Physics, chemistry and electronics formulas.
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 below are free, run entirely in your browser, and need no sign-up.
Free Ohm's law calculator. Enter any two of voltage, current, resistance or power and instantly solve for the other two using V=IR and P=VI.
Free resistor color code calculator. Pick the bands on a 4, 5 or 6 band resistor and read the resistance value, tolerance and temperature coefficient.
Free scientific notation converter. Convert any decimal number to scientific and E notation, or expand scientific notation back to a plain decimal.
Free significant figures counter and rounder. Count the sig figs in any number and round it to a chosen number of significant figures instantly.
Free pH calculator. Convert between hydrogen ion concentration and pH, find pOH and hydroxide concentration, and classify a solution as acid or base.
Free molarity calculator. Solve for molar concentration, moles of solute, or solution volume using M equals moles divided by liters. Enter any two.
Free molar mass calculator. Type a chemical formula like H2O or Ca(OH)2 and get its molar mass in grams per mole with a per element breakdown.
Free density calculator. Solve for density, mass, or volume using density equals mass over volume. Enter any two values and get the third instantly.
Free force calculator using Newton's second law. Solve for force, mass, or acceleration with F equals m times a. Enter any two and get the third.
Free kinetic energy calculator. Compute kinetic energy from mass and velocity, or solve for mass or speed, using KE equals one half m v squared.
Free gravitational potential energy calculator. Compute PE from mass, gravity and height using PE equals m g h, or solve for any missing value.
Free wavelength to frequency converter. Convert between wavelength and frequency for light or any wave using c equals lambda times f. Set the wave speed.
Free voltage divider calculator. Enter the input voltage and two resistor values to find the output voltage using Vout equals Vin times R2 over R1 plus R2.
Free capacitor code calculator. Enter a 3 digit ceramic capacitor code like 104 and get the capacitance in picofarads, nanofarads and microfarads.
Free weight on planets calculator. Enter your weight on Earth to see what you would weigh on the Moon, Mars, Jupiter and every planet in the solar system.
Free ideal gas law calculator. Solve PV equals nRT for pressure, volume, moles or temperature. Enter any three values using SI units and get the fourth.
Free torque calculator. Compute torque from force, lever arm length and angle using tau equals force times radius times the sine of the angle.
Free percent error calculator. Compare a measured value against the true value and get the absolute error and percent error for lab reports instantly.
Free decibel calculator. Convert a power or amplitude ratio to decibels and back, using 10 log for power and 20 log for voltage or amplitude ratios.
Free speed distance time calculator. Solve for speed, distance or time using speed equals distance over time. Enter any two values and get the third.
Free acceleration calculator. Find acceleration from the change in velocity over time using a equals delta v over t, or solve for velocity or time.
Free projectile motion calculator. Enter launch speed and angle to find range, maximum height and flight time for a projectile on level ground.
Free half-life calculator. Find the remaining amount of a decaying substance after a given time, or work out its half-life from an amount and elapsed time.
Free specific heat calculator. Solve the heat equation Q equals m c delta T for heat energy, mass, specific heat or temperature change. Enter any three.
Yes. Every science tool on yourhack.ai is completely free, with no sign-up and no usage limits.
Yes. They run in any modern web browser on phone, tablet or desktop. There is nothing to install.
Yes. These tools run entirely in your browser, so nothing you enter is uploaded to a server.
There are currently 24 free science tools here, and we add more regularly.