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A quad is a unit of energy equal to 10^15 (a short-scale quadrillion) BTU, or 1.055 x 10^18 joules (1.055 exajoules or EJ) in SI units. The unit is used by the U.S. Department o ..more definition+
In relation to the base unit of [energy] => (joules), 1 Rydberg (Ry) is equal to 2.179872E-18 joules, while 1 Quads (quad) = 1.05505585262E+18 joules.| 644600 Rydberg | to common energy units |
|---|---|
| 644600 Ry | = 1.4051454912E-12 joules (J) |
| 644600 Ry | = 1.4051454912E-15 kilojoules (kJ) |
| 644600 Ry | = 3.3583783250478E-13 calories (cal) |
| 644600 Ry | = 3.3583783250478E-16 kilocalories (kcal) |
| 644600 Ry | = 8770209.908999 electron volt (eV) |
| 644600 Ry | = 3.90318192E-16 watt hour (Wh) |
| 644600 Ry | = 322300 atomic unit of energy (au) |
| 644600 Ry | = 3.3583783250478E-22 tons of TNT (tTNT) |
| 644600 Ry | = 1.0363821285367E-12 foot pound force (ft lbf) |
| 644600 Ry | = 1.4051454912E-5 ergs (ergs) |