (mm²), circular mil area (CMA), and more. Simply enter a known wire size or value, and all corresponding equivalent measurements will be calculated and displayed automatically.
Quick conversion of common physical quantities for consistent engineering calculations.
Use YUGUANG’s Capacitance Conversion Chart and Calculator to easily convert capacitor codes to actual capacitance values and perform unit conversions between picofarads (pF), nanofarads (nF), microfarads (µF), and farads (F). This tool helps engineers and hobbyists quickly interpret capacitor markings and compare capacitance values across different unit systems.
This tool calculates equivalent energy values across multiple units, including British Thermal Units (BTU), Joules (J), kilowatt-hours (kWh), therms (THM), and calories (both nutritional and thermochemical). Simply select the target unit, enter the value to convert from, and the converted result will appear instantly.
The Force Conversion Tool lets you convert force values between commonly used mechanical units, including Newtons (N), kilonewtons (kN), kilogram-force (kgf), and more. Simply choose the target unit, enter the value to convert from, and the equivalent force value will be displayed instantly.
The Inductance Conversion Tool converts inductance values across different unit scales, from picohenries (pH) to kilohenries (kH) and all units in between. Simply enter a value into any unit field, and the equivalent inductance values will be displayed instantly in all other units.
Use this Length Conversion Tool to quickly convert between commonly used length units. Select the original unit in the upper field, choose the target unit in the lower field, and enter a value to instantly generate accurate conversion results. Supported units include kilometers (km), miles (mi), nautical miles (nmi), meters (m), yards (yd), feet (ft), inches (in), centimeters (cm), and nanometers (nm), covering both everyday and scientific measurement needs.
Use this Pressure Conversion Tool to calculate equivalent pressure values across multiple measurement units. Simply enter a value into any input field, and the corresponding pressure values in all other units will be calculated instantly.
Fast conversion between common numerical formats for engineering work.
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