1 E-21 J

To help compare different orders of magnitude we list here energies between 10⁻²¹ joule and 10⁻²⁰ joule (0.0062 and 0.062 eV).

Weaker energies
1.602 × 10⁻²¹ J – 0.01 eV
4.37 × 10⁻²¹ J (0.0273 eV) – Average kinetic energy of a molecule at room temperature
Stronger energies

Orders of magnitude (energy) SI unit: joule Conversion of units#Energy, work, or heat
1 E-30 J	1 E-24 J	1 E-18 J	1 E-12 J	1 E-6 J	1 J	1 E6 J	1 E12 J	1 E18 J	1 E24 J	1 E30 J
1 E-29 J	1 E-23 J	1 E-17 J	1 E-11 J	1 E-5 J	10 J	1 E7 J	1 E13 J	1 E19 J	1 E25 J
1 E-28 J	1 E-22 J	1 E-16 J	1 E-10 J	1 E-4 J	100 J	1 E8 J	1 E14 J	1 E20 J	1 E26 J	1 E40 J
1 E-27 J	1 E-21 J	1 E-15 J	1 E-9 J	1 E-3 J	1000 J	1 E9 J	1 E15 J	1 E21 J	1 E27 J
1 E-26 J	1 E-20 J	1 E-14 J	1 E-8 J	1 E-2 J	10000 J	1 E10 J	1 E16 J	1 E22 J	1 E28 J
1 E-25 J	1 E-19 J	1 E-13 J	1 E-7 J	1 E-1 J	100,000 J	1 E11 J	1 E17 J	1 E23 J	1 E29 J	1 E50 J