Electron charge to mass quotient = -1.758 820 008 38 × 1011 C·kg⁻¹

Value
-1.758 820 008 38 × 1011
Unit
C·kg⁻¹
Uncertainty
0.000 000 000 55 × 10¹¹
Copy-ready
-1.75882000838e11

The electron's charge divided by its mass, −e/mₑ.

Sets how tightly an electron beam curves in a magnetic field — the quantity J. J. Thomson first measured.

NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.

Electrical, thermal and X-ray constants

Angstrom starConductance quantumCopper x unitElectron charge to mass quotientFermi coupling constantFirst radiation constantHartree energyJosephson constantLattice parameter of siliconLattice spacing of ideal Si (220)Loschmidt constant (273.15 K, 101.325 kPa)Magnetic flux quantumMolar mass constantMolar mass of carbon-12Molar Planck constantMolar volume of siliconMolybdenum x unitNeutron-proton mass differenceProton charge to mass quotientQuantum of circulationSackur-Tetrode constant (1 K, 101.325 kPa)Second radiation constantVon Klitzing constantWeak mixing angleWien frequency displacement law constantW to Z mass ratio

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All physical constants

Constants and formula sheetElectrical, thermal and X-ray constantsAll calculators