Physics basics: SI units

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Library edition words from NIST

The seven base units, and the 22 named units with their formulas: newton = kg m s⁻².

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Words from
The International System of Units, NIST SP 330 (2019). A U.S. government work, free to use.
Edition
NIST Special Publication 330, 2019 edition, Tables 2 and 4
Checked
Word for word against the source, on 16 October 2026.
How it was made
Each unit’s row from the tables.Powers lost in the PDF are put back as superscripts, and the raised “o” of °C is printed as a degree sign.
Edited by
Aheadso chose the cards and set them out.Every word on them is the source’s.
On the shelf
Science · 29 cards · 2 topics

The cards

  1. timeBase unitssecond (s)
  2. lengthBase unitsmeter (m)
  3. massBase unitskilogram (kg)
  4. electric currentBase unitsampere (A)
  5. thermodynamic temperatureBase unitskelvin (K)
  6. amount of substanceBase unitsmole (mol)
  7. luminous intensityBase unitscandela (cd)
  8. plane angleUnits with special namesradian (rad) = m/m
  9. solid angleUnits with special namessteradian (sr) = m²/m²
  10. frequencyUnits with special nameshertz (Hz) = s⁻¹
  11. forceUnits with special namesnewton (N) = kg m s⁻²
  12. pressure, stressUnits with special namespascal (Pa) = kg m⁻¹ s⁻²
All 29 cards
  1. energy, work, amount of heatUnits with special namesjoule (J) = kg m² s⁻² = N m
  2. power, radiant fluxUnits with special nameswatt (W) = kg m² s⁻³ = J/s
  3. electric chargeUnits with special namescoulomb (C) = A s
  4. electric potential differenceUnits with special namesvolt (V) = kg m² s⁻³ A⁻¹ = W/A
  5. capacitanceUnits with special namesfarad (F) = kg⁻¹ m⁻² s⁴ A² = C/V
  6. electric resistanceUnits with special namesohm (Ω) = kg m² s⁻³ A⁻² = V/A
  7. electric conductanceUnits with special namessiemens (S) = kg⁻¹ m⁻² s³ A² = A/V
  8. magnetic fluxUnits with special namesweber (Wb) = kg m² s⁻² A⁻¹ = V s
  9. magnetic flux densityUnits with special namestesla (T) = kg s⁻² A⁻¹ = Wb/m²
  10. inductanceUnits with special nameshenry (H) = kg m² s⁻² A⁻² = Wb/A
  11. Celsius temperatureUnits with special namesdegree Celsius (°C) = K
  12. luminous fluxUnits with special nameslumen (lm) = cd sr
  13. illuminanceUnits with special nameslux (lx) = cd sr m⁻² = lm/m²
  14. activity referred to a radionuclideUnits with special namesbecquerel (Bq) = s⁻¹
  15. absorbed dose, kermaUnits with special namesgray (Gy) = m² s⁻² = J/kg
  16. dose equivalentUnits with special namessievert (Sv) = m² s⁻² = J/kg
  17. catalytic activityUnits with special nameskatal (kat) = mol s⁻¹

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