OmniTools

Scientific Calculator

Trig, log and ln, roots, powers, π and e with a RAD/DEG switch and your last ten results.

Basis: IEEE 754 double-precision floating point with standard operator precedence·2026-08-28 verified·Editorial policy

Before you rely on this

Calculations use JavaScript double-precision floating point (IEEE 754), so 0.1 + 0.2 does not land exactly on 0.3 and small errors remain below the decimal point. Errors accumulate with very large or small magnitudes and with repeated trigonometric operations.

Tool Overview & Key Purpose

Scientific calculator for one-line expressions with sin, cos, tan, log, ln, square roots, powers, pi and e, with parentheses, a radian/degree switch and your last ten results.

Step-by-Step Usage Instructions

1STEP 1

Use the keypad to build an expression with numbers, operators and functions (sin, cos, tan, log, ln, √, ^).

2STEP 2

Set the angle unit with the RAD/DEG button before using trigonometry (it starts in RAD).

3STEP 3

Press = to get the result rounded to 8 decimal places; the last ten expressions and results stay listed beside the keypad.

4STEP 4

Copy the result, or save it to the calculation history to load it again later.

Real-World Scenarios & Practical Cases

3 Practical CasesScenario #1

Trigonometric Distance Calculation

Height on a 30-degree incline over 10 m: in DEG mode, 10 × sin(30) = 5, so the rise is 5 m.

Enter angles in degrees only while DEG mode is on.Scenario #2

Powers and Square Roots

Repeated growth such as 1.05^10 = 1.62889463, or a diagonal √(3^2+4^2) = 5, fits on one line.

The √ key opens a parenthesis for you, so remember to close it.Scenario #3

Logarithmic Signal Gain Calculation

Compute log(100) = 2, ln(e) = 1 or e^2.5 = 12.18249396 instantly.

log is base 10 and ln is base e.Operator precedence and precision

The expression is evaluated with JavaScript Math functions (sin, cos, tan, log10, log, sqrt, powers) and rounded to 8 decimal places.

Pro Tips & Key Considerations

Always verify DEG vs RAD mode before computing trigonometric functions.Use parentheses () generously to maintain proper arithmetic operator precedence.

Frequently Asked Questions (FAQ)

Sources & References

MDN Web Docs — JavaScript Math Object MDN Web Docs — JavaScript Number Precision

Basis: IEEE 754 double-precision floating point with standard operator precedence · 2026-08-28 verified