Convert Picogram to Petagram
Convert picograms to petagrams instantly. 1 picogram = 1e-27 petagram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Petagram to Picogram converter for the reverse conversion.
Units explained
Picogram
A picogram (pg) equals 10^-15 kilogram.
From the SI prefix 'pico-' (from Spanish 'pico', a small quantity).
Single-cell biology and ultratrace chemical analysis.
The pico- prefix entered the SI in 1960.
Petagram
A petagram (Pg) equals 10^12 kilograms, equivalent to one gigatonne.
From the SI prefix 'peta-' (from Greek 'pente', five, the fifth power of 1000).
Common in climate science, where carbon budgets are expressed in petagrams of carbon.
The peta- prefix was adopted by the CGPM in 1975.
Picogram to Petagram conversion formula
The relationship between picograms and petagrams:
To convert picograms to petagrams, multiply the value in picograms by 1e-27. To reverse, multiply petagrams by 1e+27.
How to use this converter
Type a value into the calculator. The result in petagrams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Petagram to Picogram converter for the reverse direction.
Step-by-step: convert picograms to petagrams
- Write down the value in picograms (pg).
- Multiply that value by the factor 1e-27.
- The product is the equivalent value in petagrams (Pg).
- To reverse, multiply the petagram value by 1e+27.
Worked examples
Example 1 — Convert 1 pg to Pg:
1 × 1e-27 = 1e-27 Pg
Example 2 — Convert 100 pg to Pg:
100 × 1e-27 = 1e-25 Pg
Real-world example — Wavelengths across the spectrum
Optical and atomic-scale phenomena are routinely cross-converted between sub-micron units. A photon of wavelength 800 picograms can be re-expressed in petagrams for direct comparison with another instrument's calibration data sheet.
800 pg × 1e-27 = 8e-25 Pg
Real-world example — Molecular dimensions
The diameter of small molecular structures (around 2 picograms) is often converted into related sub-micron units when comparing measurements across different microscopy techniques or imaging modalities.
2 pg × 1e-27 = 2e-27 Pg
Picogram to Petagram conversion table
Standard reference values for converting picograms to petagrams:
| Picogram [pg] | Petagram [Pg] |
|---|---|
| 0.01 | 1e-29 |
| 0.1 | 1e-28 |
| 1 | 1e-27 |
| 2 | 2e-27 |
| 3 | 3e-27 |
| 4 | 4e-27 |
| 5 | 5e-27 |
| 10 | 1e-26 |
| 20 | 2e-26 |
| 30 | 3e-26 |
| 40 | 4e-26 |
| 50 | 5e-26 |
| 100 | 1e-25 |
| 500 | 5e-25 |
| 1000 | 1e-24 |
Frequently asked questions
How many petagrams is 1 picogram?
How do I convert picograms to petagrams?
How do I convert petagrams back to picograms?
How many petagrams is 100 picograms?
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Metric / SI (17 units)
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Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 pg = 1e-27 Pg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.