A parsec is about 3.26156 light-years.
Parsecs to Feet Converter — pc to ft
Convert Parsec (pc) to Foot (ft) using the exact conversion factor (1 parsec = 1.012361e+17 foot). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Parsecs to Feet converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
A foot is exactly 0.3048 meters.
Result = input x 3.08567758e+16 / 0.3048.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Parsecs to Feet
Parsec and Foot both measure length. Parsec is typically associated with standard distance unit throughout professional astronomy worldwide, while Foot is typically associated with united States (height, construction, aviation altitude).
Formula
feet = parsecs × 1.012361e+17
This factor comes from each unit's defined relationship to the category's base unit: 1 parsec equals 3.085678e+16 base units, and 1 foot equals 0.3048 base units, so dividing one by the other gives the direct parsec-to-foot factor of 1.012361e+17.
Simple example
1 pc × 1.012361e+17 = 1.012361e+17 ft
1 parsec = 1.012361e+17 feet.
Real-world example
10 pc × 1.012361e+17 = 1.012361e+18 ft
10 parsecs = 1.012361e+18 feet.
Conversion table
| Parsec (pc) | Foot (ft) |
|---|---|
| 1 pc | 1.012361e+17 ft |
| 5 pc | 5.061807e+17 ft |
| 10 pc | 1.012361e+18 ft |
| 21.0975 pc | 2.135829e+18 ft |
| 42.195 pc | 4.271659e+18 ft |
| 100 pc | 1.012361e+19 ft |
Reverse conversion: Foot to Parsec
1.012361e+17 ft × 9.877895e-18 = 0.9999995938 pc
1.012361e+17 feet = 0.9999995938 parsecs.
parsecs = feet × 9.877895e-18
For a page dedicated to this direction, see Foot to Parsec.
Parsec vs. Foot
| Aspect | Parsec | Foot |
|---|---|---|
| Family | non-SI unit used in astronomy | US/imperial customary unit |
| Typical use | Measuring distances to nearby stars via parallax | Height measurement in the US and UK |
| Where it's used | Standard distance unit throughout professional astronomy worldwide | United States (height, construction, aviation altitude) |
Understanding the Parsec
Parsec (pc) measures astronomical distance. The distance at which one astronomical unit subtends an angle of one arcsecond — approximately 3.26 light-years, or about 3.086 × 10¹⁶ meters. It is classified as a non-SI unit used in astronomy.
Where it's used: Standard distance unit throughout professional astronomy worldwide
Uses of the Parsec today
- Measuring distances to nearby stars via parallax
- Galactic and extragalactic distance scales in astrophysics research
History of the Parsec
The name is a portmanteau of 'parallax' and 'arcsecond,' reflecting how the unit is defined directly from the parallax method astronomers use to measure stellar distances: the tiny apparent shift in a nearby star's position as Earth orbits the Sun.
Historical origin. Parsec was not the invention of a single named person; it developed through the process described above.
Understanding the Foot
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
Where it's used: United States (height, construction, aviation altitude) United Kingdom (height, some construction contexts)
Uses of the Foot today
- Height measurement in the US and UK
- US construction and real estate (square footage)
- Aviation altitude worldwide (feet remain standard even in metric countries)
History of the Foot
The foot has ancient roots (Roman 'pes', various regional English feet), standardized into the modern English foot over centuries. The international foot (exactly 0.3048 m) was fixed by the 1959 International Yard and Pound Agreement, resolving small historical differences between US and UK measurements.
Historical origin. Foot was not the invention of a single named person; it developed through the process described above.
Parsec — sources
- IAU (International Astronomical Union) — parsec definition — Standard astronomical definition of the parsec via stellar parallax.
Foot — sources
- NIST — International yard and pound (1959) — Fixes the modern foot at exactly 0.3048 meters.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many feet are in 1 parsec?
1 parsec equals 1.012361e+17 feet, using the exact defined conversion factor rather than an estimate.
How do I convert parsec to foot?
Multiply the parsec value by 1.012361e+17. The converter above does this instantly to whatever precision you set.
How do I convert foot back to parsec?
Use the reverse factor: 1 foot equals 9.877895e-18 parsecs. You can also use the swap control in the converter above to flip the direction instantly.
What is a parsec?
Parsec (pc) measures astronomical distance. The distance at which one astronomical unit subtends an angle of one arcsecond — approximately 3.26 light-years, or about 3.086 × 10¹⁶ meters. It is classified as a non-SI unit used in astronomy.
What is a foot?
Foot (ft) measures distance. The international foot is defined as exactly 0.3048 meters. It is classified as a US/imperial customary unit.
Is the parsec to foot conversion exact?
Yes. The international foot is defined as exactly 0.3048 meters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the parsec still used today?
Standard distance unit throughout professional astronomy worldwide