Microgram is 0.000001 gram units.
Micrograms to Petagrams Converter — ug to Pg
Convert Microgram (ug) to Petagram (Pg) using the exact conversion factor (1 microgram = 1e-21 petagram). See the formula, worked examples, and conversion table.
Micrograms to Petagrams converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
Petagram is 1000000000000000 gram units.
Result = input x 1e-9 / 1e+12.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Micrograms to Petagrams
Weight conversions between Microgram and Petagram come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Specifically: Microgram is 0.000001 gram units, and petagram is 1000000000000000 gram units.
Formula
petagrams = micrograms × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 microgram equals 1e-9 base units, and 1 petagram equals 1e+12 base units, so dividing one by the other gives the direct microgram-to-petagram factor of 1e-21.
Simple example
1 ug × 1e-21 = 1e-21 Pg
1 microgram = 1e-21 petagrams.
Real-world example
50 ug × 1e-21 = 5e-20 Pg
50 micrograms = 5e-20 petagrams.
Conversion table
| Microgram (ug) | Petagram (Pg) |
|---|---|
| 1 ug | 1e-21 Pg |
| 5 ug | 5e-21 Pg |
| 10 ug | 1e-20 Pg |
| 25 ug | 2.5e-20 Pg |
| 50 ug | 5e-20 Pg |
| 100 ug | 1e-19 Pg |
Reverse conversion: Petagram to Microgram
1e-21 Pg × 1e+21 = 1 ug
1e-21 petagrams = 1 micrograms.
micrograms = petagrams × 1e+21
For a page dedicated to this direction, see Petagram to Microgram.
Understanding the Microgram (ug)
Microgram is 0.000001 gram units.
Understanding the Petagram (Pg)
Petagram is 1000000000000000 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petagrams are in 1 microgram?
1 microgram equals 1e-21 petagrams, using the exact defined conversion factor rather than an estimate.
How do I convert microgram to petagram?
Multiply the microgram value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert petagram back to microgram?
Use the reverse factor: 1 petagram equals 1e+21 micrograms. You can also use the swap control in the converter above to flip the direction instantly.
What is a microgram?
Microgram (ug) is a unit of mass/weight.
What is a petagram?
Petagram (Pg) is a unit of mass/weight.
Is the microgram to petagram conversion exact?
Yes. Both microgram and petagram are defined by fixed standards rather than physical artifacts, so the factor of 1e-21 used above is exact to as many digits as you choose to display.