Convert Petameter to Picometer
Convert petameters to picometers instantly. 1 petameter = 1e+27 picometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Picometer to Petameter converter for the reverse conversion.
Units explained
Petameter
A petameter is a metric unit of length equal to one quadrillion meters (1×10¹⁵ m). It is rarely used in everyday or scientific contexts; astronomers prefer the light-year or parsec for these scales.
The petameter uses the SI prefix peta- (from Greek penta, five, by analogy with the exponent's relation to thousand-cubed-cubed), adopted by the CGPM in 1975 to denote 10¹⁵.
Petameters could express interstellar-scale distances but are almost never used in practice. A light-year is approximately 9.46 Pm; astronomy uses light-years and parsecs as standard.
SI prefix peta- adopted in 1975; the petameter is rarely used because astronomy has well-established non-SI units (light-year, parsec) for this scale.
Picometer
A picometer is a metric unit of length equal to one trillionth of a meter (1×10⁻¹² m). It is the standard unit for expressing inter-atomic distances in chemistry and crystallography.
The picometer uses the SI prefix pico- (from Italian piccolo, meaning small), adopted by the CGPM in 1960 to denote one trillionth (10⁻¹²).
Picometers are the standard unit for atomic and molecular bond lengths, atomic radii, and X-ray crystallography measurements. For example, the carbon–carbon single bond is approximately 154 pm; the hydrogen atomic radius is about 53 pm.
SI prefix pico- adopted in 1960; the picometer largely replaced the angstrom (1 Å = 100 pm) in modern chemistry and crystallography literature after the 1980s.
Petameter to Picometer conversion formula
The relationship between petameters and picometers:
To convert petameters to picometers, multiply the value in petameters by 1e+27. To reverse, multiply picometers by 1e-27.
How to use this converter
Type a value into the calculator. The result in picometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Picometer to Petameter converter for the reverse direction.
Step-by-step: convert petameters to picometers
- Write down the value in petameters (Pm).
- Multiply that value by the factor 1e+27.
- The product is the equivalent value in picometers (pm).
- To reverse, multiply the picometer value by 1e-27.
Worked examples
Example 1 — Convert 1 Pm to pm:
1 × 1e+27 = 1e+27 pm
Example 2 — Convert 100 Pm to pm:
100 × 1e+27 = 1e+29 pm
Petameter to Picometer conversion table
Standard reference values for converting petameters to picometers:
| Petameter [Pm] | Picometer [pm] |
|---|---|
| 0.01 | 1e+25 |
| 0.1 | 1e+26 |
| 1 | 1e+27 |
| 2 | 2e+27 |
| 3 | 3e+27 |
| 4 | 4e+27 |
| 5 | 5e+27 |
| 10 | 1e+28 |
| 20 | 2e+28 |
| 30 | 3e+28 |
| 40 | 4e+28 |
| 50 | 5e+28 |
| 100 | 1e+29 |
| 500 | 5e+29 |
| 1000 | 1e+30 |
Frequently asked questions
How many picometers is 1 petameter?
How do I convert petameters to picometers?
How do I convert picometers back to petameters?
How many picometers is 100 petameters?
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Sources & references
Conversion factor (1 Pm = 1e+27 pm) 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.