Scientific Calculator Online — Free Trig, Log, Exponent
Trig in degrees, radians or gradians, hyperbolic and inverse functions, bitwise ops in HEX/OCT/BIN, and memory keys. 100-key scientific calculator.
100 keys · keyboard supported · 0 in history · M = 0
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Degrees or radians changes every trig answer
You're solving a homework problem: find sin(90). Your textbook says the answer is 1. You enter it and get 0.894 instead. This is not a calculator bug. Both answers are correct — they are answers to different questions. sin(90°) = 1 in degrees. sin(90 radians) ≈ 0.894. Most textbooks use degrees; most code libraries use radians. Silent mistakes here yield plausible wrong answers, and you will never know why your physics model is off.
This calculator defaults to DEG (see the mode button at the top of the display). If your source material uses radians — common in calculus, physics, and graphics programming — hit RAD and every trig function instantly respects the new unit. The display always shows which mode is active. GRAD (gradian) mode is there for civil engineering, where angles measure to 400 gradians per circle instead of 360 degrees.
Complex numbers are not supported yet
The i button is disabled with a tooltip reading "Complex numbers — coming soon". Expressions like 3 + 4i or complex eigenvalues will not compute. This is a real-number calculator only.
Inverse and hyperbolic trig are mode toggles, not separate buttons
Want asin()? Press INV, then press sin. Want sinh()? Press HYP, then press sin. Press both and you get asinh(). This design saves button space — the entire UI fits 100 keys.
Bitwise operations only work in programmer modes
The bitwise buttons (AND, OR, XOR, NOT, SHL, SHR) light up only when you switch to HEX, OCT, or BIN mode. Digit input also constrains itself: BIN mode only accepts 0 and 1; OCT only accepts 0–7. This prevents invalid expressions before you press equals.
For datasets rather than single expressions, see the Statistics Calculator or the Fraction Calculator.
How to use the Scientific Calculator
Takes about a minute. No signup, no download, your data stays in your browser.
- 1Open the tool. Scroll up to the Scientific Calculator above — it loads instantly in your browser, no install needed.
- 2Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
- 3Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.
Frequently asked questions
Common questions about the Scientific Calculator.
Why does sin(90) give a different answer than I expected?
It depends on your angle mode. In DEG (degrees), sin(90) = 1. In RAD (radians), sin(90) is approximately 0.894. The calculator defaults to DEG. Check the mode indicator at the top of the display to switch between DEG, RAD and GRAD.
Can I compute with complex numbers like 3+4i?
Not yet. The i button is disabled and shows a coming-soon tooltip; complex numbers are still in development. For now the calculator works with real numbers only, so complex roots and eigenvalues will not compute.
What do the INV and HYP buttons do?
INV swaps trig functions to their inverses, so sin becomes asin. HYP swaps them to hyperbolic versions, so sin becomes sinh. You can press both together to get inverse-hyperbolic functions such as asinh, which keeps the keypad compact.
How do I save a number and use it later?
Use the memory buttons. MS stores the current result, MR recalls it, MC clears it, M+ adds the current result to memory, and M- subtracts it. The display shows an M indicator whenever memory holds a non-zero value.
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