Calculators

Scientific Calculator

Trigonometry, logs, powers, roots and factorials in degrees or radians. Type the whole expression or use the keypad.

Degrees

How it works

Expressions follow the standard order of operations: brackets first, then postfix operations such as factorial, then powers, then signs, then multiplication and division, and finally addition and subtraction, each working left to right. Powers are the exception and group from the right, so 2^3^2 is 2^9 = 512. A minus sign in front applies after the power, so −2² is −4, as written on paper.

( ) → ! % ² → ^ → −x → × ÷ mod → + −
2π, 3(4 + 1)
A number next to a bracket or constant means multiply
x%
x ÷ 100, so 200 × 15% = 30
log, ln
Base-10 and natural logarithms; log2 for base 2
Ans
The result of the last calculation

Worked example

The height of a ramp 12 m long at a 20° slope: 12 × sin(20), in degree mode.

  1. 1Type 12 × sin(20), or press 1, 2, ×, sin, 2, 0, )
  2. 2sin(20°) = 0.342020143
  3. 312 × 0.342020143 = 4.10424172
  4. 4Press = to keep it; Ans now holds 4.10424172

The ramp rises about 4.10 m.

Frequently asked questions

Should I use degrees or radians?

Degrees for everyday angles, such as slopes, triangles and navigation. Radians for calculus, physics formulas and anything involving π, since sin(π/2) = 1 only in radians. The Deg / Rad key switches between them; the mode is shown under the result.

Why does 200 + 10% give 200.1 and not 220?

Here % simply means divide by 100, so 10% is 0.1. Some pocket calculators treat + 10% as 'add ten percent'. To add 10% here, type 200 × 110% or 200 × 1.1.

How do I do inverse trig functions?

Press 2nd, and sin, cos and tan become sin⁻¹, cos⁻¹ and tan⁻¹, while ln and log become eˣ and 10ˣ. You can also type asin(0.5), acos or atan directly. In degree mode asin(0.5) gives 30.

Can I type with my keyboard?

Yes. Type into the display using * or × for multiply, / or ÷ for divide, and ^ for powers. Press Enter for the answer and Esc to clear. Function names such as sqrt, cbrt, abs and exp work too.

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