Energieumrechnung
BTU und Joule
Required Parameters
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Quick Answer
1 Joule = 1 Watt-second. 1 kWh = 3,600,000 J = 3.6 MJ. 1 BTU = 1,055 J. 1 calorie = 4.184 J. Energy conversion is fundamental for comparing electrical, thermal, and mechanical power sources.
Energieumrechner
Konvertieren Sie zwischen Energieeinheiten: Joule, Kilowattstunden, Kalorien, BTU und Elektronenvolt.
Design Notes
In electronics, energy is most commonly expressed in watt-hours (Wh) for batteries and kWh for mains power. Joules appear in capacitor energy calculations (E = ½CV²) and ESD specifications.
Common Mistakes
- 1
Confusing energy (Joules, kWh) with power (Watts) — power is the RATE of energy transfer.
- 2
Mixing up calories (cal, 4.184 J) with food Calories (Cal = kcal = 4,184 J).
- 3
Comparing battery capacity in mAh across different voltages without converting to Wh first.
Knowledge Base
Was ist 1 Joule in Wattsekunden?
1 Joule = 1 Wattsekunde exakt. 1 kWh = 3.600.000 Joule = 3,6 MJ.
Was ist ein BTU?
1 BTU = 1.055,06 Joule. Energie um 1 Pfund Wasser um 1°F zu erwärmen. Wird in HLK-Technik verwendet.
Was ist der Unterschied Kalorie vs. Kilokalorie?
1 cal = 4,184 J (Physik). 1 Cal = 1 kcal = 4.184 J (Lebensmittel). Bei Nährwertangaben immer kcal gemeint.
Wie viel Energie speichert ein Kondensator?
E = ½CV² in Joule. 1000µF bei 400V = 80J. Zum Vergleich: AA-Batterie ≈ 13.500J.
Was ist der Unterschied zwischen Energie und Leistung?
Energie (J, kWh) = Gesamtarbeit. Leistung (W) = Energierate. Leistung × Zeit = Energie.
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