Scientific Calculator — Free Online
Use this free online scientific calculator for advanced mathematical calculations including trigonometry, logarithms, powers and roots. Supports DEG, RAD and GRAD modes, full memory functions and keeps a history of your recent calculations.
Scientific Calculator
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What Can This Scientific Calculator Do?
This calculator handles all standard scientific operations including trigonometric functions (sin, cos, tan and their inverses), natural and base-10 logarithms, square roots and cube roots, powers (xʸ), factorials, absolute values and the constants π and e. It also includes memory storage (MS, MR, M+, M-, MC) and a calculation history panel.
DEG, RAD and GRAD — Which Should I Use?
DEG (Degrees) — use for everyday angle calculations and most school/university problems. A full circle = 360°.
RAD (Radians) — use for calculus and higher mathematics. A full circle = 2π radians.
GRAD (Gradians) — used in some engineering and surveying contexts. A full circle = 400 gradians.
If you’re unsure use DEG — it’s the most common mode.
How to Use the Memory Functions
MS — stores the current display value to memory.
MR — recalls the stored memory value.
M+ — adds the current value to memory.
M- — subtracts the current value from memory.
MC — clears the memory.
FAQs
What is a scientific calculator used for?
Scientific calculators are used for advanced maths, physics, engineering and science calculations that go beyond basic arithmetic — including trigonometry, logarithms, powers and roots.
What is the difference between sin, cos and tan?
These are trigonometric functions that describe the relationship between angles and sides in a right-angled triangle. Sin = opposite/hypotenuse, cos = adjacent/hypotenuse, tan = opposite/adjacent.
What does log mean on a calculator?
Log (log₁₀) calculates the base-10 logarithm. Ln calculates the natural logarithm (base e). Both are used in science, engineering and finance calculations.
What does n! mean?
n! is factorial — the product of all positive integers up to n. For example 5! = 5 × 4 × 3 × 2 × 1 = 120.
Is this calculator free?
Yes completely free with no sign-up needed.