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UtilLab

Advanced Calculator

Perform mathematical calculations with precision. Switch between basic and scientific modes for more advanced operations.

 

Guide

Getting the most out of the scientific calculator

Typing expressions

Type directly on your keyboard or use the keypad. The calculator understands full expressions, so you can write (12 + 8) * 3 / 4 and press Enter instead of calculating step by step. Standard operator precedence applies: parentheses first, then powers, then multiplication and division, then addition and subtraction.

  • ^ raises to a power: 2^10 = 1024.
  • sqrt(x) is the square root and factorial(n) (or the n! key) the factorial: factorial(5) = 120.
  • pi and e are built-in constants.
  • The log key is base 10 (log of 1000 = 3) and ln is the natural logarithm. If you type the function yourself, log10(x) is base 10 and log(x) is natural.

Degrees or radians

In scientific mode the DEG / RAD key decides how sin, cos and tan read their input. With DEG selected, sin(30) returns 0.5; with RAD selected the same key press returns −0.988, because 30 is read as 30 radians. If a trigonometry result looks wrong, this switch is almost always the reason.

History and memory

Each finished calculation is added to the history panel; click an entry to bring it back into the display. The memory keys store a value you want to reuse later, such as a subtotal, without writing it down.

A note on precision

The calculator uses standard 64-bit floating-point arithmetic, the same as most spreadsheets and programming languages. Results are rounded for display, which is why something like 0.1 + 0.2 shows 0.3 even though the stored binary value differs by a tiny amount. For accounting-grade rounding, round the final figure yourself.

Frequently Asked Questions

What operations does the calculator support?
The calculator covers basic arithmetic (addition, subtraction, multiplication, division), as well as scientific functions including trigonometry (sine, cosine, tangent and their inverses), logarithms (log and ln), exponentials, square roots, and factorials. You can switch between basic and scientific modes depending on what you need.
Does the calculator maintain a history of calculations?
Yes. The calculator keeps a history of your calculations within the current session. You can scroll through previous results, click on a past result to reuse it, and pick up where you left off. The history is cleared when you close or refresh the page.
Can I use the calculator on mobile devices?
Yes, the calculator is fully responsive and works on smartphones, tablets, and desktop computers. The layout adapts to your screen size, and all buttons are sized for comfortable use on touch screens.
Does the calculator support scientific notation?
Yes. For very large or very small numbers, results are automatically displayed in scientific notation (e.g., 1.5e+10) to keep the output readable. You can also enter values in scientific notation directly in expressions.
What is the difference between basic and scientific mode?
Basic mode shows the standard arithmetic buttons (digits, +, −, ×, ÷, and a few extras). Scientific mode expands the interface to include trigonometric functions, logarithms, constants like π and e, parentheses for grouping, and exponentiation. Use scientific mode for anything beyond everyday arithmetic.