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Evaluate math expressions with functions safely. Use for quick calc; for scientific history use scientific-calculator. Input: expression text. Returns numeric result. 100% client-side.
Math Evaluator is loading — interactive editor will appear here. Use examples below to try instantly once loaded.
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Evaluate mathematical expressions with support for basic operators (+, -, *, /, ^, %), functions (sqrt, abs, sin, cos, tan, log, ln, floor, ceil, round), constants (pi, e), and factorial. Includes a history of previous calculations and quick-access example expressions.
Performing quick math calculations with functions and constants is cumbersome in standard calculators; this tool provides a developer-friendly interface that supports programming-style math expressions with immediate results and history.
This tool is part of the DevStackIO platform — a collection of free online developer tools from DevStackIO. Browse more free developer resources on DevStackIO.
Developers, students, engineers, and anyone who needs to quickly evaluate mathematical expressions with functions and constants without opening a full calculator application.
Type a mathematical expression into the input field (e.g., 2 * (3 + 4) / 7)
Press Enter or click the Evaluate button to compute the result
The result is displayed below the input with full precision
Click any example expression to load and evaluate it instantly
Click any history entry to reload that expression for re-evaluation
Use the function reference panel to see all supported operations
2 * (3 + 4) / 7 → 2sqrt(144) + 3^2 → 21sin(pi / 2) + cos(0) → 25! → 120abs(-42) * log(100) → 84What order of operations does the evaluator follow?
Standard mathematical order: parentheses first, then exponents, then multiplication/division, then addition/subtraction.
Can I use variables?
No, this tool evaluates pure mathematical expressions only. Use a programming environment for variable-based calculations.
Why does sin(90) not give 1?
Trigonometric functions use radians. Use sin(pi/2) for the sine of 90 degrees.
What happens with division by zero?
The evaluator will return an error message indicating the expression is invalid.
Authoritative specifications, standards, and in-depth reading for Math Evaluator.
Loading math library...
+Addition-Subtraction*Multiplication/Division^Power%Modulosqrt(x)Square rootabs(x)Absolute valuesin(x)Sinecos(x)Cosinetan(x)Tangentlog(x)Log base 10ln(x)Natural logpiPi constanteEuler's numbern!FactorialAll calculations are done client-side. Your data never leaves your browser.
Calculate percentages, increase, and tips. Use for quick percent math; for change between values use percentage-change-calculator. Input: numbers. Returns percent result. 100% client-side.
Encode and decode geohashes. Use when sharing locations; for timezones use world-clock. Input: lat/lng or geohash. Returns geohash or coords. 100% client-side, files never leave browser.
Show current time across timezones. Use when scheduling; for timestamps use timestamp-converter. Input: timezone selection. Returns local times. 100% client-side, files never leave browser.
Stopwatch and timer with laps in browser. Use when timing tasks; for date spans use date-calculator. Input: button controls. Returns elapsed time. 100% client-side.
Estimate arrival time and duration from speed and distance. Use when planning transfers; for date math use date-calculator. Input: numbers. Returns ETA and duration. 100% client-side.
Compute mean, median and stddev. Use for datasets; for single expressions use scientific-calculator. Input: numbers ≤10MB. Returns stats. 100% client-side, files never leave browser.
Projects lump-sum growth from principal, rate, years and compounding frequency. Use when forecasting a one-time deposit; differs from sip-calculator by single deposit vs monthly contributions. Returns maturity value, interest and schedule. 100% client-side.
Projects SIP wealth from monthly amount, expected return, years and timing. Use when planning recurring fund contributions; differs from compound-interest-calculator by monthly deposits vs lump sum. Returns maturity value, invested total and chart. 100% client-side.