Convert Gigameter to Foot
Convert gigameters to feet instantly. 1 gigameter = 3.28084e+9 foot — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Foot to Gigameter converter for the reverse conversion.
Units explained
Gigameter
A gigameter is a metric unit of length equal to one billion meters (1×10⁹ m). It is most often used in astronomy and astrophysics when expressing distances within the inner solar system.
The gigameter uses the SI prefix giga- (from Greek gigas, giant), adopted by the CGPM in 1960 to denote multiplication by one billion (10⁹).
Gigameters are used to express distances such as the Sun's diameter (~1.39 Gm), the Earth–Moon distance (~0.384 Gm), and similar inner-solar-system scales. Astronomical units and light-seconds are also common for these distances.
SI prefix giga- adopted in 1960; the gigameter became standard in astronomy for sub-AU distances by the late 20th century.
Foot
A foot is an Imperial and US customary unit of length equal to 12 inches or exactly 0.3048 meters. It is the most commonly used unit of length in everyday measurement in the United States.
The foot's origin is literally the length of a human foot, used as a measurement standard since antiquity. The English foot was standardized at various points in history; the modern international foot (0.3048 m exactly) was fixed by the 1959 International Yard and Pound Agreement.
Feet are used in the US for body height, building dimensions, room sizes, road sign clearances, aviation altitude (feet above sea level), and most everyday distance estimation. The UK uses feet informally for height despite officially being metric.
Used since antiquity; standardized to 0.3048 m exactly by the International Yard and Pound Agreement of 1959. Aviation worldwide uses feet for altitude despite metric adoption elsewhere.
Gigameter to Foot conversion formula
The relationship between gigameters and feet:
To convert gigameters to feet, multiply the value in gigameters by 3.28084e+9. To reverse, multiply feet by 3.048e-10.
How to use this converter
Type a value into the calculator. The result in feet updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Foot to Gigameter converter for the reverse direction.
Step-by-step: convert gigameters to feet
- Write down the value in gigameters (Gm).
- Multiply that value by the factor 3.28084e+9.
- The product is the equivalent value in feet (ft).
- To reverse, multiply the foot value by 3.048e-10.
Worked examples
Example 1 — Convert 1 Gm to ft:
1 × 3.28084e+9 = 3.28084e+9 ft
Example 2 — Convert 100 Gm to ft:
100 × 3.28084e+9 = 3.28084e+11 ft
Gigameter to Foot conversion table
Standard reference values for converting gigameters to feet:
| Gigameter [Gm] | Foot [ft] |
|---|---|
| 0.01 | 3.28084e+7 |
| 0.1 | 3.28084e+8 |
| 1 | 3.28084e+9 |
| 2 | 6.56168e+9 |
| 3 | 9.84252e+9 |
| 4 | 1.312336e+10 |
| 5 | 1.64042e+10 |
| 10 | 3.28084e+10 |
| 20 | 6.56168e+10 |
| 30 | 9.84252e+10 |
| 40 | 1.312336e+11 |
| 50 | 1.64042e+11 |
| 100 | 3.28084e+11 |
| 500 | 1.64042e+12 |
| 1000 | 3.28084e+12 |
Frequently asked questions
How many feet is 1 gigameter?
How do I convert gigameters to feet?
How do I convert feet back to gigameters?
How many feet is 100 gigameters?
Popular length unit conversions
Convert Gigameter to other length units
Show all Gigameter conversions
Metric / SI (17 units)
Imperial / US Customary (4 units)
Sources & references
Conversion factor (1 Gm = 3.28084e+9 ft) 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.