FormulaCalculators.com - Online Calculators for Formulas and Equations

Formula Calculators provides free online calculators for engineers, students, and hobbyists. These calculators solve problems from a variety of areas, such as electrical and control theory. I created these free online calculators because they are useful to me in my work, and I wanted to make them available to everyone else. Each calculator page includes the formulas used and example problem walkthroughs. I hope that using these calculators saves you time, and the included educational materials help so that you don’t have to trust an online calculator blindly.

I put a lot of effort into making these calculators accurate, intuitive, and easy to use. All of them should just let you start entering what you have and automatically fill in the rest. Please let me know if you find any mistakes, if there are any suggested improvements, or if you would like to request a new calculator. If you find these calculators useful, consider buying me a coffee!

Compensator Vref Voltage Setpoint Resistor Calculator

February 16, 2021 Jeremy Edmonds Control Theory, Electrical

This voltage setpoint calculator is part of a series of design calculators for switching DC power supply feedback compensators. It allows you to input the desired setpoint voltage and the Vref voltage, which is typically determined by a Zener diode. In practical applications, the resistors used in the voltage setpoint[…]

How to Solve dBm Watts Power Formula Calculator

February 15, 2021 Jeremy Edmonds Electrical

This dBm Watts Power formula calculator can calculate dBm (decibel-milliwatts) from watts power and can calculate the watts power from dBm.

How to Solve Decibel dB Watts Power Formula Calculator

February 15, 2021 Jeremy Edmonds Electrical

This dB Watts formula calculator can calculate dB (decibels) from input and output power and can calculate the wattage power from dB.

How to Solve Decibel dB Volts Formula Calculator

February 15, 2021 Jeremy Edmonds Control Theory, Electrical

This dB Volts formula calculator can calculate dB (decibels) from input and output voltage and can calculate the voltage from dB.

How to Convert PID Values to Pole Zero Gain Calculator

January 23, 2021 Jeremy Edmonds Control Theory

This calculator converts PID parameters into Pole, Zeros, and Gain. You can use this calculator to bridge the gap between PID and s-domain.

How to Solve Capacitive Reactance Formula Calculator

January 12, 2021 Jeremy Edmonds Electrical

This capacitive reactance formula calculator can calculate capacitance from reactance and can calculate the capacitive reactance. Capacitors have an effective resistance known as reactance that varies with frequency. When a direct current (DC) is applied to a capacitor, it acts as an open circuit. But as you apply higher frequencies[…]

How to Solve Inductive Reactance Formula Calculator

January 12, 2021 Jeremy Edmonds Electrical

This inductive reactance formula calculator can calculate inductance from reactance and can calculate the inductive reactance. Inductors have an effective resistance known as reactance that varies with frequency. When a direct current (DC) is applied to a capacitor, it acts as a short circuit. But as you apply higher frequencies[…]

How to Solve Ohms Law With Formula Calculator

January 11, 2021 Jeremy Edmonds Electrical

This ohms law calculator can solve for volts, amps, ohms, and watts. Just enter any two values you have, and it automatically solves the other two using ohms law formulas. The most fundamental set of electrical formulas is known as Ohm’s Law. They describe the relationship between Ohms, Volts, Amps,[…]