A scientific calculator you can type into — full expressions, degrees or radians, memory, history and every answer as a decimal, a fraction and in scientific notation.
Expression
Type it or tap the keys — the answer updates as you go. Enter works it out, Escape clears.
Two-value functions take a comma: nCr(52, 5), root(27, 3). Ans reuses your last answer.
DEGM 0
Result
—
As a fraction—
Scientific notation—
Last answer (Ans)0
History
History lives in this tab only — nothing is uploaded and closing the tab clears it.
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How this calculator reads what you type
It reads the whole expression at once rather than one keypress at a time, so ordinary maths order applies: 2 + 3 × 4 is 14, not 20. Brackets, powers, roots and functions nest the way they do on paper, and 2(3 + 4) or 3sin30 multiply without you having to type the ×.
Degrees or radians — pick before you press a trig key
A trigonometric function has to know what unit its angle is in, and the DEG / RAD toggle is the only thing telling it. The difference is not subtle: in degrees sin(30) is exactly 0.5, while in radians the same keystrokes give about −0.988, because 30 radians is nearly five full turns. Inverse functions hand the angle back in whichever mode is selected, so sin⁻¹(0.5) is 30 in degrees and 0.5235987756 — that is π ÷ 6 — in radians. The badge above the result always shows the mode in force.
log, ln and the 2nd key
On this keypad log means base 10 and ln means base e, matching a physical scientific calculator. Press 2nd to reach the inverse of each key: sin becomes sin⁻¹, ln becomes eˣ, log becomes log₂, √ becomes ∛, xʸ becomes x², and ! becomes |x|. Press it again to go back.
Three ways of seeing the same answer
Every result is shown as a decimal, as a fraction where a tidy one exists within a denominator of 100,000, and in scientific notation. That is deliberate: 1 ÷ 3 reads better as 1 / 3, while 0.000000123 reads better as 1.23 × 10⁻⁷.
Most wrong answers on a scientific calculator come from three places, and all three are avoidable. The first is angle mode — if a trig result looks wildly off, check the DEG/RAD badge before checking your arithmetic. The second is bracket placement around a function argument: sin(30) + 5 and sin(30 + 5) are different questions, and the keypad opens the bracket for you so the second only happens if you move it. The third is the minus sign in front of a power: −2^2 is −4, because the power binds tighter than the sign, while (−2)^2 is 4.
A few habits speed things up. Type directly into the box on a laptop — 12*(3+4)^2 then Enter is faster than tapping. Tapping inserts at the cursor rather than at the end, so you can go back and fix one digit in the middle of a long expression. DEL removes a whole function token such as sin( in one press instead of chewing through it letter by letter. And Ans carries your last result into the next line, which keeps multi-step work honest — rounding a number by hand and retyping it is where precision quietly leaks away.
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Frequently asked questions
Does this calculator follow order of operations?
Yes. It parses the whole expression, so multiplication and division happen before addition and subtraction, and powers before both. 2 + 3 × 4 gives 14. Brackets override the order as usual.
What is the difference between DEG and RAD mode?
DEG treats angles as degrees, where a full circle is 360. RAD treats them as radians, where a full circle is 2π and one radian is about 57.3°. Degrees suit geometry and navigation; radians are standard in calculus and physics. sin(30) is 0.5 in degrees but about −0.988 in radians.
Does log mean base 10 or natural log?
On this keypad log is base 10 and ln is base e, which matches physical scientific calculators. Press 2nd on the log key for log₂. Some mathematical writing uses log to mean the natural logarithm, so check the convention of whatever text you are following.
Can I type on my keyboard instead of tapping?
Yes — the display is a real text field. Type something like 12*(3+4)^2 and press Enter to work it out, or Escape to clear. You can also write function names out in full, such as sqrt(2), ln(10) or nCr(52, 5).
What does Ans do?
Ans inserts your most recent answer into the expression, so you can carry full precision into the next step instead of rounding a number by hand and retyping it. The memory keys MC, MR, M+ and M− store a separate running value.
Why did I get an error instead of a number?
The calculator explains what went wrong in plain English rather than showing NaN — for example a square root of a negative number, a logarithm of zero, sin⁻¹ of something outside −1 to 1, a division by zero, or a bracket that was opened and never closed. Fix the flagged part and the result appears again.