Lumen per Steradian (lm/sr)
Lumen per steradian (lm/sr) equals one candela — luminous flux per unit solid angle in a given direction.
Lumen per steradian expresses directional lamp output and is numerically identical to the candela.
Lumen per Steradian to Candle (International)
Convert lumen per steradian to candle (international) instantly. Type in either field — results update live.
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luminous-intensity Lumen per Steradian Candle (International)
1 lumen per steradian = 1 candle (international)
Unit
Unit
Conversion table
Selected lm/sr values converted to cd using the exact factor from this tool.
| lm/sr | cd |
|---|---|
| 0.01 | 0.01 |
| 0.1 | 0.1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 5 | 5 |
| 10 | 10 |
| 20 | 20 |
| 50 | 50 |
| 100 | 100 |
| 1,000 | 1,000 |
How to convert
Exact conversion factors in both directions, plus a worked example.
1 lm/sr = 1 cd
1 cd = 1 lm/sr
To convert lumen per steradian to candle (international), multiply by 1.
To convert candle (international) to lumen per steradian, multiply by 1.
Example: convert 10 lm/sr to cd
10 × 1 = 10 cd
About these units
Short background on the units used in this conversion.
Candle (International) (cd)
The candle (international) is the historical name for the candela — the SI base unit of luminous intensity. One international candle equals one candela.
International candle remains the reference in photometry texts; modern SI usage prefers candela and lumen per steradian.
Frequently asked questions
How many candle (international)s are in one lumen per steradian?
One lumen per steradian equals 1 candle (international)s. Multiply your lumen per steradians value by 1 to convert to candle (international)s.
What is the conversion formula?
cd = lm/sr × 1The reverse is
lm/sr = cd × 1, using the same exact factors as this converter.Is this Lumen per Steradian to Candle (International) converter private?
Yes. All calculations run locally in your browser. Nothing you type is sent to a server.