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Table 2: Base Planck units
Name	Dimension	Expressions	SI equivalent with uncertainties^[1]	Other equivalent
Planck length	Length (L)	$l_{\text{P}}={\sqrt {\frac {\hbar G}{c^{3}}}}$	1.616 252(81) × 10⁻³⁵ m
Planck mass	Mass (M)	$m_{\text{P}}={\sqrt {\frac {\hbar c}{G}}}$	2.176 44(11) × 10⁻⁸ kg	1.220 862(61)× 10¹⁹ GeV/c²
Planck time	Time (T)	$t_{\text{P}}={\frac {l_{\text{P}}}{c}}={\frac {\hbar }{m_{\text{P}}c^{2}}}={\sqrt {\frac {\hbar G}{c^{5}}}}$	5.391 24(27) × 10⁻⁴⁴ s
Planck charge	Electric charge (Q)	$q_{\text{P}}={\sqrt {4\pi \varepsilon _{0}\hbar c}}$	1.875 545 870(47) × 10⁻¹⁸ C	11.706 237 6398(40) e
Planck temperature	Temperature (Θ)	$T_{\text{P}}={\frac {m_{\text{P}}c^{2}}{k_{B}}}={\sqrt {\frac {\hbar c^{5}}{Gk_{B}^{2}}}}$	1.416 785(71) × 10³² K

^ Cite error: The named reference CODATA was invoked but never defined (see the help page).

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