Donut Chart Maker — Ring Composition Graph with Center Metric
A donut chart is an annular ring chart that removes the center vertex of a pie chart so viewers judge proportions by arc length ($s_i = r \theta_i$) while reading the aggregate total in the center.
Tip: Paste Excel or Google Sheets rows (Ctrl+V / ⌘V) directly into any cell.
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Annular sector arc length: L_i = R_mid * 2 * pi * (x_i / sum(X)). Center KPI readout: Total = sum_{i=1..n}(x_i).
Chart Design & Use-Case Tips
- 01Annular sector arc length: L_i = R_mid * 2 * pi * (x_i / sum(X)). Center KPI readout: Total = sum_{i=1..n}(x_i).
- 02Donut charts outperform traditional pie charts in dashboard layouts because the hollow center surfaces the aggregate sum without taking extra screen space.
- 03Order segments clockwise starting from the 12 o'clock vertical axis for intuitive visual scanning.
- 04Switch between the 4 industrial palettes to match your presentation or financial memo aesthetic.
Frequently Asked Questions
Why are donut charts often preferred over pie charts in UI design?+
Removing the converging center angles forces the eye to compare outer and inner arc lengths rather than acute center angles, and frees the middle for a summary KPI.
What happens when I hover over a ring segment?+
Hovering highlights the segment and displays its exact value, percentage share of the total, and category label in the precision readout.
Can I export the donut chart with its center total intact?+
Yes, both the 300-DPI PNG and Vector SVG exports preserve the annular geometry, center aggregate label, and legend.