Convert Watt at 555nm to Candela Steradian
Enter the number of watts at 555nm that you want to convert to candela steradians.
How to Convert Watts at 555nm to Candela Steradians
The watt at 555nm and candela steradian are both units of luminous flux. By definition, 1 watt at 555nm equals exactly 683 candela steradians. This means to convert watts at 555nm to candela steradians, you multiply by 683.
Formula
Step-by-Step Example
Convert 5 W@555nm to candela steradians:
We need to convert watts at 555nm to candela steradians
Since 1 W@555nm = 683 cd·sr, multiply by 683
5 × 683 = 3415
5 W@555nm = 3415 cd·sr
Watt at 555nm to Candela Steradian Conversion Table
Quick reference table for common watt at 555nm to candela steradian conversions. Click any value for detailed calculation.
| Watts at 555nm (W@555nm) | Candela Steradians (cd·sr) |
|---|---|
| 0.1 W@555nm | 68.3 cd·sr |
| 0.5 W@555nm | 341.5 cd·sr |
| 1 W@555nm | 683 cd·sr |
| 2 W@555nm | 1366 cd·sr |
| 5 W@555nm | 3415 cd·sr |
| 10 W@555nm | 6830 cd·sr |
| 25 W@555nm | 17075 cd·sr |
| 50 W@555nm | 34150 cd·sr |
| 100 W@555nm | 68300 cd·sr |
About These Units
Watt at 555nm (W@555nm)
Watts at 555nm represents the peak luminous efficacy of radiation: exactly 683 lumens per watt at 555nm wavelength (green-yellow light where human eye is most sensitive). This fundamental constant links radiometric (watts) to photometric (lumens) measurements.
Candela Steradian (cd·sr)
A candela steradian (cd·sr) is the defining relationship for lumens: 1 lumen = 1 candela × 1 steradian. Shows how luminous flux relates to luminous intensity (candelas) and solid angle (steradians). A sphere has 4π ≈ 12.57 steradians total solid angle.
Frequently Asked Questions
How do I convert watts at 555nm to candela steradians?
To convert watts at 555nm to candela steradians, multiply the value by 683. For example, 10 W@555nm = 6830 cd·sr.
How many candela steradians are in 1 watt at 555nm?
1 watt at 555nm equals 683 candela steradians.
What is the formula for watts at 555nm to candela steradians?
The formula is: cd·sr = W@555nm × 683.