Convert light years to feet
1 ly = 3.1039 × 10^16 ft. Change the amount below, or read the formula and the reference table further down.
1 light year equals
feet
1 ly = 3.1039 × 10^16 ft
The formula
Light years and feet both measure length from the same zero, so a single multiplier does the job.
ft = ly × 3.1039 × 10^16
Going the other way? Convert feet to light years.
Light years to feet table
Common values, rounded for reading.
| Light years (ly) | Feet (ft) |
|---|---|
| 1 | 3.1039 × 10^16 |
| 2 | 6.2078 × 10^16 |
| 3 | 9.3117 × 10^16 |
| 4 | 1.2416 × 10^17 |
| 5 | 1.5520 × 10^17 |
| 6 | 1.8623 × 10^17 |
| 7 | 2.1727 × 10^17 |
| 8 | 2.4831 × 10^17 |
| 9 | 2.7935 × 10^17 |
| 10 | 3.1039 × 10^17 |
| 15 | 4.6559 × 10^17 |
| 20 | 6.2078 × 10^17 |
| 25 | 7.7598 × 10^17 |
| 30 | 9.3117 × 10^17 |
| 40 | 1.2416 × 10^18 |
| 50 | 1.5520 × 10^18 |
| 75 | 2.3279 × 10^18 |
| 100 | 3.1039 × 10^18 |
| 250 | 7.7598 × 10^18 |
| 500 | 1.5520 × 10^19 |
| 1,000 | 3.1039 × 10^19 |
Questions people ask
- How many feet are in a light year?
- One light year equals 3.1039 × 10^16 feet.
- How do I convert light years to feet by hand?
- Multiply the number of light years by 3.1039 × 10^16. For a rough check, 3.1039 × 10^16 is close enough for most everyday use.
- What is 1 light year in feet?
- 1 light year is 3.1039 × 10^16 feet.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.