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Physics, chemistry and electronics formulas. 24 free tools, no sign-up.

Ohm's Law CalculatorEnter any two of voltage, current, resistance or power and instantly solve for the other two using V=IR and P=VI.Resistor Color Code CalculatorPick the bands on a 4, 5 or 6 band resistor and read the resistance value, tolerance and temperature coefficient.Scientific Notation ConverterConvert any decimal number to scientific and E notation, or expand scientific notation back to a plain decimal.Significant Figures CounterCount the sig figs in any number and round it to a chosen number of significant figures instantly.pH CalculatorConvert between hydrogen ion concentration and pH, find pOH and hydroxide concentration, and classify a solution as acid or base.Molarity CalculatorSolve for molar concentration, moles of solute, or solution volume using M equals moles divided by liters. Enter any two.Molar Mass CalculatorType a chemical formula like H2O or Ca(OH)2 and get its molar mass in grams per mole with a per element breakdown.Density CalculatorSolve for density, mass, or volume using density equals mass over volume. Enter any two values and get the third instantly.Force Calculator (F = ma)Solve for force, mass, or acceleration with F equals m times a. Enter any two and get the third.Kinetic Energy CalculatorCompute kinetic energy from mass and velocity, or solve for mass or speed, using KE equals one half m v squared.Gravitational Potential Energy CalculatorCompute PE from mass, gravity and height using PE equals m g h, or solve for any missing value.Wavelength Frequency ConverterConvert between wavelength and frequency for light or any wave using c equals lambda times f. Set the wave speed.Voltage Divider CalculatorEnter the input voltage and two resistor values to find the output voltage using Vout equals Vin times R2 over R1 plus R2.Capacitor Code CalculatorEnter a 3 digit ceramic capacitor code like 104 and get the capacitance in picofarads, nanofarads and microfarads.Weight on Other Planets CalculatorEnter your weight on Earth to see what you would weigh on the Moon, Mars, Jupiter and every planet in the solar system.Ideal Gas Law CalculatorSolve PV equals nRT for pressure, volume, moles or temperature. Enter any three values using SI units and get the fourth.Torque CalculatorCompute torque from force, lever arm length and angle using tau equals force times radius times the sine of the angle.Percent Error CalculatorCompare a measured value against the true value and get the absolute error and percent error for lab reports instantly.Decibel (dB) CalculatorConvert a power or amplitude ratio to decibels and back, using 10 log for power and 20 log for voltage or amplitude ratios.Speed Distance Time CalculatorSolve for speed, distance or time using speed equals distance over time. Enter any two values and get the third.Acceleration CalculatorFind acceleration from the change in velocity over time using a equals delta v over t, or solve for velocity or time.Projectile Range CalculatorEnter launch speed and angle to find range, maximum height and flight time for a projectile on level ground.Half-Life CalculatorFind the remaining amount of a decaying substance after a given time, or work out its half-life from an amount and elapsed time.Specific Heat CalculatorSolve the heat equation Q equals m c delta T for heat energy, mass, specific heat or temperature change. Enter any three.

Free science tools: Ohm law, resistor color code, molar mass, molarity, ideal gas law, density, energy and wavelength calculators. Instant, accurate, right in your browser. All 24 tools are free, run entirely in your browser, and need no sign-up.

Frequently asked questions

Are these science tools free?

Yes. Every science tool on yourhack.ai is completely free, with no sign-up and no usage limits.

Do these science tools work on mobile?

Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.

Is my data private?

Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.

How many science tools are there?

There are currently 24 free science tools here, and we add more regularly.

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