Skip to content
OneKitly
Sign up · Sign in

LC resonant frequency calculator

Compute the resonant frequency of an LC circuit from inductance and capacitance.

Related tools

All Physics tools →
Frequency & period calculatorConvert a frequency into its period (T = 1 / f) in seconds and milliseconds.Musical note frequency calculatorCompute a note's frequency a number of semitones from a reference pitch (A4).Wave speed calculatorCompute wave speed from frequency and wavelength (v = fλ).Acceleration calculatorCompute acceleration from the change in velocity over time.Angular Velocity CalculatorConvert RPM, rad/s, Hz and period, or derive ω from a linear speed and radius — with tangential speed and centripetal acceleration.Banana radiation (equivalent dose) calculatorPut any radiation dose in perspective with the Banana Equivalent Dose — the tiny ~0.1 µSv you get from the potassium-40 in one banana. Enter a dose in µSv, mSv, Sv, mrem or rem and it converts to bananas, standard units and a plain-language risk band.Bernoulli equation calculatorBernoulli's principle for an ideal fluid: pressure + kinetic + potential head stays constant along a streamline, P + ½ρv² + ρgh = constant. Give the conditions at two points and leave one unknown — pressure, velocity or elevation — and it solves for it, revealing how a pipe that narrows speeds the flow and drops the pressure.BPM delay time calculatorTurn a track's tempo into delay and reverb times in milliseconds.

Need Resonant frequency (Hz)? The LC resonant frequency calculator derives it from Inductance (mH), Capacitance (µF) in one step. For instance, with Inductance (mH) = 10 and Capacitance (µF) = 100 it returns Resonant frequency (Hz) = 159.155.

How to use it

  1. Enter your values: Inductance (mH), Capacitance (µF).
  2. Read the result instantly: Resonant frequency (Hz).

Frequently asked questions

How does the LC resonant frequency calculator work?

It takes Inductance (mH) and Capacitance (µF) and derives Resonant frequency (Hz) from them. The calculation is live as you type, so the result updates on every change.

Which values does the calculator ask for?

2 values: Inductance (mH) and Capacitance (µF). Nothing else is required — no account, no file upload.

What does a typical calculation look like?

With Inductance (mH) = 10 and Capacitance (µF) = 100, the calculator returns Resonant frequency (Hz) = 159.155. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

How much does the result change with different inputs?

It moves a lot. Using Inductance (mH) = 20 and Capacitance (µF) = 200 instead, Resonant frequency (Hz) goes from 159.155 to 79.578 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Inductance (mH) = 5 and Capacitance (µF) = 50, Resonant frequency (Hz) comes out at 318.31. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Checking a homework answer, sizing something before building it, and getting an order of magnitude before committing to a design — a torque on a bolt, the force a spring returns, the frequency a circuit resonates at, how long light takes to arrive.

What is the most common mistake?

Feeding in a value in the wrong unit. Physics formulas assume SI throughout, so grams instead of kilograms or centimetres instead of metres shifts the answer by powers of ten without any warning.

What is the difference between the LC resonant frequency calculator and the Frequency & period calculator?

This one returns Resonant frequency (Hz); the Frequency & period calculator returns Period (s) and Period (ms). That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Musical note frequency calculator is the closest one after this: Compute a note's frequency a number of semitones from a reference pitch (A4).

Where do the figures come from, and how current are they?

Constants are the CODATA values and the formulas are the textbook ones. Most assume an idealised case — no air resistance, no friction, a point mass — and the tool says so where the simplification matters.

Further reading

All guides →
ExplainerHow the Doppler Effect Works: The Formula, the Sign Convention, and Why Moving the Source Is Not the Same as Moving the ListenerFor sound, f' = f(v + v_o)/(v − v_s) — and getting the signs backwards is the classic error. Here is the convention spelled out, a 440 Hz source computed at four speeds, and why light needs a different equation entirely.ExplainerWhat Is the Reynolds Number? The Formula, the Units That Cancel, and Why 2 300 Is Only for PipesRe = ρvL/μ compares inertia with viscosity, and the units really do cancel. See the number worked out for honey, a household pipe, an artery, a swimmer and a wing — and why the 2 300 threshold belongs to pipe flow alone.GuideThe Four Kinematics Equations: Which One to Use, and What Each One Leaves OutFive variables, four equations, and each equation is missing exactly one of them. Choose by looking at the variable the question never mentions.ExplainerHooke's Law Explained: F = kx, Real Spring Constants, and Where It Stops HoldingHooke's law says force is proportional to stretch — but only below the elastic limit. Here is F = kx with worked numbers, what a 200 N/m spring actually feels like, and how springs combine.ExplainerHow Buoyancy Works: Archimedes' Principle, and Why Ice Floats With 10.5 % Above WaterThe upward force equals the weight of the fluid pushed aside. That one sentence decides whether something floats, and if it floats, exactly how much of it stays under.ExplainerProjectile Motion Explained: Range, Height, Flight Time — and Why 45° Is Not Always BestThree formulas cover the whole of projectile motion on level ground. The catch is level ground: the moment launch and landing heights differ, the 45° result stops being true.
LC resonant frequency calculator — OneKitly