---
title: "Yards to Light-years — yd to ly converter"
description: "1 yard = 9.665 × 10^-17 light-years. Convert yards to light-years with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/yards-to-light-years/
site: "At One Place"
---

# Yards to light-years

**1 yard in light-years: 1 yd = 9.665 × 10^-17 ly**

ly = yd × 9.665215626 × 10^-17

To convert yards to light-years, multiply by 9.665215626 × 10^-17. The table below gives the values people look up most often, and the converter works for any number.

## Yards to light-years table

*Common yard values converted to light-years.*

| Yards | Light-years |
| --- | --- |
| 1 yd | 9.665 × 10^-17 |
| 2 yd | 1.933 × 10^-16 |
| 3 yd | 2.9 × 10^-16 |
| 4 yd | 3.866 × 10^-16 |
| 5 yd | 4.833 × 10^-16 |
| 10 yd | 9.665 × 10^-16 |
| 15 yd | 1.45 × 10^-15 |
| 20 yd | 1.933 × 10^-15 |
| 25 yd | 2.416 × 10^-15 |
| 30 yd | 2.9 × 10^-15 |
| 40 yd | 3.866 × 10^-15 |
| 50 yd | 4.833 × 10^-15 |
| 75 yd | 7.249 × 10^-15 |
| 100 yd | 9.665 × 10^-15 |
| 250 yd | 2.416 × 10^-14 |
| 500 yd | 4.833 × 10^-14 |
| 1,000 yd | 9.665 × 10^-14 |

## How the conversion works

The relationship is ly = yd × 9.665215626 × 10^-17. Both units measure length, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

## Common questions

### How many light-years are in one yard?

One yard equals 9.665 × 10^-17 light-years. ly = yd × 9.665215626 × 10^-17.

### How do you convert yards to light-years?

Use ly = yd × 9.665215626 × 10^-17. So 10 yd is 9.665 × 10^-16 ly.

### How many yards are in one light-year?

One light-year equals 1.0346381 × 10^16 yards, which is the reverse of the conversion above.

## Related pages

- [Light-years to Yards](https://atoneplace.net/convert/light-years-to-yards/)
- [Yards to Meters](https://atoneplace.net/convert/yards-to-meters/)
- [Yards to Kilometers](https://atoneplace.net/convert/yards-to-km/)
- [Yards to Centimeters](https://atoneplace.net/convert/yards-to-cm/)
- [Yards to Millimeters](https://atoneplace.net/convert/yards-to-mm/)
- [Yards to Miles](https://atoneplace.net/convert/yards-to-miles/)
- [Yards to Feet](https://atoneplace.net/convert/yards-to-feet/)
- [Yards to Inches](https://atoneplace.net/convert/yards-to-inches/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)