A fully functional scientific calculator with trigonometric functions (sin, cos, tan), logarithms, square root, powers, absolute value, π and e constants. Works in any browser — no download required.
Enter a number using the digit buttons. For trigonometric functions (sin, cos, tan), enter the angle in degrees, then press the function button. For logarithms, enter the number then press log (base 10) or ln (natural log). For powers, enter the base, press xʸ, then enter the exponent and press =. Use π and e buttons to insert the constants 3.14159… and 2.71828…. The |x| button returns the absolute value of the current number.
Results from this calculator are estimates based on standard floating-point arithmetic and trigonometric/logarithmic functions and are provided for general informational purposes. Rounding, regional standards and manufacturer variations can cause small differences from official or brand-specific figures.
For decisions where precision is critical — engineering, construction or legal contexts — verify results with a qualified professional or an official reference source.
This calculator uses standard floating-point arithmetic and trigonometric/logarithmic functions. The underlying logic was built and manually cross-checked against independent reference calculators and textbook worked examples across dozens of test cases before publication.
Every formula on elCalculador is reviewed by our editorial team for mathematical accuracy, and pages are re-audited whenever a calculator's logic or inputs are updated.