Convert joules to ergs

1 J = 10000000 erg — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.

10 000 000erg
✓ Exact 1 J = 10 000 000 erg
More converter tools

Readable results

Ranges, ± tolerances, feet/inches and clock durations work in the value field.

Unit picker

Export this result

1 J = 10000000 erg
Show this value in all 39 energy & work units
  • Petajoules PJ 1e-15
  • Terajoules TJ 1e-12
  • Gigajoules GJ 1e-9
  • Megajoules MJ 0.000 001
  • Kilojoules kJ 0.001
  • Joules J 1
  • Millijoules mJ 1000
  • Microjoules µJ 1 000 000
  • Nanojoules nJ 1 000 000 000
  • Watt-hours Wh 0.000 277 777 777 778
  • Kilowatt-hours kWh 0.000 000 277 777 777 778
  • Megawatt-hours MWh 2.77777777778e-10
  • Gigawatt-hours GWh 2.77777777778e-13
  • Terawatt-hours TWh 2.77777777778e-16
  • Calorie (thermochemical)s cal 0.239 005 736 138
  • Kilocalories kcal 0.000 239 005 736 138
  • Calorie (IT)s cal (IT) 0.238 845 896 627
  • Kilocalorie (IT)s kcal (IT) 0.000 238 845 896 627
  • British thermal units BTU 0.000 947 817 120 313
  • BTU (thermochemical)s BTU (th) 0.000 948 451 652 677
  • Million BTUs MMBTU 9.47817120313e-10
  • Therm (US)s thm 9.48043427973e-9
  • Therm (EC)s thm (EC) 9.47816987913e-9
  • Electronvolts eV 6.24150907446e+18
  • Kiloelectronvolts keV 6 241 509 074 460 000
  • Megaelectronvolts MeV 6 241 509 074 460
  • Gigaelectronvolts GeV 6 241 509 074.46
  • Teraelectronvolts TeV 6 241 509.074 46
  • Ergs erg 10 000 000
  • Foot-pounds ft·lbf 0.737 562 149 277
  • Inch-pounds in·lbf 8.850 745 791 33
  • Foot-poundals ft·pdl 23.730 360 404 2
  • Horsepower-hours hp·h 0.000 000 372 506 135 999
  • Tonne of TNTs t TNT 2.39005736138e-10
  • Kiloton of TNTs kt TNT 2.39005736138e-13
  • Megaton of TNTs Mt TNT 2.39005736138e-16
  • Hartrees Eₕ 2.2937122784e+17
  • Rydbergs Ry 4.58742455679e+17
  • Quads quad 9.47817120313e-19

Every row is Joule (J) converted through the joule, in exact rational arithmetic.

How to convert joules to ergs

Multiply the number of joules by 10000000 to get ergs.

The exact factor is 10000000 .

Joule to Erg conversion table

Joules (J) Ergs (erg)
1 J 10 000 000
2 J 20 000 000
3 J 30 000 000
5 J 50 000 000
10 J 100 000 000
20 J 200 000 000
25 J 250 000 000
50 J 500 000 000
100 J 1 000 000 000
250 J 2 500 000 000
500 J 5 000 000 000
1000 J 10 000 000 000

Erg to Joule conversion table

Ergs (erg) Joules (J)
1 erg 0.000 000 1
2 erg 0.000 000 2
3 erg 0.000 000 3
5 erg 0.000 000 5
10 erg 0.000 001
20 erg 0.000 002
25 erg 0.000 002 5
50 erg 0.000 005
100 erg 0.000 01
250 erg 0.000 025
500 erg 0.000 05
1000 erg 0.0001

Frequently asked

How many ergs are in a joule?

One joule equals 10000000 ergs (J → erg). That figure is exact, not rounded.

How do you convert joules to ergs?

Multiply the number of joules by 10000000 to get ergs.

What is 1 erg in joules?

One erg is 0.0000001 joules.

What is 10 J in erg?

10 J = 100 000 000 erg.

Related conversions

Settings

Theme

System follows your operating system and changes with it.

Text size
High contrast

Maximises text and border contrast and removes the grid background.

Graph-paper background

Round to
Notation
Thousands separators
Decimal mark
Nearest fraction

Shows the result as the nearest tape-measure fraction, with the error it costs.


Accessibility & interaction
Reduce motion Stops interface animations even when the operating system does not.
Underline links Keeps links visually distinct without relying on colour.
Larger touch targets Makes buttons and form controls easier to tap.
Shorter reading lines Limits article width for easier scanning.
Monochrome display Removes colour as an information cue.
Always-visible focus Makes the keyboard focus ring persistent and stronger.
Verbose screen-reader results Announces the complete conversion equation.
Sticky action bars Keeps converter and calculator actions within reach.
Select values on focus Replaces a value immediately when you start typing.
Left-handed mobile layout Moves key mobile actions toward the left thumb.

Your data

Settings, recent conversions and favourites live in this browser only. Nothing is sent anywhere.

Offline library