A calculator designed for everyday speed
General mode
Arithmetic, percentages, parentheses, memory, and an editable expression display.
Scientific mode
Trigonometry, logarithms, roots, powers, constants, factorials, and degree/radian control.
Private history controls
History is session-only unless you enable “Save history on this device.” Opt-in storage uses one calculator-only key and is capped at 50 entries. Turning saving off removes the stored copy but keeps the current session; Clear history removes both.
Results are calculated locally from the expression entered. Verify critical calculations independently.
Use this result
Share the current inputs or ask ChatGPT to explain the calculation in context.
More options
What does this calculator estimate?
General and scientific calculator: do everyday math plus trig, powers, logs, and functions in one clean keypad. Free, private, runs locally, no signup.
Why does the order of operations change my answer?
Expressions evaluate by precedence: powers before multiplication and division, which precede addition and subtraction, with parentheses overriding everything. 2 + 3 x 4 is 14, not 20. Ambiguity usually hides in implied multiplication or chained division such as 8 / 2(2+2); adding explicit parentheses resolves it and matches what a grader or colleague expects the expression to mean.
What are the common trig-mode mistakes?
Degrees and radians produce entirely different values from the same input, and most surprising results trace to the wrong mode being active. 90 degrees is 1 in sine under degrees and undefined-ish behavior under radians, where 1 radian differs. Before comparing answers with a textbook, confirm which unit the problem uses and that this calculator's mode matches.
How this calculator works
Formula
General mode handles everyday arithmetic. Scientific mode adds trigonometry, logarithms, powers, constants, roots, factorial, memory, and DEG/RAD angle handling.
Worked example
In General mode, 1 + 2 = 3. In Scientific DEG mode, sin(90) = 1.
Assumptions to verify
- Inputs are evaluated from the expression shown on screen.
- Degree/radian mode affects trig functions.
- Important financial, engineering, or scientific calculations should be independently checked.
Frequently asked questions
When should I use Scientific mode?
Use Scientific mode for trig, logs, powers, roots, constants, factorials, memory, or DEG/RAD calculations. Use General mode for simple arithmetic.
Why does angle mode matter?
Trigonometric functions use the selected DEG or RAD mode, so sin(90) equals 1 in DEG mode but not in RAD mode.
Are results sent to a server?
No. The calculation runs in your browser.
Cite this tool
BoringToolsKit. “General and Scientific Calculator.” boringtoolskit.com/general-scientific-calculator/ (reviewed July 2026). Free to reference in articles, syllabi, and answer posts with a link.
Privacy: Inputs and results stay in this browser. Any future sponsored recommendation or advertisement will be clearly labeled and kept separate from the calculation.