Science
Ohm's Law Calculator
Enter any two of voltage, current, and resistance to solve the third and the power.
Resistor Color Code Calculator
Pick the band colors of a 4-band or 5-band resistor to read its resistance and tolerance.
Electrical Power Calculator
Compute electrical power from voltage and current, current and resistance, or voltage and resistance.
Capacitor Code Calculator
Convert a 3-digit capacitor code such as 104 into capacitance in pF, nF, and µF.
Voltage Divider Calculator
Enter input voltage and two resistors to find the divided output voltage.
LED Resistor Calculator
Find the series resistor for an LED from supply voltage, forward voltage, and current.
Wavelength & Frequency Converter
Convert between wavelength and frequency using the wave speed relation c = λf.
Frequency Converter
Convert a frequency between Hz, kHz, MHz, GHz and its period in seconds.
Density Calculator
Solve for density, mass, or volume using the density formula.
Force Calculator
Compute force, mass, or acceleration with Newton's second law F = m·a.
Kinetic Energy Calculator
Calculate the kinetic energy of a moving object from its mass and velocity.
Acceleration Calculator
Find acceleration from initial velocity, final velocity, and time.
Energy Converter
Convert energy between joules, calories, kilocalories, kWh, eV, and BTU.
Molar Mass Calculator
Calculate the molar mass of any chemical formula in grams per mole.
pH Calculator
Convert between hydrogen ion concentration, pH, and pOH.
Momentum Calculator
Compute linear momentum (p = m·v) or solve for mass or velocity given the other two values.
Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles, or temperature given the other three values.
Half-Life Calculator
Calculate remaining quantity, elapsed time, or half-life for radioactive decay problems.
Projectile Motion Calculator
Find time of flight, maximum height, and range from initial velocity and launch angle.
Torque Calculator
Compute torque (τ = F·r·sin θ) or solve for force, lever arm distance, or angle.