Physics
Explore motion, sound, light, electricity and units with calculators and simulations that show the formulas and the numbers.
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Utilities
- Airspeed converterIndicated, true and equivalent airspeed and Mach number at any altitude and temperature, with the 2% rule of thumb beside the exact answer., private, runs on your deviceAviationCalculatorFlyingSpeedConverter
- Density altitudePressure and density altitude of your airfield from elevation, QNH and temperature, with what the thin air means for take-off., private, runs on your deviceAviationCalculatorFlyingWeatherTemperature
- Density converterConvert between kg/m³, g/cm³, kg/L, g/L, lb/ft³, lb/in³, oz/in³ and pounds per gallon., private, runs on your deviceUnit conversionConverterWeightVolume & capacityMetricImperial
- Dew point calculatorFind the dew point from temperature and humidity, or the humidity from the dew point., private, runs on your deviceEarth & weatherCalculatorWeatherTemperature
- Energy converterConvert between joules, kilowatt-hours, kilocalories, BTU and more, using exact definitions., private, runs on your deviceUnit conversionConverterEnergyMetric
- Force converterConvert between newtons, kilonewtons, kilogram-force, pound-force, kips, dynes and poundals., private, runs on your deviceUnit conversionConverterMetricImperial
- Length ConverterConvert between metric and imperial lengths, exactly., private, runs on your deviceUnit conversionConverterLengthDistanceMetricImperial
- Ohm's law calculatorGive any two of voltage, current, resistance and power to get the other two., private, runs on your deviceCalculator
- Power converterConvert between watts, kilowatts, megawatts, horsepower, metric horsepower and BTU per hour, exactly., private, runs on your deviceUnit conversionConverterEnergyMetric
- Pressure converterConvert between pascals, hectopascals, kilopascals, bar, psi, atmospheres, mmHg and inHg., private, runs on your deviceUnit conversionConverterMetricImperial
- Resistor colour code calculatorTurn 4, 5 or 6 colour bands into ohms and tolerance, or find the bands of a value., private, runs on your deviceCalculator
- Series and parallel calculatorCombine 2 to 12 resistors or capacitors and see the equivalent value., private, runs on your deviceCalculator
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- Speed converterConvert between kilometres per hour, miles per hour, metres per second, knots and feet per minute., private, runs on your deviceUnit conversionConverterSpeedMetricImperial
- Standard atmosphere (ISA)The ICAO standard atmosphere at any altitude or flight level, on a standard day or a warmer or colder one., private, runs on your deviceAviationCalculatorFlyingTemperatureWeather
- Temperature ConverterCelsius, Fahrenheit, kelvin, Rankine and oven gas marks, exactly., private, runs on your deviceUnit conversionConverterTemperatureMetricImperial
- Tone GeneratorPlay a test tone from 1 Hz to 20 kHz and see its note, period and wavelength., private, runs on your deviceGeneratorSoundFrequencies
- Torque converterConvert between newton metres, foot-pounds, inch-pounds, kilogram-force metres and more., private, runs on your deviceUnit conversionConverterMetricImperial
- Weight converterConvert between kilograms, grams, pounds, ounces, stone, tons, carats and more, exactly., private, runs on your deviceUnit conversionConverterWeightMetricImperial
- Wind chill and heat indexThe feels-like temperature: wind chill in the cold, heat index in the heat., private, runs on your deviceEarth & weatherCalculatorWeatherTemperature
- Wire gauge converterConvert AWG to mm², kcmil and diameter, with the copper resistance per kilometre., private, runs on your deviceUnit conversionConverter
Physics tools show the formula behind every number and let you change the inputs to see what happens.
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