Scientific Calculator

How to Use the Scientific Calculator

1. Enter numbers and operators using the on-screen keys or your keyboard.
2. Choose Degrees or Radians under Angle before using sin, cos or tan. The choice also applies to sin⁻¹, cos⁻¹ and tan⁻¹.
3. Use parentheses to control the order of operations. Function keys such as sin( and √( open a bracket, so close it with ).
4. Select = (or press Enter) to evaluate. Select C to clear the display, ⌫ to delete the last character and Ans to reuse your last result.

Scientific Calculator Formula Explained

Expressions follow conventional mathematical precedence: parentheses first, then factorials and powers, then multiplication, division and mod, then addition and subtraction. Trigonometric functions use the angle mode you choose. In Degrees mode, sin, cos and tan convert the angle to radians first (× π ÷ 180), and sin⁻¹, cos⁻¹ and tan⁻¹ return degrees. In Radians mode no conversion is made. Logarithms are base-10 (log) or natural base e (ln). Results are floating-point approximations; extremely large or small intermediate values may hit normal JavaScript number limits. This tool is designed for real-valued calculations rather than symbolic algebra.

The calculator reads the whole expression, applies factorials and powers first, then multiplication, division and mod, then addition and subtraction. The mod key (typed as %) is the remainder operator, so 10 mod 3 is 1, not a percentage. The ^ key is right-associative, so 2^3^2 is 2^(3^2) = 512, and a minus sign before a power applies after it, so -2^2 is −4. The factorial n! works for whole numbers from 0 to 170. Results are rounded to 10 decimal places, so sin(180°) shows 0 instead of a tiny rounding residue. Dividing by zero, the log of a non-positive number or tan(90°) shows an error.

Scientific Calculator Example Calculation

In Degrees mode, sin(30) returns 0.5 and cos(60) returns 0.5. Switch to Radians and sin(30) returns −0.9880316241, while sin(π/2) returns 1. Parentheses control order when mixing powers, roots and trigonometry.

Worked example: in Degrees mode, press sin, 3, 0, ), then = to get 0.5. Then press sin⁻¹, 0, ., 5, ), = to get 30. In either mode (2+3)*4 gives 20, 2^10 gives 1024, log(100) gives 2, √(81) gives 9, 5! gives 120 and 10 mod 3 gives 1. To use Ans, calculate 6*7 to get 42, then enter Ans/2 and press = to get 21.

When to use this tool

Use this for STEM homework, lab calculations and engineering checks when a four-function calculator is not enough and you need a quick browser tool. Once you have opened the site, it also works without a connection; see how to use Vora Calculator offline.

Key Features & Benefits of This Scientific Calculator

• Scientific keys on screen — sin, cos, tan and their inverses, log (base 10), ln, √, ∛, x², x³, xʸ, eˣ, 10ˣ, 1/x, n!, π, e and parentheses.
• Whole expressions in one go — type a multi-step expression such as (2+3)*4 and press = once.
• Standard order of operations — parentheses, then factorials and powers, then multiplication and division, then addition and subtraction; ^ is right-associative, so 2^3^2 is 512.
• Degrees and radians — switch the angle mode, so sin(30) is 0.5 in Degrees and −0.9880316241 in Radians.
• Ans and keyboard input — type digits, operators and function names on a keyboard, press Enter to evaluate and use Ans to reuse your last result.
• Instant, free and private — runs entirely in your browser, no sign-up, nothing stored.

Scientific Calculator — FAQs

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