Scientific Calculator
Perform trigonometric, logarithmic, and power calculations
What Is the Scientific Calculator?
This scientific calculator supports basic arithmetic along with trigonometric functions (sin, cos, tan), logarithms (log, ln), square/cube powers, square roots, and the constant π. Scientific calculators as a category date back to 1972, when Hewlett-Packard released the HP-35 — the first handheld calculator capable of trigonometric and logarithmic functions — which effectively made the centuries-old slide rule obsolete within a few years.
Every expression you type is evaluated using standard mathematical order of operations (often remembered as PEMDAS or BODMAS): parentheses first, then exponents and roots, then multiplication and division, then addition and subtraction, always working left to right within each level. This matters because 2 + 3 × 4 is not the same as (2 + 3) × 4 — the calculator follows the same precedence rules used in algebra, programming languages, and every other standard calculator.
For calculations that need only the four basic operations, the Basic Calculator is a simpler alternative, while the dedicated Logarithm Calculator supports logarithms in any base, not just base 10 or base e.
How Is the Scientific Calculator Calculated?
Each function button inserts the corresponding operation into your expression — trigonometric functions operate on radians, log uses base 10, and ln uses the natural base e, matching standard calculator and programming conventions.
Radians and degrees are two different units for measuring the same angle: a full circle is 360 degrees or 2π radians, so 90 degrees equals π/2 radians and 180 degrees equals π radians. This calculator always works in radians, which is the default in nearly every programming language and higher-level math course, so if you're used to entering degrees on a handheld calculator, convert first by multiplying your degree value by π/180.
Scientific Calculator Example
Typing sin(0) and pressing = returns 0, since the sine of 0 radians is 0.
Typing 2+3×4 and pressing = returns 14, not 20 — multiplication is evaluated before addition, so 3×4 = 12 is computed first, then 2 is added.
Typing log(100) and pressing = returns 2, since log is base-10 here and 10² = 100.
How to Use the Scientific Calculator
Step 1
Tap number and operator buttons to build your expression.
Step 2
Use √, x², x³, log, ln, sin, cos, or tan for advanced functions.
Step 3
Press = to evaluate the expression.
Step 4
Press C to clear and start over.
Step 5
Use parentheses to control the order in which operations are evaluated.
Step 6
Remember to convert degrees to radians (× π/180) before using sin, cos, or tan if your source values are in degrees.
Benefits
- Combines basic arithmetic with trigonometric, logarithmic, and power functions in one tool.
- No installation needed — works directly in your browser.
- Familiar button layout similar to a physical scientific calculator.
- Follows standard order of operations automatically, so you don't have to manually sequence a calculation.
- Free to use with no ads interrupting your calculation.
- Captures your full expression and result together in a shareable branded image card.
Common Scientific Calculator Scenarios
Scenario 1
Homework and exam preparation involving trigonometry or logarithms.
Scenario 2
Quick engineering or physics calculations.
Scenario 3
Verifying calculations from other tools or textbooks.
Scenario 4
Working through multi-step expressions that combine several functions at once.
Scenario 5
Checking log-scale or exponential calculations, like pH, decibels, or earthquake magnitude problems.
Scenario 6
Replacing a physical scientific calculator when studying or working from a browser.
Understanding Your Result
The result reflects the exact evaluation of your typed expression, following standard order of operations. An "Error" result means the expression was incomplete or invalid — check for unmatched parentheses or missing operands.
Because the calculator works in radians by default, a trig result that looks "wrong" is very often correct math applied to the wrong angle unit — double check whether your original problem expects degrees or radians before assuming the calculator made an error.
Tips
- Remember that trigonometric functions here use radians, not degrees.
- Close every open parenthesis before pressing = to avoid errors.
- Use π as a constant directly in expressions, like 2×π.
- Build long expressions in smaller pieces first if you're not sure the full calculation is being sequenced the way you expect.
- Use log for base-10 problems (like pH or decibels) and ln for problems involving natural growth or decay.
Common Mistakes
- Entering degrees into sin/cos/tan expecting radian-based results, causing unexpected answers.
- Forgetting to close a parenthesis after using √, sin, cos, tan, log, or ln.
- Chaining operators without a value between them (like "5 + × 2").
- Confusing log (base 10) with ln (base e) when a problem specifically requires one or the other.
- Assuming operations are evaluated strictly left to right, ignoring that multiplication and division take precedence over addition and subtraction.
Frequently Asked Questions
What units do the trig functions use?
sin, cos, and tan operate on radians, consistent with standard JavaScript math functions — convert degrees to radians (× π/180) first if your problem gives you an angle in degrees.
What does "log" vs "ln" mean?
log computes the base-10 logarithm (asking "10 to what power gives this number?"), while ln computes the natural logarithm using base e ≈ 2.71828.
Why do I get "Error"?
An error usually means the expression is incomplete or invalid — check that all parentheses are closed and operators have values on both sides, or that you haven't tried something mathematically undefined like log of a negative number.
How do I convert degrees to radians?
Multiply the degree value by π/180 — for example, 90 degrees is 90 × π/180 = π/2 radians, and 180 degrees is exactly π radians.
Can I use nested parentheses?
Yes, the calculator supports standard nested parentheses for grouping operations, as long as every opening parenthesis has a matching closing one.
What's the difference between DEG and RAD modes?
DEG (degrees) and RAD (radians) are two different units for measuring angles — trigonometric functions give different results depending on which mode is active. This calculator always evaluates in radians, so convert any degree values first by multiplying by π/180.
Can this calculator handle very large or very small numbers?
Yes, within the limits of standard floating-point precision — extremely large or small numbers may display in scientific notation, such as 1e+21 or 5e-8.
What does the π (pi) button do?
It inserts the mathematical constant pi (approximately 3.14159) into your expression, useful for calculations involving circles, angles, and trigonometry.
Why does log(0) or log of a negative number show an error?
Logarithms are mathematically undefined for zero and negative numbers, since there's no real exponent that produces zero or a negative result, so the calculator returns an error rather than a numeric result for those inputs.
Can I share my calculation as an image?
Yes — tap Share and, on supported devices, your calculation is shared as a branded image card, not just a text link.
What is scientific notation, and when will I see it in a result?
Scientific notation expresses very large or very small numbers as a value multiplied by a power of 10 (like 1.5e+9 for 1,500,000,000). You'll typically see it when a calculation produces a result too large or too small to display conveniently in standard decimal form.
What does order of operations (PEMDAS) mean for how this calculator reads my expression?
It means parentheses are evaluated first, then exponents/roots, then multiplication and division, then addition and subtraction — always left to right within the same level, exactly as taught in algebra.
What's the difference between the x² and x³ buttons?
x² squares your current value (raises it to the power of 2), while x³ cubes it (raises it to the power of 3) — for example, 5 with x² gives 25, while 5 with x³ gives 125.
What is the constant e, and where does it come from in this calculator?
Euler's number e (approximately 2.71828) is the base of the natural logarithm, used by the ln button. It arises naturally in problems involving continuous growth or decay, such as compound interest or radioactive decay.
References
Important Information
Trigonometric functions use radians. Expressions are evaluated using standard order of operations.
Last updated: July 25, 2026