Convert light-years to inches
1 ly = 372469703645000000 in — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
How to convert light-years to inches
Multiply the number of light-years by 372469703645000000 to get inches.
Light-year: Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
Inch: Defined as exactly 25.4 mm by the 1959 international yard and pound agreement.
Light-year to Inch conversion table
| Light-years (ly) | Inches (in) |
|---|---|
| 1 ly | 3.724697e+17 |
| 2 ly | 7.4493941e+17 |
| 3 ly | 1.1174091e+18 |
| 5 ly | 1.8623485e+18 |
| 10 ly | 3.724697e+18 |
| 20 ly | 7.4493941e+18 |
| 25 ly | 9.3117426e+18 |
| 50 ly | 1.8623485e+19 |
| 100 ly | 3.724697e+19 |
| 250 ly | 9.3117426e+19 |
| 500 ly | 1.8623485e+20 |
| 1000 ly | 3.724697e+20 |
Inch to Light-year conversion table
| Inches (in) | Light-years (ly) |
|---|---|
| 1 in | 2.6847821e-18 |
| 2 in | 5.3695642e-18 |
| 3 in | 8.0543464e-18 |
| 5 in | 1.3423911e-17 |
| 10 in | 2.6847821e-17 |
| 20 in | 5.3695642e-17 |
| 25 in | 6.7119553e-17 |
| 50 in | 1.3423911e-16 |
| 100 in | 2.6847821e-16 |
| 250 in | 6.7119553e-16 |
| 500 in | 1.3423911e-15 |
| 1000 in | 2.6847821e-15 |
Frequently asked
How many inches are in a light-year?
One light-year equals 3.724697036e+17 inches (ly → in). That figure is exact, not rounded.
How do you convert light-years to inches?
Multiply the number of light-years by 372469703645000000 to get inches.
What is 1 in in light-years?
One inch is 2.684782118e-18 light-years.
What is 10 ly in in?
10 ly = 3.724697e+18 in.
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 inch?
Defined as exactly 25.4 mm by the 1959 international yard and pound agreement.