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TextArray1.41.0
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Inline math evaluator

Find arithmetic expressions ending in "=" in your text and fill in the answer.

Input
Output
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Inline math evaluator
Paste any text that contains loose arithmetic and this tool finds every expression that ends with an equals sign and fills in the answer, right where it is. Type "2+5=" and it becomes "2+5=7". Type "10*15=" and it becomes "10*15=150". It is built for notes, meeting minutes, spreadsheet-pasted totals, homework drafts and any plain-text place where you jot down a quick sum and would rather not switch to a calculator app.
The evaluator supports addition, subtraction, multiplication and division, and it respects normal operator precedence, so "2+3*4=" correctly becomes "2+3*4=14" rather than 20. Wrap part of an expression in parentheses to override that order, including nested parentheses like "((1+2)*(3+4))=". Numbers can be integers or decimals, and results are formatted the way a person would write them — no trailing ".0", and floating-point noise from divisions like 0.1+0.2 is rounded away.
Two safety behaviours keep it predictable. If an expression already has an answer — say your text reads "2+5=7" — the tool leaves it alone instead of appending a second one. If something only looks like an expression but is not, such as unbalanced parentheses, two operators in a row, or division by zero, that text is left untouched rather than guessed at; comparisons like "x==y" or "n>=5" are recognized as not being equations either. A summary line under the output reports how many expressions were found and how many were solved.
Everything runs locally in your browser using a small hand-written parser — there is no eval() or Function() involved, and no text is ever sent anywhere. That makes it safe to run over drafts containing private numbers: budgets, invoices, inventory counts or personal calculations. Paste, review the filled-in results, then copy the output or send it on to another tool.
FAQ
Which operators are supported?
Addition (+), subtraction (-), multiplication (*), division (/) and parentheses for grouping, including nested parentheses. Standard operator precedence applies, so multiplication and division are evaluated before addition and subtraction unless parentheses say otherwise.
What happens if an expression already has an answer?
It is left as-is. If the tool detects a number right after the "=" — for example "2+5=7" — it treats that expression as already solved and does not append a second result.
What if an expression is invalid, like unbalanced parentheses or division by zero?
It is left completely untouched. The tool only appends a result when it can parse the full expression safely; anything malformed passes through unchanged, and the summary count reflects only the expressions that were actually solved.
Does it use eval() or JavaScript's Function() to compute results?
No. Expressions are parsed and evaluated with a small hand-written parser that only understands numbers, +, -, *, / and parentheses. There is no code execution of any kind, which keeps the tool safe to run on arbitrary text.
Is my text uploaded anywhere?
No. The inline math evaluator runs entirely in your browser and your text never leaves your device.