Luminous Intensity / kcd → lm/sr
Convert Kilocandelas to Lumens per steradian
Convert luminous intensity in candela and SI multiples. Convert Kilocandelas (kcd) to Lumens per steradian (lm/sr). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Lumens per steradian to Kilocandelas →
How to convert kilocandelas to lumens per steradian
A candela equals one lumen per steradian. Total lumens require a known angular distribution; watts require spectral luminous efficacy. Obsolete candle standards are deliberately excluded.
Use x for the value in kcd, b for the intermediate value in cd, and y for the result in lm/sr.
lm/sr = kcd × 1000
Worked examples
10 kcd ≈ 10000 lm/sr
Step 1: (10 × 1000) ≈ 10000 cd.
Step 2: 10000 ÷ 1 ≈ 10000 lm/sr.20 kcd ≈ 20000 lm/sr
Step 1: (20 × 1000) ≈ 20000 cd.
Step 2: 20000 ÷ 1 ≈ 20000 lm/sr.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Kilocandelas
Kilocandelas (kcd) measures luminous intensity under the conventions above. The base value in cd is (x × 1000), where x is the numerical value in kcd. Factors shown here are rounded for display; calculations use the stored factor.
About Lumens per steradian
Lumens per steradian (lm/sr) measures luminous intensity under the conventions above. The base value in cd is (x × 1), where x is the numerical value in lm/sr. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Kilocandelas to lumens per steradian reference table
| Kilocandelas (kcd) | Lumens per steradian (lm/sr) |
|---|---|
| 1 | 1000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 1000 | 1000000 |
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