Online Electronics Calculators & Conversion Tools

Glofell's Current Divider Calculator computes branch currents in parallel circuits using the current divider rule. Enter up to 10 resistor values for fast, reliable results.

Glofell's Length Conversion tool lets you convert between a wide range of length units—from millimeters to kilometers, inches to nautical miles. Choose the original unit, pick the target unit, and see the result instantly.

Easily convert decimal values into fractions or mixed numbers. For repeating decimals, simply enter the number of digits in the repeating sequence to get an accurate fractional result.

Use Glofell’s Battery Life Calculator to estimate device runtime from nominal battery capacity and the load’s average current draw. Capacity is commonly entered in amp-hours (Ah) or milliamp-hours (mAh), and may also be stated in watt-hours (Wh), making this a practical guide for power planning.

Analyze capacitor discharge through a fixed-value resistor. Enter the capacitance and the initial and final voltages to calculate the discharge time or required resistance, as well as the resistor’s initial power dissipation and the energy released as the capacitor falls to zero volts.

Use Glofell’s Capacitance Conversion tool to translate capacitor values between pF, nF, µF, and F. It makes component markings and equivalent values easy to compare.

Instantly convert energy values between British Thermal Units (BTU), joules, kilowatt-hours, therms, and both nutritional and thermochemical calories. Select a source unit, enter a value, and see the equivalent in your target unit.

Convert force values effortlessly between newtons, kilonewtons, pound-force, kilogram-force, and more. Pick a source unit, pick a target unit, enter a value, and get the result instantly.

Use Glofell's inductance conversion tool to switch between picohenries, nanohenries, microhenries, millihenries, and every other inductance unit in between. Enter a value once and instantly view its equivalent across the full scale.

Glofell's LED Series Resistor Calculator helps you find the current-limiting resistor needed to safely drive one or more LEDs. Enter the supply voltage, LED forward voltage, and operating current to get the recommended resistance and minimum power rating. For reliable operation and reduced heat, choose a resistor rated two to ten times above the calculated value.

Convert pressure readings across common measurement systems. Enter a value in any unit to display the corresponding values in every other supported unit.

Determine the R1 and R2 resistor values for a Pi attenuator. Design for the required signal reduction while maintaining the intended circuit impedance.

Find the correct R1 resistor value for a reflection attenuator with Glofell's online calculator, helping you achieve the desired attenuation and impedance match.

Calculate the R1 and R2 values required for a bridged-tee attenuator. Build a network that delivers accurate signal attenuation with proper impedance matching.

Glofell’s Tee Attenuator (T-pad) Calculator determines the R1 and R2 resistor values in ohms for a Tee attenuator. Enter the required attenuation in dB and the transmission line’s characteristic impedance to obtain resistor values that provide proper signal reduction and impedance matching.

Glofell’s Resistor Color Code Calculator decodes 4-band, 5-band, and 6-band resistors. Select each band to identify resistance, tolerance, and power rating for circuit work, repairs, or lab sorting.

Analyze a BJT cascode amplifier by calculating bias voltages, currents, gain, and frequency response. Enter the circuit parameters to assess and refine your amplifier design.

Calculate bias conditions, current levels, voltage gain, and frequency response for wide-band differential amplifiers. Use the results to evaluate performance and guide your design decisions.

Automatically calculate the operating conditions of a BJT used as a switch, including saturation behavior. This tool identifies the biasing values needed for reliable transistor performance and simplifies the design and analysis of transistor-based switching circuits.

Calculate capacitor energy and RC time constant with Glofell's online calculator. Enter voltage, capacitance, and optional resistance to see stored energy and charge/discharge behavior.

Convert wire sizes across AWG, metric area, circular mils, and more. Enter a known size or diameter to automatically see equivalent measurements.

Estimate key coil properties from wire diameter, winding count, and bobbin dimensions. Review coil geometry, wire length, resistance, and rated-current performance in one place.

Calculate the R1/R2 resistor ratio and key hysteresis-comparator parameters, including the reference voltage (VR), high threshold (VTH), and low threshold (VTL). Enter the positive and negative supply voltages with the threshold inputs to design and analyze a stable, noise-immune comparator circuit.

Develop flyback transformer parameters for switch-mode power supplies with this Flyback Switch Mode Regulator Calculator. It calculates key design values for flyback converter circuits, including transformer turns ratio, primary inductance, charge and discharge periods, and other critical parameters.

Analyze heat-sink performance in power-electronics applications, including LED heat sinks, flat-plate heat sinks, aluminum heat sinks, and other thermal solutions. Enter thermal resistance, power dissipation, and maximum ambient temperature to estimate component junction temperature and support reliable thermal design.

Design a switch-mode voltage regulator by calculating duty cycle, inductor value, current levels, and diode power loss. Use the results to optimize a DIY regulator circuit.

Analyze an inverting operational-amplifier circuit by entering the desired gain, output voltage (Vout), R1 resistance, and input voltages V1, V2, Vp, and Vn. The calculator automatically determines the required R2, R3, and R4 resistor values, helping you design and verify inverting op-amp configurations.

Calculate output voltage together with inverting and non-inverting gain for operational-amplifier circuits. Enter V1, V2, Vp, Vn, and resistor values R1 through R4 to obtain accurate results for circuit design, troubleshooting, and op-amp learning.

Glofell’s Ohm’s Law Calculator helps engineers and students quickly solve for voltage, current, resistance, and power. Provide any two known values to calculate the remaining parameters, making it a practical reference for circuit design, troubleshooting, and electronics learning.