Scientific Calculator - Free Online Tool
A simple scientific calculator that works right in your browser. No downloads needed. Built with a clean light blue design that's easy on the eyes.
What You Can Do
This calculator handles basic math plus scientific functions. Good for students, engineers, or anyone who needs quick calculations beyond simple addition and subtraction.
Basic stuff: Add, subtract, multiply, divide. There's a decimal point button and you can switch numbers between positive and negative.
Scientific functions: Sine, cosine, tangent for angles. Logarithms (both natural and base-10). Square roots, powers, exponentials. Also has factorial calculations and constants like pi and e built in.
How to Use It
Pretty straightforward. Type your numbers using the number pad, then pick what you want to do with them.
For Regular Math
Say you want to add 25 and 17. Click 2, then 5, then the + button, then 1, then 7, then hit equals. Done.
Same pattern works for subtraction, multiplication, division. The C button clears everything if you mess up.
For Scientific Calculations
Here's the thing - you enter the number FIRST, then click the function button. Lots of people get this backwards.
Want cosine of 60 degrees? Type 60, then click cos. That's it.
The calculator starts in DEG mode, which means it expects angles in degrees (like 30, 45, 90). Most school problems use degrees. If you're doing calculus or working with radians, click the DEG button to switch it to RAD mode.
Specific Functions
Trigonometry buttons (sin, cos, tan): Make sure you're in the right mode first. DEG for degrees, RAD for radians. Type your angle, then click the function.
Powers: The x² button squares whatever number you have. x³ cubes it. For custom powers like 2 to the 5th, type 2, click x^y, type 5, then equals.
Square root: Type your number, click the √ button.
Logarithms: ln gives you natural log, log gives you base-10. Type the number first.
Constants: Click π to get pi (3.14159...) or e to get Euler's number (2.71828...).
Factorial: Type an integer, click x! to get its factorial. Works up to 170, after that you get infinity because the numbers get huge.
Reciprocal: The 1/x button divides 1 by whatever you typed.
Tips That Help
The DEG/RAD thing trips people up. If your trig answers look wrong, check which mode you're in.
When you see "Error" it usually means you tried something impossible like dividing by zero or taking the square root of a negative number. Just type a new number to keep going.
The backspace arrow (←) deletes one digit at a time if you mistype.
The ± button flips between positive and negative without retyping everything.
Common Uses
Students use it for homework - geometry, trigonometry, algebra, pre-calculus. The trig functions handle most high school and early college math problems.
Quick conversions work well too. Need to convert between degrees and radians? Type the angle, use the appropriate trig function in both modes to check your work.
Engineers and technicians keep it handy for field calculations when they don't have their regular calculator.
Anyone doing finances can use the power functions for compound interest or the log functions for growth calculations.
Works Everywhere
Runs in any modern web browser. Phone, tablet, computer - doesn't matter. No installation, no sign-up, no tracking. Just a calculator that does its job.
The light blue color scheme was chosen because it reduces eye strain during long calculation sessions. Easy to read in different lighting conditions too.