Scientific Calculator — free online tool
Evaluate trigonometry, logarithms, factorials, and powers with a safe expression evaluator—fits homework checks and engineering scratch work.
When to use Scientific Calculator
Homework and engineering scratch work with trig, logs, and powers—no phone app needed.
Cross-check anything that affects money or health with a qualified professional or official source.
What Scientific Calculator does not do
Expression evaluator. Not a graphing CAS, unit-aware physics solver, or spreadsheet.
How to use Scientific Calculator
- Wait for math.js to load on first use of the Scientific Calculator.
- Type an expression using buttons or the keyboard (sin, cos, sqrt, powers).
- Press equals or evaluate to see the numeric result.
- Clear entry between homework problems to avoid carrying old state.
Practical tips
- Wrap expressions in brackets—implicit precedence trips up long formulas.
- Switch between degrees and radians deliberately; trig answers depend on the mode.
- Build complex calculations in steps so you can spot where a value goes wrong.
Example
Evaluate sqrt(2)^2 + sin(pi/2) to sanity-check radians mode.
Related tools on Webtoolshop
- Percentage Calculator — Simple percent modes without trig/logs.
- Unit Converter — Physical units, not expression evaluation.
Limitations
Expression length and function set are limited. Degrees vs radians depend on the mode shown.
Privacy & data
For this calculator-style page, numbers and dates stay in your browser memory until you leave. They are not saved to our servers.
Frequently asked questions about Scientific Calculator
What does the Scientific Calculator not do?
Expression evaluator. Not a graphing CAS, unit-aware physics solver, or spreadsheet.
Give me a concrete example for the Scientific Calculator.
Evaluate sqrt(2)^2 + sin(pi/2) to sanity-check radians mode.
Can I use the Scientific Calculator for official tax, loan, or medical decisions?
No. Results are simplified estimates for learning and quick checks. Confirm figures with a qualified professional, lender, or government source before filing or signing contracts.
Where does my input go when I use the Scientific Calculator?
For this calculator-style page, numbers and dates stay in your browser memory until you leave. They are not saved to our servers.
Scientific Calculator
Expressions evaluated with math.js (loaded from jsDelivr on first use).