Scientific Calculator
Use an online scientific calculator for arithmetic and scientific functions. Check angle settings and input order when reviewing results.
Enter a calculation
Use the number and operation keys to build an expression, then select =. C clears the display and DEL removes the most recent character. Parentheses can make the intended order of operations explicit. Start with a short expression whose answer you can check.
Try the available functions
The keyboard includes arithmetic, powers, square roots, logarithms, trigonometric functions, factorial, and memory controls. Use the keys actually shown here. A guide to a physical scientific calculator may describe modes or functions this page does not provide.
Check the expression before continuing
For example, 2+3*4 and (2+3)*4 describe different calculations. The first gives 14 under the usual order of operations; the second gives 20. If you receive Error, clear the entry and rebuild it one operation at a time.
Verify important results
Check angle conventions before using trigonometric output. A browser calculation can also display rounded values or floating-point differences. Retain sufficient precision in intermediate work and compare a known example with an independent method before using the result in an assignment or project. This page does not supply a worked explanation of every answer.