Science calculators
Physics, chemistry, electrical and weather. 25 in this section.
- Ohm's Law CalculatorEnter any two of voltage, current, resistance and power to solve for the other two.
- Watts, Amps and Volts CalculatorConvert between watts, amps and volts for DC, single-phase and three-phase AC with power factor.
- Voltage Drop CalculatorVoltage drop and percent drop for copper or aluminum wire by AWG size, length and load current.
- Resistor Color Code CalculatorRead the value and tolerance of a 4-band or 5-band resistor from its color bands.
- Series and Parallel Resistor CalculatorTotal resistance of any number of resistors wired in series or in parallel.
- Speed, Distance and Time CalculatorSolve for speed, distance or travel time from the other two, in miles or kilometers.
- Acceleration CalculatorAverage acceleration from starting speed, final speed and time, in m/s², ft/s² and g.
- Force Calculator (F = ma)Solve Newton's second law for force, mass or acceleration, with results in newtons and pounds-force.
- Kinetic Energy CalculatorKinetic energy from mass and speed, in joules or bullet muzzle energy in foot-pounds.
- Potential Energy CalculatorGravitational potential energy from mass, height and gravity on Earth, the Moon or other planets.
- Density CalculatorSolve for density, mass or volume and compare the result with water.
- Half-Life CalculatorAmount remaining after radioactive decay from the half-life and elapsed time, with a decay table.
- Molarity CalculatorMolar concentration from mass, molar mass and volume, or the mass needed to make a solution.
- Dilution Calculator (C1V1 = C2V2)Solve C1V1 = C2V2 for any one value to dilute a stock solution to the concentration you need.
- Ideal Gas Law CalculatorSolve PV = nRT for pressure, volume, moles or temperature using the CODATA gas constant.
- Projectile Motion CalculatorRange, maximum height and time of flight from launch speed, angle and launch height (no air drag).
- Gravitational Force CalculatorNewton's law of universal gravitation: the attraction between two masses at a given distance.
- pH CalculatorConvert between pH, pOH, hydrogen ion and hydroxide ion concentration at 25 °C.
- Wavelength, Frequency and Photon Energy CalculatorConvert between wavelength, frequency and photon energy of light and other electromagnetic waves.
- Wind Chill CalculatorWind chill temperature using the National Weather Service formula, with frostbite risk.
- Heat Index CalculatorHeat index (apparent temperature) from temperature and humidity using the NWS Rothfusz equation.
- Dew Point CalculatorDew point from air temperature and relative humidity using the Magnus formula.
- Relative Humidity CalculatorRelative humidity from air temperature and dew point using the Magnus formula.
- Decibel CalculatorAdd sound levels in dB, convert power or amplitude ratios to decibels, or decibels back to ratios.
- Ballistics Calculator (Bullet Drop)Approximate bullet drop and MOA correction to 600 yards from muzzle velocity, G1 BC, sight height and zero.