Calcolatrici di scienze e ingegneria
Calcolatrici per fisica, chimica e lavori elettrici. Applichi la legge di Ohm, legga il codice colori dei resistori, calcoli potenza, energia e forza, la massa molare di un composto o la diluizione di una soluzione e risolva domande su velocità, distanza e tempo.
Ogni calcolatrice mostra la formula e le costanti usate, con le unità su ogni campo.
Electrical Vedi tutti
Ohm's Law CalculatorEnter any two of voltage, current, resistance and power and get the other two.Voltage Divider CalculatorFind the output voltage of two resistors in series, with an optional load.Resistor Colour Code CalculatorRead the value of a 4, 5 or 6 band resistor, or find the colours for a value.Resistors in Series and Parallel CalculatorAdd resistors in series and parallel from a list of values such as 4.7k and 220.Capacitors in Series and Parallel CalculatorFind the total capacitance of capacitors in series and parallel from a list of values.LED Resistor CalculatorFind the series resistor for an LED from the supply, forward voltage and current.Voltage Drop Calculator (UK Cable)Estimate the voltage drop of a copper cable run and check it against the 3% and 5% limits.Battery Runtime CalculatorEstimate how long a battery will run a load, allowing for usable capacity and efficiency.RC Time Constant CalculatorFind the time constant, cut-off frequency and charging times for a resistor and capacitor.Wire Resistance CalculatorFind the resistance of a length of wire from its material, size and temperature.Decibel CalculatorConvert between decibels and power or voltage ratios, and between dBm and milliwatts.LC Resonant Frequency CalculatorFind the resonant frequency of an inductor and capacitor, with Q and bandwidth.Electrical Power CalculatorFind watts, volts or amps for direct current, single phase or three phase, with power factor and running cost.Inductive and Capacitive Reactance CalculatorFind the AC reactance of an inductor or a capacitor, and the impedance with a series resistor.Transformer CalculatorFind the turns ratio, secondary voltage, turns and currents of a transformer.
Physics Vedi tutti
Acceleration and SUVAT CalculatorSolve constant acceleration problems, including simple speed change over time, from any three of s, u, v, a and t.Projectile Motion CalculatorFind range, flight time and maximum height from launch speed, angle and height, including a simple drop.Wavelength and Frequency CalculatorConvert between wavelength and frequency for light, radio and sound, with photon energy.Specific Heat CalculatorFind the heat needed to change a temperature, or solve for mass, specific heat or temperature change.Half-Life CalculatorFind the amount remaining, time elapsed, half-life or starting amount for radioactive decay.Pendulum Period CalculatorFind the period and frequency of a pendulum from its length, with an allowance for wide swings.Force CalculatorSolve for force, momentum, impulse, circular motion, gravity between masses or charge attraction.Work, Energy and Power CalculatorSolve kinetic energy, potential energy, work and power, or efficiency, filling in whichever value is missing.Pressure and Density CalculatorSolve pressure, density, the pressure at depth in a fluid, or whether an object floats.Orbital and Escape Velocity CalculatorFind the orbital speed, orbit time and escape speed at a height above a planet, moon or star.Refraction and Snell's Law CalculatorFind the angle light bends when it passes between materials, and the critical angle.Speed, Distance and Time CalculatorSolve for speed, distance or time, work out running pace and predict a race finish time.
Chemistry Vedi tutti
Molar Mass CalculatorWork out the molar mass of any chemical formula, with the mass percent of each element.Molarity CalculatorFind molarity, moles, volume, grams and number of particles for a solution, from a mass and formula or from moles.Dilution Calculator (C1V1 = C2V2)Find the volume of stock to use, the final concentration or final volume of a dilution.pH CalculatorFind pH, pOH and ion concentrations, including strong and weak acids and bases.Ideal Gas Law CalculatorFind pressure, volume, amount or temperature of a gas using PV = nRT.Percent Yield CalculatorFind the percent yield of a reaction, and the theoretical yield from the limiting reactant.Empirical Formula CalculatorFind the empirical formula, and the molecular formula, from masses or percentages.Periodic Table ExplorerAn interactive periodic table with the name, atomic number, mass, group, period and state of all 118 elements.
Engineering Vedi tutti
Gear Ratio CalculatorFind the gear ratio, output speed and output torque for one, two or three stages.Torque CalculatorFind torque from force and lever arm, or from power and rotational speed.Stress and Strain CalculatorFind stress, strain, elongation and Young's modulus for a bar under load.Dew Point CalculatorFind the dew point from temperature and humidity, or the humidity from the dew point.Thermal Expansion CalculatorFind how much a bar, pipe or beam grows or shrinks as the temperature changes.Pipe Flow Velocity CalculatorFind the flow rate, velocity or pipe diameter from the other two, with Reynolds number for water.Feels Like Temperature (Wind Chill and Heat Index)Find how hot or cold it feels from temperature, wind and humidity: wind chill when cold, heat index when hot.
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Guide da leggere per prime
Speed, distance and time: formulas and worked examples
Use the speed distance time triangle to find any of the three, convert mph, km/h and m/s, work out average speed correctly, and plan journeys and runs.
MPG, litres per 100 km and fuel cost per mile explained
Work out your real mpg from a tank, convert mpg to litres per 100 km, and calculate fuel cost per mile and for a journey, with worked UK examples.