FormulaEngineer — A Highly Accurate Excel Formula Engine with support for 430+ Excel functions — explore the complete list NEW3.0.3
Exact Excel results, not guesses In milliseconds No tokens, no API bill Flat licence fee
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See your workbook, recalculated

Upload an .xlsx and FormulaEngineer rebuilds every value from the formulas — no Excel, no COM. First 30 rows of each sheet, up to 1 MB.

No file? Try a sample:
More than formula evaluation
This demo shows formula evaluation only. FormulaEngineer is a complete Excel solution — all without Excel or COM.
Styling Formatting Tables Charts Images Shapes Sparklines 430+ functions
Sample output
Drop an .xlsx here, or click to choose
.xlsx only · 1 MB max
Processed in memory. Files aren't stored.
Sheets
0
Cells read
0
Formulas evaluated
0
Time
0ms
This demo runs on shared hosting. Performance depends on the available server CPU. On dedicated hardware, the same file processes significantly faster.
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Select a formula cell
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scroll sideways for more columns