Convert light-years to feet
1 ly = 31039141970400000 ft — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
3.10391419704e+16ft
As a fraction: 3941971030242000000/127
1 ly = 31039141970400000 ft
How to convert light-years to feet
Multiply the number of light-years by 31039141970400000 to get feet.
Light-year: Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
Foot: Exactly 0.3048 m, i.e. 12 international inches.
Light-year to Foot conversion table
| Light-years (ly) | Feet (ft) |
|---|---|
| 1 ly | 3.1039142e+16 |
| 2 ly | 6.2078284e+16 |
| 3 ly | 9.3117426e+16 |
| 5 ly | 1.5519571e+17 |
| 10 ly | 3.1039142e+17 |
| 20 ly | 6.2078284e+17 |
| 25 ly | 7.7597855e+17 |
| 50 ly | 1.5519571e+18 |
| 100 ly | 3.1039142e+18 |
| 250 ly | 7.7597855e+18 |
| 500 ly | 1.5519571e+19 |
| 1000 ly | 3.1039142e+19 |
Foot to Light-year conversion table
| Feet (ft) | Light-years (ly) |
|---|---|
| 1 ft | 3.2217385e-17 |
| 2 ft | 6.4434771e-17 |
| 3 ft | 9.6652156e-17 |
| 5 ft | 1.6108693e-16 |
| 10 ft | 3.2217385e-16 |
| 20 ft | 6.4434771e-16 |
| 25 ft | 8.0543464e-16 |
| 50 ft | 1.6108693e-15 |
| 100 ft | 3.2217385e-15 |
| 250 ft | 8.0543464e-15 |
| 500 ft | 1.6108693e-14 |
| 1000 ft | 3.2217385e-14 |
Frequently asked
How many feet are in a light-year?
One light-year equals 3.103914197e+16 feet (ly → ft). That figure is exact, not rounded.
How do you convert light-years to feet?
Multiply the number of light-years by 31039141970400000 to get feet.
What is 1 ft in light-years?
One foot is 3.221738542e-17 light-years.
What is 10 ly in ft?
10 ly = 3.1039142e+17 ft.
What exactly is a light-year?
Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
What exactly is a foot?
Exactly 0.3048 m, i.e. 12 international inches.