Scientific Calculator

You're in radian mode. Degrees vs radians is the single most common scientific calculator mistake: sin(30°) = 0.5, but sin(30 radians) = −0.988. The DEG/RAD toggle sits at the top left — DEG for geometry and most homework, RAD for calculus and physics formulas that expect radian inputs. Check it before blaming the calculator; that's the actual advice printed in TI manuals.

Right to left: 2^(3^2) = 2^9 = 512, not (2^3)^2 = 64. Exponentiation is right-associative on real scientific calculators and in math convention, and this calculator matches. Use parentheses when you mean the other grouping — that habit prevents most exam errors involving stacked powers.

Yes, and it's faster: the input accepts full expressions with keyboard characters — sqrt(2), pi, ans, 5!, sin(45) — and Enter evaluates. The buttons insert the same syntax, so mixing both works. Click any history line to load it back for editing.

Standard double-precision floating point — about 15–16 significant digits, the same as TI and Casio hardware. Displayed results are rounded to 12 significant figures to hide float noise (so 0.1 + 0.2 shows 0.3). The known limits are inherent to floats: factorials above 170 overflow, and subtracting nearly-equal huge numbers loses precision on every calculator built this way.