Zettasievert is 1e+21 sievert units.
Zettasieverts to Petasieverts Converter — ZSv to PSv
Convert Zettasievert (ZSv) to Petasievert (PSv) using the exact conversion factor (1 zettasievert = 1,000,000 petasievert). See the formula, worked examples, and conversion table.
Zettasieverts to Petasieverts converter
Converter
Radiation Converter
Convert radioactivity, absorbed dose, and equivalent dose units by compatible radiation family.
Context values
Some unit families need one extra value for a physically accurate result.
Petasievert is 1000000000000000 sievert units.
Result = input x 1e+21 / 1e+15.
Equivalent Dose units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Zettasieverts to Petasieverts
Zettasievert and Petasievert both belong to the radiation-measurement family, though radiation quantities fall into genuinely distinct categories: absorbed dose (gray, rad) measures energy deposited in matter, equivalent dose (sievert, rem) weights that for biological harm, and activity (becquerel, curie) measures how often a radioactive source decays — this page only converts between units of the same kind. Specifically: Zettasievert is 1e+21 sievert units, and petasievert is 1000000000000000 sievert units.
Formula
petasieverts = zettasieverts × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 zettasievert equals 1e+21 base units, and 1 petasievert equals 1e+15 base units, so dividing one by the other gives the direct zettasievert-to-petasievert factor of 1000000.
Simple example
1 ZSv × 1000000 = 1,000,000 PSv
1 zettasievert = 1,000,000 petasieverts.
Real-world example
10 ZSv × 1000000 = 10,000,000 PSv
10 zettasieverts = 10,000,000 petasieverts.
Conversion table
| Zettasievert (ZSv) | Petasievert (PSv) |
|---|---|
| 0.001 ZSv | 1,000 PSv |
| 0.01 ZSv | 10,000 PSv |
| 0.1 ZSv | 100,000 PSv |
| 1 ZSv | 1,000,000 PSv |
| 10 ZSv | 10,000,000 PSv |
| 100 ZSv | 100,000,000 PSv |
Reverse conversion: Petasievert to Zettasievert
1 PSv × 0.000001 = 0.000001 ZSv
1 petasievert = 0.000001 zettasieverts.
zettasieverts = petasieverts × 0.000001
For a page dedicated to this direction, see Petasievert to Zettasievert.
Understanding the Zettasievert (ZSv)
Zettasievert is 1e+21 sievert units.
Understanding the Petasievert (PSv)
Petasievert is 1000000000000000 sievert units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petasieverts are in 1 zettasievert?
1 zettasievert equals 1,000,000 petasieverts, using the exact defined conversion factor rather than an estimate.
How do I convert zettasievert to petasievert?
Multiply the zettasievert value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert petasievert back to zettasievert?
Use the reverse factor: 1 petasievert equals 0.000001 zettasieverts. You can also use the swap control in the converter above to flip the direction instantly.
What is a zettasievert?
Zettasievert (ZSv) is a unit of radiation.
What is a petasievert?
Petasievert (PSv) is a unit of radiation.
Is the zettasievert to petasievert conversion exact?
Yes. Both zettasievert and petasievert are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.
What's the difference between absorbed dose, equivalent dose, and activity?
Absorbed dose (gray, rad) measures the energy radiation deposits in matter. Equivalent dose (sievert, rem) adjusts that figure for how harmful different types of radiation are to biological tissue. Activity (becquerel, curie) measures how often a radioactive source decays, independent of how much dose a person actually receives from it.