Planck constant

Symbol: h

✓ Exact value by definition

Raw Data

{
  "id": "planck-constant",
  "label": "Planck constant",
  "symbol": "h",
  "quantity": {
    "value": 6.62607015e-34,
    "unit": "J s",
    "exact": true,
    "source": {
      "name": "SI definition",
      "url": "https://www.bipm.org/en/measurement-units"
    }
  },
  "sameAs": [
    "https://www.wikidata.org/entity/Q483261"
  ],
  "tags": [
    "physics",
    "constant"
  ]
}