Scientific calculator online

The scientific calculator adds the functions you need in algebra, trigonometry, physics and chemistry class to the basic calculator:

Key	Meaning	Example
sin, cos, tan	Trig functions	sin(30) = 0.5 in DEG
sin⁻¹, cos⁻¹, tan⁻¹	Inverse trig	sin⁻¹(0.5) = 30 in DEG
log	Base-10 logarithm	log(1000) = 3
ln	Natural logarithm	ln(e) = 1
x², xʸ	Powers	2^10 = 1,024
√, ∛	Square and cube root	√(144) = 12
n!	Factorial	5! = 120
EXP	Scientific notation	3e8 = 300,000,000
Ans	Previous answer	Ans × 2

You can also type function names directly, including sqrt, cbrt, abs, exp and the hyperbolic functions sinh, cosh and tanh.

Trig functions depend on the angle unit. Use DEG for geometry and most homework problems where angles are written with a degree sign. Use RAD in calculus, physics formulas with angular frequency, and anywhere angles are given as multiples of π.

The same input gives very different answers:

• sin(30) in DEG = 0.5
• sin(30) in RAD = −0.988

If an answer looks wrong, check the angle mode first. The selected mode is highlighted above the display, and it also applies to inverse functions: sin⁻¹(1) returns 90 in DEG and 1.5708 (π/2) in RAD. Tangent is undefined at 90° (and odd multiples of it), so the calculator shows an error there instead of a huge number.

A ramp is 12 feet long and rises at an angle of 4.8°. How high does it reach?

1. Set the mode to DEG.
2. Type 12 × sin(4.8) and press Enter.
3. The result is about 1.004 feet, roughly 12 inches.

To go the other way, find the angle from a 1-foot rise over a 12-foot run: tan⁻¹(1/12) ≈ 4.76°. For full triangle solving (all sides, angles and area at once) use the triangle calculator.

Results are calculated with standard double-precision floating point and shown with up to 12 significant digits. Very large or very small values switch to scientific notation, written like 6.022e23 (6.022 × 10²³).

Floating-point math can leave tiny rounding traces, such as 0.1 + 0.2 = 0.30000000000000004 in many programming languages. The display rounds these away, so you see 0.3.

Everything is computed locally in your browser; nothing is uploaded. Your history and the Ans value reset when you reload the page. For plotting functions, try the graphing calculator, and for exact factorials of large numbers use the factorial calculator.

• Algebra and precalculus: evaluate powers, roots and logarithms, check answers to exponential equations such as 2^x = 50 (x = log(50) / log(2) ≈ 5.644).
• Trigonometry: find missing sides and angles in right triangles, convert between degree and radian answers.
• Chemistry: work with scientific notation, for example moles × 6.022e23 to count particles, or pH = −log(1.8e-5) ≈ 4.74.
• Physics: plug values into formulas such as v = √(2 × 9.81 × 20) ≈ 19.81 m/s for an object dropped from 20 m.
• Finance: compound growth such as 10000 × 1.07^30 ≈ 76,122.55.

Use parentheses generously. Writing log(50) / log(2) instead of log 50 / log 2 avoids surprises about what the function applies to.