Math
Scientific Calculator
Keyboard-first scientific calculator with DEG/RAD trig, 2nd functions, memory, history, and display modes.
Free to use — no sign-up or login.
Keyboard: digits and operators type in the expression field · Enter or = evaluate · Backspace delete · Esc/Delete clear · p inserts π
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This free Scientific Calculator covers Keyboard-first scientific calculator with DEG/RAD trig, 2nd functions, memory, history, and display modes.
Enter the Scientific Calculator fields, then read the output. Math calculators on this site keep the formula visible beside the form, with no account required.
Using the Scientific Calculator
Keyboard-first scientific calculator with DEG/RAD trig, 2nd functions, memory, history, and display modes. Fill the labeled fields on the Scientific Calculator and read the result. The formula stays in How it works rather than being repeated here.
FAQ
Why is sin(90) wrong in RAD mode?
In radians, 90 means 90 rad (≈14.32π), not a right angle. Use DEG mode for degree inputs, or convert first: 90° = π/2 rad ≈ 1.5708.
What does Ans do?
Ans recalls the last successful Equals result so you can chain calculations without retyping (for example Ans×2).