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This tool applies a standard formula from the relevant domain. The computation is deterministic — given the same inputs, the result is always identical. The formula accounts for the primary variables that determine the output.
MI = ΔE under illuminant 2 − ΔE under illuminant 1The calculation requires: ΔE Illuminant 1 (D65), ΔE Illuminant 2 (A). Each parameter contributes to the final result according to the formula above. Accuracy depends on the precision of your input measurements.
Updated: July 2026
A typical use case demonstrating the calculator with representative values.
→ Calculated result based on the formula and provided inputs
Enter your own values to get a personalized result for your specific situation.
→ Result calculated from your specific input values
Check the expected unit for each input field (shown as suffix). Converting between imperial and metric units before entering values prevents calculation errors.
This calculator uses the formula shown. Real-world results may vary due to factors not captured by the model. Use the result as an estimate and verify with domain-specific standards.
Calculate metamerism index from color differences under two illuminants. Free metamerism index calculator for metamerism, index, and more. It applies the calculation formula (MI = ΔE under illuminant 2 − ΔE under illuminant 1). For example: δe 1.2 (d65) vs 2.8 (a) — A typical use case demonstrating the calculator with representative values.