Free online scientific calculator with GCSE/A-Level functions — sin, cos, log, exponent, fractions & degree/radian mode. Designed for UK students, teachers and professionals.
Supports + - × ÷ ^ √, sin, cos, tan, ln, log, π, e, parentheses. Use ^ for power (x² = x^2).
Whether you are sitting GCSE, A-Level, or university STEM courses, a reliable scientific calculator is non-negotiable. The scientific calculator online we provide mimics the layout and functions of popular models like the Casio scientific calculator fx-83GTX and fx-991CW advanced scientific calculator, ensuring you can practise at home without carrying hardware. In 2026, exam boards (AQA, Edexcel, OCR) still require specific calculator models; our tool helps you master operations like statistical calculations, trigonometric equations, and scientific notation before your real exam.
This page also serves as a complete buyer’s guide: discover the best scientific calculator for GCSE, compare Casio fx-85GTX vs fx-991CW, and learn where to buy — scientific calculator Tesco, Argos scientific calculator, or Asda scientific calculator deals. We update all recommendations for 2026 UK curriculum.
| Model | Key features | Ideal for | UK Retailers |
|---|---|---|---|
| Casio fx-83GT CW | Natural display, 260+ functions, GCSE endorsed | GCSE Maths & Science | Tesco, Argos, Amazon |
| Casio fx-85GT CW | Solar powered, table function, advanced stats | GCSE/ A-Level foundation | WHSmith, Asda |
| Casio fx-991CW Advanced | QR code, spreadsheet, 540+ functions, derivative/integral | A-Level, University engineering | Amazon, Argos, Ryman |
| Sharp EL-W531TG | WriteView display, large buttons, UK curriculum | GCSE & iGCSE | Online, John Lewis |
| Desmos scientific calculator (online) | Free web app, accessible, graphing friendly | Classroom & home practice | Desmos.com / TotalCalcHub |
2026 update: The new Casio fx-83GT CW and fx-85GT CW now feature high-contrast LCD and improved navigation — perfect for the latest GCSE specifications.
Pro tip (2026): Many UK schools now allow the Casio fx-991CW in exams; familiarise yourself with its equation solver — our advanced function set includes polynomial roots simulation (solve quadratic via formula).
When you search for “scientific calculator near me” or “casio scientific calculator tesco”, you’ll find multiple variants. For 2026, the Casio fx-83GTX scientific calculator remains the gold standard for GCSE, while the fx-991CW advanced scientific calculator dominates at A-Level. If you prefer a pink scientific calculator or a scientific calculator with fraction button, Casio offers colourful editions. Our online scientific calculator app gives you the same functions: trigonometric, logarithmic, exponent, and even scientific notation calculator mode, ideal for physics and chemistry.
Students frequently ask: “is the desmos scientific calculator allowed in exams?” Desmos is a fantastic practice tool, but exam boards typically require a dedicated handheld. Use our tool as your daily practice driver, then transition to your physical Casio before test day.
| Function | Button / Syntax | Example (2026 syllabus) |
|---|---|---|
| Sine / Cosine / Tangent | sin( , cos( , tan( | sin(30) = 0.5 (DEG mode) |
| Natural log / log₁₀ | ln( , log( | ln(7.389) ≈ 2 |
| Square root | sqrt( | √144 = 12 |
| Powers / exponent | ^ or ** | 2^10 = 1024 |
| Pi (π) | π | Area = π × r² |
| Scientific notation | e.g., 3.2e5 | 320000 |
Using our calculator scientific interface is intuitive: click buttons or type directly (keyboard support: numbers, +, -, *, /, ^, parentheses). For trig functions, ensure the angle unit matches your question (DEG for geometry, RAD for calculus). You can also perform calculations in scientific notation by using “e” (e.g., 6.022e23). The realcalc scientific calculator style is emulated for accuracy. Additionally, our scientific calculator desmos-like experience lets you evaluate complex expressions: sin(45)^2 + cos(45)^2 should yield 1.
If you’re looking for “casio scientific calculator online”, we’ve designed this tool to replicate key Casio workflows: shift functions, brackets, and constant memory. Use it to verify homework, prepare for GCSE 2026 resits, or simply for everyday scientific work.
This online scientific calculator is for educational and estimation purposes only. Always check with your exam centre about permitted models. The tool is not affiliated with JCQ or individual exam boards. Casio, Desmos are trademarks of respective owners. For official exam materials refer to your school.