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Create pie charts from CSV or JSON data with customizable colors
Create pie charts instantly with our free online pie chart generator. This tool helps data analysts and presenters visualize proportional data with customizable pie charts. Simply enter your data and labels to generate professional pie charts in real-time.
Pie chart generator creates circular diagrams divided into slices representing proportions of a whole. Each slice angle corresponds to its percentage of the total. While popular, pie charts are often misused - they work best for simple part-to-whole comparisons with few categories.
Input your data as category-value pairs. The generator calculates percentages and renders slices with angles proportional to values (360° × percentage). Customize colors, labels, legend position, and exploded slices. Export as PNG, SVG, or embed code.
Pie charts map values to angles: slice_angle = (value / total) × 360°. Human perception of angles is poor - we estimate area better. Slices should be labeled directly or with a legend. Sort slices by size (largest first, clockwise from 12 o'clock) for easier reading.
Show how total budget is distributed across departments.
Marketing: 30%, Engineering: 45%, Sales: 25%Visualize competitive landscape with company percentages.
Display respondent breakdown by age, location, etc.
Show what makes up a total (time spent, ingredients, etc.).
const ctx = document.getElementById('chart').getContext('2d');
new Chart(ctx, {
type: 'pie',
data: {
labels: ['Engineering', 'Marketing', 'Sales', 'Support'],
datasets: [{
data: [45, 25, 20, 10],
backgroundColor: [
'#4BC0C0', '#FF6384', '#36A2EB', '#FFCE56'
]
}]
},
options: {
plugins: {
legend: { position: 'right' },
tooltip: {
callbacks: {
label: (ctx) => `${ctx.label}: ${ctx.parsed}%`
}
}
}
}
});Pie charts work best with 3-5 slices. Use distinct colors and consider direct labels for clarity.
Use pie charts only for simple part-to-whole relationships with 2-5 categories where approximate proportions are sufficient. For precise comparisons or many categories, use bar charts.
Avoid pie charts when: comparing values between different pies, showing more than 5-6 categories, displaying changes over time, or when precision matters (bar charts are more accurate). Pie charts only show proportions of ONE whole.