Millicandela to Lumens Calculator
Find the total luminous flux in lumens produced by a directional light source like an LED.
Φ_v(lm) = [I_v(mcd) / 1000] × 2π × (1 - cos(½θ))
15000 mcd with 30° beam angle ≈ 1.28 Lumens
How do I convert millicandela to lumens?
To convert millicandela (mcd) to lumens (lm), first divide the mcd by 1,000 to get candela. Then, multiply by the solid angle (determined by the beam apex angle). Formula: Lumens = (mcd / 1000) × 2π × (1 - cos(0.5 × angle)).
What is the standard beam angle for a 5mm LED?
Standard through-hole 5mm LEDs often have beam angles ranging from 15° (very tight) to 60° (wide). This angle is critical for converting the mcd rating to total lumens.
Does higher mcd mean more lumens?
Not necessarily. A high mcd rating might just mean the light is focused into a very narrow beam. A low mcd light with a very wide beam could actually produce more total lumens.
🔗 Related Calculators
📐 Formula
Φ_v(lm) = [I_v(mcd) / 1000] × 2π × (1 - cos(½θ))
📝 Example Calculation
15000 mcd with 30° beam angle ≈ 1.28 Lumens
❓ Frequently Asked Questions
How do I convert millicandela to lumens?▼
To convert millicandela (mcd) to lumens (lm), first divide the mcd by 1,000 to get candela. Then, multiply by the solid angle (determined by the beam apex angle). Formula: Lumens = (mcd / 1000) × 2π × (1 - cos(0.5 × angle)).
What is the standard beam angle for a 5mm LED?▼
Standard through-hole 5mm LEDs often have beam angles ranging from 15° (very tight) to 60° (wide). This angle is critical for converting the mcd rating to total lumens.
Does higher mcd mean more lumens?▼
Not necessarily. A high mcd rating might just mean the light is focused into a very narrow beam. A low mcd light with a very wide beam could actually produce more total lumens.