A Real Scientific Calculator, Online
Everything a TI-84's scientific mode handles, minus the graphing screen — trig, logs, roots, powers, factorials, computed to the precision you'd expect in a classroom setting. If you just need one number fast, this is quicker than opening the full emulator.
What's In Here
- Trig functions and their inverses: in both radians and degrees.
- Roots and powers: square roots, cube roots, nth roots, powers of any degree.
- Logarithms: log (base-10) and ln (natural log), plus their inverses.
- Factorials: handy for combinatorics and probability.
- Standard arithmetic: full order-of-operations support, nested parentheses included.
Degrees vs. Radians
Most wrong trig answers aren't math errors — they're mode errors. Degree mode treats a full circle as 360°; radian mode treats it as 2π. If the calculator's set to radians and you're thinking in degrees (or the other way around), you'll get a technically correct answer to a question you didn't mean to ask. Check the mode before a trig-heavy problem set.
Where This Comes Up
- Physics and Engineering: Trig identities and vector components show up constantly, and fast, accurate trig values speed up multi-step problems.
- Log Equations: Solving for an exponent, working with pH or decibel scales, or exponential growth/decay all lean on log and ln.
- Probability Setup: Factorials and combinations are the backbone of most probability calculations.
Common Mistake: Degree/Radian Mix-Up, With Real Numbers
sin(30) means two very different things depending on mode. In Degree mode, sin(30) = 0.5 — the clean value most students expect. In Radian mode, that exact same input, sin(30), comes out to roughly −0.988, because 30 radians is nearly five full rotations past zero.
Neither answer is wrong — the calculator did exactly what you told it to do. If your result doesn't match what your textbook or teacher expects, checking the angle mode is the fastest first move, before you start hunting for an algebra mistake that probably isn't there.
Frequently Asked Questions (FAQ)
Degrees and radians both supported?
Yes, set the mode before you calculate anything trig-related — results differ a lot between the two.
Nested parentheses okay?
Yep, standard order of operations, nested parentheses work fine.
Same as the graphing calculator?
No — this is non-graphing calculations only. Use the 2D Graphing Calculator page to plot something.
Factorials included?
Yes, useful for combinatorics and probability work.
Inverse trig functions?
Arcsin, arccos, arctan — all there alongside the regular trig functions.
Separate ln and log?
Yes, natural log and base-10 log are both available as distinct functions.
Is it free?
Yes, no account needed.
Roots beyond square root?
Yes, any degree of root, not just square.
Why is my trig answer wrong?
Check the angle mode first — it's the most common culprit by a wide margin.
Does it round, or show full precision?
Computed at high precision, displayed roughly matching a physical TI-84's screen.