Plot Roc Curve Excel -

So next time your manager asks, “How good is our model?” – you don’t need to fire up Jupyter. Just open Excel and show them the curve.

If you work in data science, machine learning, or medical diagnostics, you’ve probably heard of the (Receiver Operating Characteristic curve). It’s a powerful tool to evaluate the performance of a binary classification model. But what if you don’t have access to Python, R, or SPSS?

| A (Actual) | B (Predicted Prob) | |------------|--------------------| | 1 | 0.92 | | 0 | 0.31 | | 1 | 0.88 | | 0 | 0.45 | | 1 | 0.67 | | ... | ... |

Good news:

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by predicted probability (highest to lowest). 👉 Select both columns → Data tab → Sort → by Predicted Prob → Descending . Step 2: Choose Threshold Values We will test different classification thresholds (cutoffs). For each threshold, we calculate True Positives, False Positives, etc.

= =G2/(G2+H2) ⚠️ Handle division by zero: if denominator is 0, set value to 0 or N/A. Step 4: Copy Formulas for All Thresholds Drag these formulas down for every threshold value you defined. plot roc curve excel

= =COUNTIFS($A$2:$A$100,0,$B$2:$B$100,"<"&E2)

= =SUM(N2:N_last) AUC ≥ 0.8 is generally considered good; 0.9+ is excellent. Practical Example & Interpretation Let’s say your AUC = 0.87. This means there’s an 87% chance that the model will rank a randomly chosen positive instance higher than a randomly chosen negative one.

Column N: = =L3*M3 (drag down)

= =COUNTIFS($A$2:$A$100,0,$B$2:$B$100,">="&E2)

= =F2/(F2+I2)

Add a new column named Threshold . Start from the highest predicted probability down to the lowest, then add 0. So next time your manager asks, “How good is our model

with your own data or download our free template below (link to template). And if you found this helpful, share it with a colleague who still thinks Excel can’t do machine learning evaluation! Have questions or an Excel trick to add? Drop a comment below!