Definition:Planck's Constant/Value

Planck's Constant: Value

\(\ds h\)

\(=\)

\(\ds 6 \cdotp 62607 \, 015 \times 10^{-34}\)

joule seconds

\(\quad\) This sequence is A003676 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).

\(\ds \)

\(=\)

\(\ds 6 \cdotp 62607 \, 015 \times 10^{-27}\)

erg seconds

Sources

• 1964: Milton Abramowitz and Irene A. Stegun: Handbook of Mathematical Functions ... (previous) ... (next): $2$. Physical Constants and Conversion Factors: Table $2.3$ Adjusted Values of Constants

which gives the mantissa as $6 \cdotp 626 \, 196$ with an uncertainty of $\pm 50$ corresponding to the $2$ least significant figures

• 1969: J.C. Anderson, D.M. Hum, B.G. Neal and J.H. Whitelaw: Data and Formulae for Engineering Students (2nd ed.) ... (previous) ... (next): $3.$ Physical Constants