convertimate Flux density (jansky, AB mag)

W m⁻² Hz⁻¹ to janskys

Type a value in W/m²/Hz to get it in Jy instantly.

3.63×10⁻⁷Jy

That's 100× as bright as the faintest galaxies in Hubble’s deep fields, while the faintest star the eye can see is 39,821,684× brighter.

What it means

How bright is that source?

AB magnitudes are defined per unit frequency. Vega-system magnitudes differ by a band-dependent offset; references are rough visual values.

The math

How to convert W/m²/Hz to Jy

To convert W m⁻² Hz⁻¹ to janskys, multiply by 1×10²⁶.

Example: 3.63×10⁻³³ W/m²/Hz × 1×10²⁶ = 3.63×10⁻⁷ Jy.

In the other direction, 1 Jy = 1×10⁻²⁶ W/m²/Hz.

Every unit

That flux density in every unit

Tables

W/m²/Hz to Jy conversion table

W/m²/Hz to Jy conversion table
W/m²/HzJy
3.63×10⁻³⁵ W/m²/Hz3.63×10⁻⁹ Jy
2.29×10⁻³⁴ W/m²/Hz2.29×10⁻⁸ Jy
3.63×10⁻³³ W/m²/Hz3.63×10⁻⁷ Jy
3.63×10⁻³² W/m²/Hz3.63×10⁻⁶ Jy
3.63×10⁻³¹ W/m²/Hz3.63×10⁻⁵ Jy
1×10⁻²⁹ W/m²/Hz0.001 Jy
3.63×10⁻²⁹ W/m²/Hz0.00363 Jy
3.63×10⁻²⁷ W/m²/Hz0.363 Jy
3.63×10⁻²⁵ W/m²/Hz36.3 Jy
3.63×10⁻²³ W/m²/Hz3,630 Jy
3.63×10⁻²¹ W/m²/Hz363,000 Jy
Jy to W/m²/Hz conversion table
Jy to W/m²/Hz conversion table
JyW/m²/Hz
3.63×10⁻⁹ Jy3.63×10⁻³⁵ W/m²/Hz
2.29×10⁻⁸ Jy2.29×10⁻³⁴ W/m²/Hz
3.63×10⁻⁷ Jy3.63×10⁻³³ W/m²/Hz
3.63×10⁻⁶ Jy3.63×10⁻³² W/m²/Hz
3.63×10⁻⁵ Jy3.63×10⁻³¹ W/m²/Hz
0.001 Jy1×10⁻²⁹ W/m²/Hz
0.00363 Jy3.63×10⁻²⁹ W/m²/Hz
0.363 Jy3.63×10⁻²⁷ W/m²/Hz
36.3 Jy3.63×10⁻²⁵ W/m²/Hz
3,630 Jy3.63×10⁻²³ W/m²/Hz
363,000 Jy3.63×10⁻²¹ W/m²/Hz

Quick answers

Quick answers

How many Jy is 1 W/m²/Hz?
1 W/m²/Hz is 1×10²⁶ Jy.
How many Jy is 10 W/m²/Hz?
10 W/m²/Hz is 1×10²⁷ Jy.
How many Jy is 3.63×10⁻³³ W/m²/Hz?
3.63×10⁻³³ W/m²/Hz is 3.63×10⁻⁷ Jy.

The units

About these units

W m⁻² Hz⁻¹ (W/m²/Hz)

SI spectral flux density.

Janskys (Jy)

10⁻²⁶ W m⁻² Hz⁻¹.

Learn more about brightness units

Keep going

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