SolverCalc Free Online Scientific Calculator

Work through a calculation, check an answer, or find a math tool for the problem in front of you.

SolverCalc at a glance

SolverCalc is a free online scientific calculator for arithmetic, powers, roots, logarithms and trigonometry. It evaluates numerical expressions in your browser, while dedicated tools handle equations, fractions, percentages and unit conversions. Enter a calculation, then press =; open ƒ(x) for the scientific keys.

Keyboard shortcuts

Click inside the calculator first and select Calculator mode. Use the on-screen scientific keys for functions such as sin and log.

0–9.Enter a number

+−*/Add, subtract, multiply or divide; use the standard minus key

( )^!%Group, exponent, factorial and percent

Enter=Evaluate the expression

BackspaceRemove the last character

EscClear the current expression

Explore SolverCalc’s calculators

Choose a subject for task-specific inputs and explanations.

Play & practice

The three learning activities below are planned, not yet playable. Code Mode is a separate access feature in the calculator.

Times-Table Race

Recall multiplication facts and review the combinations that need more practice.

Planned · Multiplication

Pizza Fraction Match

Match differently partitioned shapes that represent the same amount.

Planned · Equivalent fractions

Binary Blaster

Build a number by choosing which binary place values to switch on.

Planned · Number systems

Code Mode

Switch modes in the calculator and enter a four-digit code from 0000 to 1000.

Go to the calculator ↑

For teachers & schools

Turn a result into a discussion: ask learners to predict whether it will be positive or negative, explain why their estimate differs, or write a second problem with the same answer. Compare reasoning before comparing speed.

A calculation or an equation to solve?

All the values are known

18 ÷ (3 + 3) = 3

A scientific calculator evaluates a numerical expression. Its answer is a value.

A letter represents an unknown

4x − 7 = 9 → x = 4

An equation solver finds the value that makes both sides equal. Use the algebra tools for variables and symbolic working; the homepage keypad is not a graphing or calculus solver.

Common calculations, explained

Six examples show how to enter different operations. Each demonstrates a separate idea.

Control the order of operations

Multiplication is evaluated before addition. Parentheses make the grouped sum happen first.

Choose the right angle unit

For sin(30) = 0.5, select DEG. Use RAD when your angle is in radians. The triangle shows sine as opposite side divided by hypotenuse.

Raise a number to a power

2^5 = 32

The exponent means five factors of 2 multiplied together. Use the xʸ key for the power operation.

Find a square root

√81 = 9

The √ key returns the principal, non-negative square root. You can check this result because 9 × 9 = 81.

Use log or ln

log(1000) = 3

Log asks which power of 10 gives the input. Choose ln for a logarithm with base e, instead.

Find a percent of a quantity

250 × 18 ÷ 100 = 45

Multiply the quantity by the rate, then divide by 100. This explicit formula avoids relying on a percent key’s special rules for addition or subtraction.

Quick reference: fractions, decimals & percentages

Do not lose the whole number

A mixed number adds a whole-number part to a fraction. In the numerical keypad, write 1 + (1 ÷ 8); adjacent digits do not mean “one and one eighth.”

Common values at a glance
Fraction	Decimal	Percent
1/2	0.5	50%
1/3	0.333…	≈ 33.33%
3/4	0.75	75%
5/8	0.625	62.5%
1/7	0.142857…	≈ 14.29%

The decimal digits repeat for 1/3 and 1/7. ≈ marks a rounded percentage.

Keep multi-step work under control

Reuse a history result. Select a previous answer from History to use it in the next calculation without retyping it.

Hold a value in memory. MS stores a number, MR recalls it, M+ and M− adjust it, and MC clears it.

Copy the final value. Use the calculator’s copy icon when you need the result in your own notes or another application.

Choose a comfortable appearance. The theme buttons and light/dark control change the calculator’s presentation, not its mathematics.

Frequently asked questions about Calc Solver

Is this CalcSolver.net, or the site I found as “calsolver”?

Check the address: this page is SolverCalc.com, not CalcSolver.net. Searches for “calcsolver” or “calsolver” also “calc solver” or “cal solver” can lead to similarly named websites. Follow the instructions on the site you are actually using; features and access codes can differ.

Why does an expression show Error?

Check for a missing operand or an operation outside its allowed domain. Division by zero is undefined; a real-valued logarithm needs a positive input. Break a long expression into smaller parts to locate the problem.

Why can a decimal answer have a tiny extra digit?

Computer arithmetic has finite precision. A displayed value can contain a small representation error even when the mathematical operation is straightforward. Avoid rounding intermediate results, and use the precision required by your problem at the end.

Do I need an internet connection?

Load the site with an internet connection. Do not rely on it as a fully offline application: navigation and connected services may still need the network after the calculator loads.

What information is stored?

Ordinary arithmetic is processed locally. Calculation history and preferences may be saved on your device; code access and embedded services can make website requests. See the privacy policy for site-wide details.

Can I use it in an exam?

Only if the exam’s rules allow this specific type of browser-based tool. Permission to use a physical calculator does not automatically permit a website or phone.

Are loan or grade estimates official results?

No. A lender’s fees, timing and contract terms, or a school’s weighting and rounding policies, can differ from a calculator’s assumptions. Check the applicable rules before relying on an estimate.