Scientific Calculator
Evaluate expressions with sin, cos, tan, log, and powers in your browser. Not a CAS.
Calculator
Your data stays private
Expressions are evaluated in this browser. Nothing is uploaded or stored on a server.
About the scientific calculator in this tab
Scientific Calculator evaluates expressions with sin, cos, tan, log, and powers using JavaScript math in this browser. It is a scratch pad, not a CAS, not a graphing calculator, and not IEEE-backed financial rounding. Trig follows JavaScript radian convention unless the panel documents degrees — check the keys before you trust a sine.
Floating point will surprise you (0.1 + 0.2). Extreme powers overflow to Infinity. This is not a substitute for Percentage, Loan, or GPA pages that document a specific formula. Unit Converter is for converting measurements, not for evaluating sin.
Related: Percentage Calculator, Unit Converter, Loan Calculator, GPA Calculator, BMI Calculator. Nothing is uploaded.
The URL is /tools/scientific-calculator. We do not plot graphs and we do not solve for x symbolically. Memory keys, if present, live only in this tab. Close the page to drop the expression. Open Loan or BMI when the formula is documented on those pages.
Homework scratch is welcome. Engineering sign-off is not. Use the dedicated formula pages when the problem is a loan or a GPA, not a sine.
How to evaluate an expression
Enter the expression
Use the keypad or type. Functions follow the panel labels.
Evaluate
Read the result in the display. Watch radians versus degrees for trig.
Clear when done
Clear drops the expression. Closing the tab does the same.
Local math
Nothing is uploaded. Open a dedicated calculator page for loan or BMI formulas.
Related tools
Percentage Calculator
Calculate percentages easily. Find percentage of a number, increase/decrease, percentage difference and more.
Unit Converter
Convert length, mass, temperature, volume, area, speed, and data units in your browser.
Loan Calculator
Estimate a fixed monthly payment, payment count, total paid, and total interest from principal, APR, and years. Zero APR is allowed. This is not a lender quote.
GPA Calculator
Compute a credit-weighted GPA on a 4.0 scale from letter grades or numeric points. Each line is grade, credits. The average updates as you type.
BMI Calculator
Calculate body mass index from metric kilograms and centimeters or imperial pounds and inches. WHO-style adult categories appear with the index. Not medical advice.
Scientific Calculator FAQ
JavaScript math uses radians unless the panel documents degrees. Check the keys before trusting sine. This is not a CAS or graphing calculator.
Binary floating point. Extreme powers become Infinity. Use Loan, GPA, or Percentage pages when you need a documented formula rather than a scratch pad.
No. Evaluation stays in this browser.
No. It is a scratch pad with JavaScript math, not a CAS. Memory keys, if present, live only in this tab. Open Loan, BMI, GPA, or Percentage when the formula is documented on those pages. Unit Converter converts measurements rather than evaluating sine. Close the page to drop the expression. Nothing is uploaded.