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| 81 British Thermal Unit Thermochemical | to common energy units |
|---|---|
| 81 BTUth | = 85402.37141964 joules (J) |
| 81 BTUth | = 85.40237141964 kilojoules (kJ) |
| 81 BTUth | = 20411.656649054 calories (cal) |
| 81 BTUth | = 20.411656649054 kilocalories (kcal) |
| 81 BTUth | = 5.3303855633974E+23 electron volt (eV) |
| 81 BTUth | = 23.7228809499 watt hour (Wh) |
| 81 BTUth | = 1.9588850037901E+22 atomic unit of energy (au) |
| 81 BTUth | = 2.0411656649054E-5 tons of TNT (tTNT) |
| 81 BTUth | = 62989.556617645 foot pound force (ft lbf) |
| 81 BTUth | = 854023714196.4 ergs (ergs) |