Full-featured scientific calculator for students, engineers and professionals. Trigonometry, logarithm, powers and more.
Click INV to toggle inverse functions (sin⁻¹, cos⁻¹, tan⁻¹, 10ˣ, eˣ). Switch between DEG and RAD mode for trigonometry. Use MS/MR to store and recall memory values.
Keyboard supported — type numbers and operators directly. Press Enter for equals, Escape to clear.
This free Scientific Calculator is designed specifically for Indian users, using documented calculation methods, with source references shown where applicable. Formulas, units and assumptions are reviewed for the applicable page scope; dated rules are identified where relevant. No sign-up, no download, and no charge — results are instant and displayed in Indian number format (lakhs and crores).
Enter your values in the input fields above and click the Calculate button. Results update immediately. You can modify any input and recalculate as many times as needed. All inputs are processed locally in your browser. Optional Save Setup stores the setup only in your browser; Share Setup creates a URL containing encoded setup values. See the Privacy Policy for details.
The Scientific Calculator uses standard mathematical and scientific formulas based on SI units and internationally recognized conventions. Every formula is cross-verified for accuracy before publication.
This calculator is a mathematical utility. Results depend on the expression and precision used, and should be checked for high-stakes technical or academic work.
CalcuTools India is an independent, free calculator platform covering personal finance, income tax, salary, loans, investments, retirement planning, and health, with formulas and applicable rules checked against the stated methodology or primary/reference sources where applicable. We are not affiliated with any bank, insurance company, NBFC, or financial products distributor. Our calculators are free to use. Some pages may contain clearly labelled partner or affiliate offers; these do not affect the calculation result.
CalcuTools India · India-focused calculators · Updated September 2026 · About Us · How We Verify · Editorial Policy · Disclaimer
Our online scientific calculator handles trigonometry (sin, cos, tan and their inverses), logarithms (log base 10 and natural log), powers (x^y), square roots, cube roots, factorial (!), and memory functions. Used by students, engineers, and scientists across India for JEE, GATE, and professional calculations.
Our calculator supports both degree and radian modes. Switch between DEG and RAD mode before calculating. For JEE and school exams, most problems are in degrees. For engineering and advanced mathematics, radians are standard. sin(30°) = 0.5, cos(60°) = 0.5, tan(45°) = 1. In radians: sin(π/6) = 0.5, cos(π/3) = 0.5.
log(x) calculates logarithm base 10 (common log). ln(x) calculates natural logarithm (base e = 2.71828). These are used in compound interest formulas, pH calculations, decibel levels, and Richter scale. Example: log(1000) = 3, log(100) = 2, ln(e) = 1, ln(1) = 0. For antilog: use 10^x for antilog base 10.