Free Online Scientific Calculator
Type with the keypad or switch on Code Mode and enter math like sin(30)+2^3. No sign-up, and everything runs in your browser.
Your free calc solver for school, home and money maths.
Why you can trust SolveCalcPro
Every one of our 118 tools, 89 guides and 27 quizzes is free. No account, no paywall, no gated results.
Calculations run in your browser. The numbers you type are not sent to our servers. See the privacy policy.
Each tool lists its formula, a worked example and the common mistakes, so you can check the answer yourself.
Calculator functions are checked in automated tests against hand-worked and published reference values before release.
Finance pages are reviewed by Thomas M, Registered Investment Adviser (South Carolina). Health and finance tools carry clear disclaimers and cite primary sources.
Operated by Hindustan Prime. Last content review September 26, 2026. Read our editorial policy, about page or report a mistake.
What this scientific calculator can do
SolveCalcPro handles everything from basic arithmetic to trigonometry and logarithms. Use the keypad for quick sums, or open Shift for inverse functions such as sin⁻¹ and for cube roots and powers of 10. Results update as you type, and every answer is added to your history so you can reuse it with a click or with ans.
- Trigonometry: sin, cos, tan and their inverses, in degrees or radians.
- Logarithms and powers: log (base 10), ln (natural log), square, cube, xʸ, roots and eˣ.
- Everyday math: percentages, factorials, parentheses, memory (MC, MR, M+, M−) and the last answer.
- Privacy: calculations never leave your device.
How to use Code Mode
Turn on Code Mode above the display, click the screen and type your expression using normal keyboard characters, then press Enter. Use ^ for powers, * and / for multiply and divide, and function names with brackets.
| You type | Meaning | Result |
|---|---|---|
sin(30) | Sine of 30° (DEG mode) | 0.5 |
sqrt(144)+2^3 | Square root plus a power | 20 |
200*15% | 15% of 200 | 30 |
5! | Factorial | 120 |
log(1000) | Base-10 logarithm | 3 |
2pi | Implicit multiplication with π | 6.2832 (RAD) |
Popular math tools
Percentage CalculatorFind a percent of a number, percent change, and increases or decreases.
Fraction CalculatorAdd, subtract, multiply and divide fractions with simplified and mixed-number answers.
Quadratic Equation SolverSolve ax² + bx + c = 0 with the discriminant, roots and vertex.
GCF and LCM CalculatorFind the greatest common factor and least common multiple of up to 8 numbers.Prime Number CheckerTest whether a number is prime and see its factorization and neighbouring primes.
Number Base ConverterConvert between binary, octal, decimal, hexadecimal and any base up to 36.
Statistics CalculatorMean, median, mode, range, variance and standard deviation for any list of numbers.
Pythagorean Theorem CalculatorFind the hypotenuse or a missing leg of a right triangle, plus area, perimeter and angles.
Mortgage CalculatorEstimate a monthly mortgage payment, total interest and total cost.Learn the math
How to Use a Scientific Calculator8 min readOrder of Operations: PEMDAS and BODMAS6 min readHow to Calculate Percentages7 min readHow to Add and Subtract Fractions7 min readHow to Simplify Fractions5 min readExponents and Powers Explained7 min readTest yourself with free quizzes
Kindergarten Math Quiz15 questions · new every attempt1st Grade Math Quiz15 questions · new every attempt2nd Grade Math Quiz15 questions · new every attempt3rd Grade Math Quiz15 questions · new every attempt4th Grade Math Quiz15 questions · new every attempt5th Grade Math Quiz15 questions · new every attemptFrom the blog
How to Study for a Math Test: A Plan That Works8 min readWhy Math Feels Hard (and What Actually Helps)7 min read10 Mental Math Habits That Make You Faster7 min readThe Cost of Waiting: What Ten Years Does to Your Savings8 min readStudent Loan Payments Explained: Interest, Terms and Paying Off Early9 min readThe 50/30/20 Budget Rule: How It Works and How to Adapt It8 min readFrequently asked questions
Is SolveCalcPro really free?
Yes. There is no sign-up, no download and no paywall. The site is supported by advertising.
What is the difference between DEG and RAD?
DEG treats angles in degrees (a full circle is 360) and RAD treats them in radians (a full circle is 2π). Use DEG for school geometry and RAD for calculus and physics. Try sin(30) in DEG and sin(pi/6) in RAD: both equal 0.5.
What is Code Mode?
Code Mode lets you type a whole expression on your keyboard, such as sqrt(64)+5!, instead of pressing keys one at a time. Press Enter to solve it. It is the fastest way to enter long calculations on a laptop.
Which functions are supported?
Addition, subtraction, multiplication, division, powers, square and cube roots, factorials, percentages, sin, cos, tan and their inverses, base-10 and natural logarithms, π, e and the last answer (ans).
Are my calculations saved or uploaded?
No. Everything runs in your browser. Your history is stored only on your device and you can clear it at any time.
What is a calc solver?
An online calculator that can also solve problems, such as equations, fractions and percentages, ideally showing the steps. People search for it as calc solver, calcsolver, calc solve or solver calc. SolveCalcPro is a free calc solver: see our guide, What Is a Calc Solver?
Is SolveCalcPro the same as SolveCalc or CalcSolver?
No. SolveCalcPro is an independent site run by Hindustan Prime. It is not affiliated with other websites that use similar names.
Does it work on a phone or Chromebook?
Yes. The layout adapts to any screen size and works in current versions of Chrome, Safari, Edge and Firefox.
Results are for education and planning. See our disclaimer and editorial policy.
Loading games…
Continue playing
Your favourites
New games
All games
No games found.
Read while you take a break
A short article from the SolveCalcPro blog. Pick another below.