Chemistry › Constant
Mendeleev · Constant
Planck constant
Planck constant: exact SI value, unit and a compact reference for calculations.
ConstantSI
Exact SI value
6.626 070 15 × 10⁻³⁴
UnitJ·s
This value is exact in the International System of Units. It is not a rounded experimental measurement.
Keep the stated unit with the constant. The power of ten is part of the value.