UnitConvConvert
Length

Convert light years to meters

1 ly=9.4607e15m

Use the converter below to change any light years value into meters instantly — with formula, conversion table, and real-world examples.

9.4607e15

Conversion formula

Forward
meters = light years × 9.4607e15
Reverse
light years = meters × 1.0570e-16

Example: 10 ly × 9.4607e15 = 9.4607e16 m.

About both units

From

Light Year

ly

A light year is the distance light travels in one Julian year — approximately 9.461 × 10¹⁵ meters, or 63,241 AU. It is used in astronomy to describe distances between stars and galaxies. The nearest star to the Sun, Proxima Centauri, is 4.24 light years away.

Real-world: Proxima Centauri, the nearest star beyond the Sun, is 4.24 ly away. The Milky Way is about 100,000 ly across.
Read full light year reference →
To

Meter

m

The meter is the base SI unit of length. It was first defined in 1793 as one ten-millionth of the distance from the equator to the North Pole through Paris. Today it is defined as the distance light travels in vacuum in 1/299,792,458 of a second — a definition tied directly to the universal speed of light. The meter is the foundation of the metric system used by 95% of the world.

Real-world: A standard door is about 2 metres tall. An Olympic swimming pool is exactly 50 metres long. The Eiffel Tower is 330 metres tall.
Read full meter reference →

Light Year to Meter conversion table

Common light years to meters values for quick reference.

Light Year (ly)Meter (m)
1 ly9.4607e15 m
5 ly4.7304e16 m
10 ly9.4607e16 m
25 ly2.3652e17 m
50 ly4.7304e17 m
100 ly9.4607e17 m
250 ly2.3652e18 m
500 ly4.7304e18 m
1,000 ly9.4607e18 m
5,000 ly4.7304e19 m

Tips & common mistakes

Quick tips

  • The light year is a unit of distance, not time, despite the name.
  • Professional astronomers usually prefer parsecs (1 pc ≈ 3.26 ly) for precision work.
  • Light from the Andromeda galaxy takes 2.5 million years to reach us — we see it as it was 2.5 Myr ago.

Avoid these

  • Confusing light year with light second — light second ≈ 300,000 km.
  • Treating light years as time rather than distance in casual conversation.
  • Using light years for solar-system distances — use astronomical units (AU) instead.

Frequently asked questions

How many meters in a light year?
One light year equals 9.4607e15 meters.
How do I convert light years to meters?
Multiply the light year value by 9.4607e15 to get the equivalent in meters.
What is 100 light years in meters?
100 light years equals 9.4607e17 meters.
Is a light year bigger than a meter?
Yes. 1 light year equals 9.4607e15 meters, so one light year is larger.
How to convert light years to meters without a calculator?
Multiply by 9.4607e15 for a quick estimate; use a calculator for precise results.

Related length conversions

📊 See full comparison matrix →

More from Light Year

ly → km
1 = 9,460,700,000,000 km
ly → cm
1 = 9.4607e17 cm
ly → mm
1 = 9.4607e18 mm
ly → mi
1 = 5,878,606,438,399.75 mi
ly → yd
1 = 1.0346e16 yd
ly → ft
1 = 3.1039e16 ft
ly → in
1 = 3.7247e17 in
ly → nmi
1 = 5,108,369,330,453.56 nmi

More to Meter

km → m
1 = 1,000 m
cm → m
1 = 0.01 m
mm → m
1 = 0.001 m
mi → m
1 = 1,609.34 m
yd → m
1 = 0.9144 m
ft → m
1 = 0.3048 m
in → m
1 = 0.0254 m
nmi → m
1 = 1,852 m

Conversions in other categories

WeightKilogram → PoundTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourEnergyKilojoule → KilocaloriePressureBar → Pound per Square InchPowerKilowatt → Mechanical Horsepower