Mired Shift Calculator
Enter source Kelvin and either target Kelvin or a signed gel shift.
M = 1,000,000 / K; ΔM = Mtarget − Msource; Kout = 1,000,000 / (Msource + ΔM).
Positive shift lowers Kelvin (warmer); negative shift raises Kelvin (cooler).
This estimate does not correct green/magenta tint and may not compensate low-CRI or discontinuous spectra. No filter catalogue is included.
Source reference: Rosco — Filter Facts (PDF)
A QUICK WALKTHROUGH
How to use this tool
- Source temperature (K)
- Target temperature (K)
- Calculate
Formula
M = 1,000,000 / K; ΔM = Mtarget − Msource; Kout = 1,000,000 / (Msource + ΔM). Positive shift lowers Kelvin (warmer); negative shift raises Kelvin (cooler).
Limits
This estimate does not correct green/magenta tint and may not compensate low-CRI or discontinuous spectra. No filter catalogue is included.
GOOD TO KNOW
Common questions
Are inputs uploaded?
No. All calculations run locally in your browser.