Studio Lighting Ratio Calculator
Calculate lighting ratios and power settings for professional portrait and product photography
About this calculator
The Studio Lighting Ratio Calculator helps photographers determine precise lighting ratios and power settings for professional portrait and product photography. By calculating the relationship between key light, fill light, and background lighting, this tool ensures consistent, well-balanced illumination across your shoots. Perfect for studio photographers who need to maintain specific lighting moods, create dramatic shadows, or achieve even product lighting for commercial work.
How to use
Input your key light power setting, then enter your fill light and background light values. The calculator will instantly display the lighting ratio between your key and fill lights, helping you achieve the desired contrast and mood for your subject.
Frequently asked questions
What's the ideal lighting ratio for portraits?
For natural portraits, use 2:1 or 3:1 ratios. For dramatic effect, try 4:1 or higher ratios to create stronger shadows.
How do I measure light output for accurate ratios?
Use a light meter to measure incident light at your subject's position, or check your camera's histogram for consistent exposure readings.
Can this calculator work with different light types?
Yes, the calculator works with any light source including strobes, continuous LED panels, and tungsten lights regardless of brand or wattage.