Rontojoule is 1e-27 joule units.
Rontojoules to Zeptojoules Converter — rJ to zJ
Convert Rontojoule (rJ) to Zeptojoule (zJ) using the exact conversion factor (1 rontojoule = 0.000001 zeptojoule). See the formula, worked examples, and conversion table.
Rontojoules to Zeptojoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Zeptojoule is 1e-21 joule units.
Result = input x 1e-27 / 1e-21.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Rontojoules to Zeptojoules
Rontojoule and Zeptojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Rontojoule is 1e-27 joule units, and zeptojoule is 1e-21 joule units.
Formula
zeptojoules = rontojoules × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 rontojoule equals 1e-27 base units, and 1 zeptojoule equals 1e-21 base units, so dividing one by the other gives the direct rontojoule-to-zeptojoule factor of 0.000001.
Simple example
1 rJ × 0.000001 = 0.000001 zJ
1 rontojoule = 0.000001 zeptojoules.
Real-world example
100 rJ × 0.000001 = 0.0001 zJ
100 rontojoules = 0.0001 zeptojoules.
Conversion table
| Rontojoule (rJ) | Zeptojoule (zJ) |
|---|---|
| 1 rJ | 0.000001 zJ |
| 10 rJ | 0.00001 zJ |
| 100 rJ | 0.0001 zJ |
| 500 rJ | 0.0005 zJ |
| 1,000 rJ | 0.001 zJ |
| 2,000 rJ | 0.002 zJ |
Reverse conversion: Zeptojoule to Rontojoule
0.000001 zJ × 1000000 = 1 rJ
0.000001 zeptojoules = 1 rontojoules.
rontojoules = zeptojoules × 1000000
For a page dedicated to this direction, see Zeptojoule to Rontojoule.
Understanding the Rontojoule (rJ)
Rontojoule is 1e-27 joule units.
Understanding the Zeptojoule (zJ)
Zeptojoule is 1e-21 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptojoules are in 1 rontojoule?
1 rontojoule equals 0.000001 zeptojoules, using the exact defined conversion factor rather than an estimate.
How do I convert rontojoule to zeptojoule?
Multiply the rontojoule value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert zeptojoule back to rontojoule?
Use the reverse factor: 1 zeptojoule equals 1,000,000 rontojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a rontojoule?
Rontojoule (rJ) is a unit of energy.
What is a zeptojoule?
Zeptojoule (zJ) is a unit of energy.
Is the rontojoule to zeptojoule conversion exact?
Yes. Both rontojoule and zeptojoule are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.