How to use
Tap the on-screen keys like a physical scientific calculator. Switch DEG or RAD for sine, cosine, and tangent. The expression line updates as you press buttons; the result panel updates instantly. Press = to lock the answer into the display for the next step.
What it includes
Arithmetic, powers (xʸ), square root, π, e, parentheses, log (base 10), ln (natural log), and sin / cos / tan.
Example: 30° sine (school trig)
Select DEG, tap sin(, then 30, then ). Result: 0.5. For cos(60) in degrees you get 0.5 as well.
Example: circle area r = 5
Tap π, ×, 5, xʸ, 2, = → about 78.54. That is πr² with r = 5.
Example: log and sqrt combined
log(1000)+√(49): log gives 3, sqrt gives 7, sum is 10—useful for checking homework steps.
Limits
No graphing, programming mode, or complex numbers. Very large or tiny results may show in scientific notation on the result panel.
How do I use a scientific calculator online?
Open this page and tap the keypad—no download. Choose DEG if your homework uses degrees (common in school trig). Build the expression with number and function keys, then read the result on the right. You can still edit the expression line with the keyboard if you prefer typing.
How do I calculate sin, cos, or tan?
Select DEG for degrees or RAD for radians, tap sin(, cos(, or tan(, enter the angle, then close with ). Example in DEG: sin(30) gives 0.5. Example in RAD: sin(pi/2) gives 1. Multiply before other operations as usual—use parentheses when unsure.
What is the difference between log and ln on a calculator?
log is base 10 (common logarithm): log(1000) = 3 because 10³ = 1000. ln is base e (natural logarithm): ln(e) = 1. Chemistry and physics often use ln; pH and decibels often use log10. This calculator labels them log and ln to match textbook notation.
How do I do powers or exponents?
Use the xʸ key for powers: 2 xʸ 10 means 2¹⁰ = 1024. For square roots use √ (sqrt). Order of operations applies: 2+3*4 = 14, not 20. Use parentheses to group, e.g. (2+3)*4 = 20.
Why does my expression show no result?
Usually a missing parenthesis, an empty function like sin(), or unsupported text. Only use the provided keys and standard operators. Implicit multiplication is not allowed—you need an explicit * between a number and a parenthesis.
Online scientific calculator vs phone app?
This page runs in a browser tab—handy when you cannot install apps or need a large keypad on desktop. Feature set focuses on expressions for algebra and trig practice, not unit conversion or currency.
How to switch degrees and radians?
Use the DEG / RAD toggle above the display. DEG treats angles inside sin(, cos(, and tan( as degrees. RAD uses radians (π-related values). Switch before you start the trig part of your calculation.
Can I type instead of clicking?
Yes. The expression line accepts keyboard edits. Still use * for multiplication and match function names (sin, cos, tan, log, ln, sqrt). The on-screen keys insert the correct spelling automatically.