Energy Converter
Convert energy units like joules, kilojoules, calories, kilowatt-hours, and BTUs efficiently.
About Energy Converter
Kilowatt-hours appear on electricity bills, calories on food labels and joules in physics equations. Tooloria’s Energy Converter translates between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU and electron volts. A cost estimator multiplies kWh by your tariff for instant bill checks. Everything runs offline, so consumption data is yours alone.
Frequently Asked Questions
Do you use thermochemical or IT calories?
Both. ‘cal_th’ (4.184 J) and ‘cal_IT’ (4.1868 J) appear separately. kCal on nutrition labels uses the thermochemical definition.
Can I see CO₂ emissions for kWh?
Enter your region’s grams-CO₂/kWh factor and the tool outputs emissions alongside energy units.
Are electron volts (eV) supported?
Yes—excellent for particle-physics homework. 1 eV = 1.602 176 634e-19 J per CODATA 2018.