Bitmap Font Atlas Planner
Estimate glyph grid dimensions for a fixed-cell font atlas.
Your inputs
Calculation results
Formula & assumptions
Rows = ceiling(glyphs/columns); atlas dimensions use padded cells.
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using Bitmap Font Atlas Planner
Estimate glyph grid dimensions for a fixed-cell font atlas.
- Enter glyph count, columns, cell width, cell height, padding per edge using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Glyph count: 256 glyphs Columns: 16 columns Cell width: 32 pixels Cell height: 48 pixels Padding per edge: 1 pixels Rows: 16 Atlas width · pixels: 544 Atlas height · pixels: 800 Unused glyph cells: 0
Questions & answers
What does Bitmap Font Atlas Planner calculate?
Estimate glyph grid dimensions for a fixed-cell font atlas.
Which units should I enter?
Glyph count uses glyphs. Columns uses columns. Cell width uses pixels. Cell height uses pixels. Padding per edge uses pixels. Convert values to these units before calculating.
Which formula does it use?
Rows = ceiling(glyphs/columns); atlas dimensions use padded cells.
What does the included example show?
Glyph count: 256 glyphs; Columns: 16 columns; Cell width: 32 pixels; Cell height: 48 pixels; Padding per edge: 1 pixels. Result: Rows = 16; Atlas width · pixels = 544; Atlas height · pixels = 800; Unused glyph cells = 0.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
Related tools
A useful next step for your task.
Developer & DataMesh Memory EstimatorEstimate raw vertex and index buffer storage for a mesh.
Developer & DataRendering Frame Time BudgetPlan available milliseconds per frame and remaining budget after a measured stage.
Everyday CalculatorsScientific CalculatorCalculate powers, roots, trigonometry, logarithms and factorials with degree/radian modes, memory, unrounded answer reuse and temporary history.
Developer & DataJSON Formatter & ValidatorHighly recommendedInstantly format, minify, and validate your JSON code. Features include live preview, syntax highlighting, tree viewer, and structure stats.
Help improve this tool
Report a problem or suggest an improvement
Describe the issue without pasting private tool input. Feedback goes to our admin inbox.