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Temperature, Energy & Power Converters
Convert Celsius, Fahrenheit, joules, calories, watts, horsepower, BTU and kWh. 52 free tools that run in your browser, no sign-up needed.
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Temperature ConverterConvert °C, °F, K, °R and °Ré at once. Type in any field, with formulas and a range table.Celsius to FahrenheitConvert temperatures between °C and °F.Fahrenheit to CelsiusConvert temperatures from °F to °C and back.Watts to AmpsConvert watts to amps at any voltage, DC or AC.Kcal to kJConvert kilocalories to kilojoules (kcal to kJ) instantly, with formula and chart.kJ to KcalConvert kilojoules to kilocalories (kJ to kcal) instantly, with formula and chart.Joules to CaloriesConvert joules to calories (J to cal) instantly, with formula and chart.BTU to kWhConvert BTU to kilowatt-hours (BTU to kWh) instantly, with formula and chart.BTU to WattsConvert BTU per hour to watts (BTU/h to W) instantly, with formula and chart.Watts to BTUConvert watts to BTU per hour (W to BTU/h) instantly, with formula and chart.kW to HPConvert kilowatts to horsepower (kW to hp) instantly, with formula and chart.HP to kWConvert horsepower to kilowatts (hp to kW) instantly, with formula and chart.Celsius to KelvinConvert degrees Celsius to kelvins (°C to K) instantly, with formula and chart.Kelvin to CelsiusConvert kelvins to degrees Celsius (K to °C) instantly, with formula and chart.Fahrenheit to KelvinConvert degrees Fahrenheit to kelvins (°F to K) instantly, with formula and chart.Kelvin to FahrenheitConvert kelvins to degrees Fahrenheit (K to °F) instantly, with formula and chart.Amps to WattsConvert amps to watts (A to W) instantly, with formula and chart.kVA to kWConvert kilovolt-amperes to kilowatts (kVA to kW) instantly, with formula and chart.kW to AmpsConvert kilowatts to amps (kW to A) instantly, with formula and chart.Therms to kWhConvert therms to kilowatt-hours (thm to kWh) instantly, with formula and chart.HP to WattsConvert horsepower to watts (hp to W) instantly, with formula and chart.PS to HPConvert metric horsepower to horsepower (PS to hp) instantly, with formula and chart.Tons to BTUConvert tons of refrigeration to BTU per hour (TR to BTU/h) instantly, with formula and chart.kW to BTUConvert kilowatts to BTU per hour (kW to BTU/h) instantly, with formula and chart.Lux to Foot CandlesConvert lux to foot-candles (lx to fc) instantly, with formula and chart.Volts to WattsConvert volts to watts (V to W) instantly, with formula and chart.Watts to VoltsConvert watts to volts (W to V) instantly, with formula and chart.Amps to kWConvert amps to kilowatts (A to kW) instantly, with formula and chart.kW to kVAConvert kilowatts to kilovolt-amperes (kW to kVA) instantly, with formula and chart.VA to WattsConvert volt-amperes to watts (VA to W) instantly, with formula and chart.mAh to WhConvert milliamp-hours to watt-hours (mAh to Wh) instantly, with formula and chart.Wh to mAhConvert watt-hours to milliamp-hours (Wh to mAh) instantly, with formula and chart.Ah to mAhConvert amp-hours to milliamp-hours (Ah to mAh) instantly, with formula and chart.dBm to WattsConvert dBm to watts, milliwatts and dBW (and back) with voltage and a reference table.Tons (AC) to kWConvert tons of refrigeration to kilowatts (TR to kW) instantly, with formula and chart.Watts to kWConvert watts to kilowatts (W to kW) instantly, with formula and chart.Wh to kWhConvert watt-hours to kilowatt-hours (Wh to kWh) instantly, with formula and chart.Energy ConverterConvert joules, kJ, MJ, calories, kcal, Wh, kWh, BTU, therms, electron volts and foot-pounds at once.EV Efficiency ConverterConvert EV efficiency: kWh/100 mi, kWh/100 km, mi/kWh, km/kWh, Wh/km, Wh/mi and MPGe.Power ConverterConvert watts, kW, MW, horsepower, BTU/h, tons of refrigeration and kcal/h.SEER to EER ConverterConvert AC efficiency between SEER, SEER2, EER, EER2 and COP and compare yearly cooling costs.Watts to kWhConvert appliance watts and hours of use to kWh per day, month and year, plus cost.Watts to LumensConvert bulb watts to lumens for LED, CFL, halogen and incandescent bulbs.kVA to AmpsConvert kVA to amps for single-phase or three-phase circuits at any voltage.kW to kWhConvert kW and run time to kWh, with cost per run plus monthly and yearly totals.Audio Level ConverterConvert dBu, dBV, dBFS, volts RMS and peak-to-peak; compare pro and consumer line level.Light Illuminance ConverterConvert lux, foot-candles, phot and nox, plus nits and foot-lamberts for luminance.Joules to WattsConvert joules over a time (ms to hours) into watts with P = E/t, and back.kWh to kWConvert kWh used over any time period into average power in kW for bills, batteries and solar.Lumens to LuxConvert lumens to lux and foot-candles from an area or from beam angle and distance.Lumens to WattsFind how many watts you need for a given number of lumens with LED, CFL, halogen or incandescent bulbs.Volts to AmpsConvert volts to amps from watts (I = P/V) or ohms (I = V/R), for DC, single- and three-phase AC.
About Temperature, Energy & Power Converters
Convert temperatures between Celsius, Fahrenheit and Kelvin, and energy and power units such as joules, calories, kWh, watts, horsepower and BTU. They help with weather, cooking, nutrition labels and electricity bills alike.
Most used here: Temperature Converter, Celsius to Fahrenheit and Fahrenheit to Celsius.