Scientific Calculator
Full scientific calculator with trig, logarithms, powers, factorials and memory-free step-by-step operations.
x² and x³ are applied to the current value. xʸ works like a two-step operation — enter the base, press xʸ, enter the exponent, then press =. Errors such as division by zero or log of a negative number are shown as Error.
Scientific Calculator on True Calculator gives you an instant, accurate answer with no sign-up and no app install. Full scientific calculator with trig, logarithms, powers, factorials and memory-free step-by-step operations. Every result shows the formula and a worked example so you can verify the calculation yourself, and all values are computed in your own browser — your numbers never leave your device.
Popular uses: scientific calculator · online scientific calculator · trig calculator
How We Calculate
This calculator uses standard mathematical formulas — the same ones taught in school and used in exams — verified by our team. All calculations are performed instantly in your browser using JavaScript, so no data is sent to any server.
The formulas follow standard mathematical definitions and conventions used in textbooks and by educational boards. Results are rounded transparently and shown with the exact formula on this page.
When to Use This Calculator
Use this calculator for school and college math and physics across India — trigonometry problems in Class 10 and 11, logarithm work in chemistry, factorials and powers in permutations and statistics. It replaces the separate calculators most students keep for different subjects, and the degrees/radians toggle covers both exam styles. Beyond study, it handles everyday science: percentage changes, square roots for area conversions, reciprocals for RPM and time calculations, and quick exponent checks. The step-by-step button logic mirrors a physical calculator, so muscle memory from a handheld unit carries straight over. When a phone's basic calculator is not enough and a scientific one is not at hand, this covers the full range from simple arithmetic to powers and trigonometry.
How to Use This Calculator
- Step 1: Choose degrees or radians with the toggle — degree mode is standard for everyday angles.
- Step 2: Enter a number with the digit pad, using the decimal point for fractions.
- Step 3: Apply a function (sin, log, √, x!) or an operation (÷, ×, −, +, xʸ) to build the calculation.
- Step 4: Press = to finish, or C to start over; the display shows results up to 10 significant digits.
Worked Example
To calculate 2 raised to the 10th power: press 2, then xʸ, then 10, then = — the display reads 1,024. In degree mode, sin(30) gives exactly 0.5, log(1000) gives 3, and 5! gives 120. The square root of 144 is 12. Each step runs through the same guards as a lab-grade calculator: dividing by zero, taking log of zero, or square-rooting a negative shows Error instead of an undefined result.
Tips and Common Mistakes
- •Use the reciprocal (1/x) and percent buttons for quick conversions mid-calculation.
- •In radian mode, sin(π/2) = 1 — switch modes when solving trigonometry in physics formulas.
- •For very large answers, the display switches to scientific notation like 1×10^20 automatically.
- ✗Do not forget to switch back to degrees after a radians problem — it is the most common trig error.
- ✗Do not press a function twice by habit; functions apply to the current value and reset for the next input.
Frequently Asked Questions
What functions does this calculator support?
Trigonometry (sin, cos, tan in degrees or radians), square and cube roots, log and ln, powers (xʸ), squares, cubes, factorials, percent, reciprocal, π and e. It works step by step like a handheld calculator.
Why does sin(30) give 0.5 in degree mode?
Because the angle is measured in degrees, and the sine of 30° is exactly 0.5. In radian mode, sin(30) means 30 radians, which is about 0.988. Switch modes with the toggle at the top.
How do I calculate 2 to the power 10?
Press 2, then xʸ, then 10, then =. The result is 1,024. Alternatively use the x² and x³ buttons for squares and cubes of the current value.
What happens if I divide by zero?
The display shows 'Error' and the calculation resets — no Infinity or broken state is ever shown. The same happens for log or ln of a non-positive number, and square roots of negatives.
How are very large results displayed?
Results above 10^15 (or below 10^-9) are shown in scientific notation, for example 1×10^20. Pressing the next digit or operator starts a fresh calculation from that value.
You might also need
Related calculators from other categories
Date
Age Calculator
Find your exact age in years, months and days from your date of birth — plus the weekday you were born on. Free and works offline.
Date
Date Difference Calculator
Count the exact number of days, weeks, months and business days between two dates. Perfect for deadlines, leave planning and projects.
Time
Time Duration Calculator
Calculate hours and minutes between two times, across midnight if needed. Ideal for shifts, travel time and event planning.
Health & Fitness
BMI Calculator
Calculate your Body Mass Index instantly and see your WHO weight category — underweight, normal, overweight or obese. Free for men and women.