Scientific Calculator
See full-featured scientific calculator with trigonometry, logarithms, exponents, and a live history tape.
Last updated: May 11, 2026
Scientific Calculator
A Online Scientific Calculator built for students, engineers, and anyone working with advanced math. It supports standard arithmetic, trigonometric functions (sin, cos, tan and their inverses), logarithms (base-10 and natural), exponents, square roots, factorials, and constants like π and e. The tool features a running history tape so you can review past calculations, and supports both Degrees and Radians for angular measurements. Everything runs 100% locally in your browser for instant, private calculations.
Why This Tool Exists
What makes this useful — and why I built it this way.
Instant Access: No app install required — runs directly in your browser.
Full Scientific Suite: Covers everything from basic math to advanced trig and logs.
History Tracking: Never lose a previous result — scroll through your session history.
Privacy First: No data is transmitted; all math is computed locally.
When You'd Use This
Real situations where this tool saves the day.
Students: Solving homework problems involving trigonometry, logarithms, or exponents.
Engineers: Quick on-the-fly calculations without opening a desktop application.
Finance: Computing compound interest or growth rates using power and log functions.
Science: Converting between degrees and radians for physics or astronomy work.
Using Scientific Calculator
It's straightforward — here's how it works.
Click the number and operator buttons to build your expression.
Use function buttons (sin, cos, log, etc.) for advanced operations.
Toggle between Degrees and Radians for trigonometric calculations.
Press '=' to evaluate and view the result.
Review your calculation history in the side panel.
Questions People Ask
Honest answers about how this works.
Does it support parentheses?
Honestly? Yes. Parentheses are evaluated first, then powers and roots, then multiplication and division, and finally addition and subtraction, so you can group anything the default precedence would get wrong. Nested parentheses work too, and the AC key clears the whole expression when you want to start over.
Can I really switch between Degrees and Radians?
Honestly? Yes. The D/R toggle at the top of the keypad switches every trigonometric function between degree and radian mode, including the inverses, so sin of 90 returns 1 in DEG and sin of π/2 does the same in RAD. The mode you pick stays active until you change it.
How does it handle operator precedence and precision?
Expressions follow standard precedence: parentheses first, then powers and roots, multiplication and division, and finally addition and subtraction, so 2 + 3 × 4 evaluates to 14. Results are trimmed to 12 significant digits and shown without trailing zeroes, which keeps floating-point noise like 0.30000000000000004 from appearing on the display.
Discover More Tools
Hand-picked utilities to speed up your workflow.