What operations are supported?

Addition, subtraction, multiplication, division, percentages, exponents, and parentheses.

Can I use it without a CSV?

Yes — use it as a standalone calculator for quick arithmetic.

No. Everything runs locally in your browser.

Process files up to the browser memory limit.

Yes — add multiple formula columns in sequence.

Apply spreadsheet-style formulas to CSV columns without opening Excel. Fast, private, and secure browser-based tool with no s

Your files never leave your device. Processed locally. 100% private.

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Complete your task perfectly in just three straightforward steps.

Type any arithmetic expression e.g. 15% of 2450, or (1200 * 12) / 100.

Reference column names to apply the formula to every row.

Copy the result or download the output CSV.

Everything you need to know about the Formula Calculator.

Continue working with our suite of free data utilities.

Count total rows, filtered rows, and unique values in a CSV file instantly. Securely process files in your browser memory wit

Calculate percentages, increases, decreases, and ratios directly in your browser. 100% private, secure, and fast local browse

Reconcile bank statements against internal records. Match transactions and highlight discrepancies. The safest way to process