Free Online Scientific Calculator
Free calc solver and online scientific calculator. Solve algebra, trigonometry, fractions, percentages and logarithms instantly - no download needed. Perfect for basic math or complex mathematical calculations.
Why choose the calcsolver calculator?
Free & instant
No sign-up, no download, no limits. Every online calculator for quick calculations runs in your browser and answers the moment you type.
Shows every step
Get more than a number — see the formula used and a clear step-by-step solution you can actually learn from.
Private & secure
All calculations happen on your device. Your numbers are never uploaded to a server — ever.
How to use the scientific calculator
- 1
Type an expression using numbers, operators (+ − × ÷), and the function/keypad buttons.
- 2
Choose DEG or RAD for trigonometric functions before evaluating angles.
- 3
Use the memory keys (M+, M−, MR, MC) to store and recall a running value.
- 4
Press = (or Enter) to evaluate. The calculator follows standard order of operations.
Supported functions
Toggle DEG / RAD for angles, store values with M+, M−, MR, MC, and type directly with your keyboard — press Enter to evaluate.
An Easy Math Calc Solver that actually explains the math
Calc Solver is a free collection of scientific and academic calculators built for students, teachers and anyone who needs a quick, reliable answer. Unlike a basic calculator that only spits out a number, the calcsolver scientific calculator and our other tools show the formula used and walk through the step-by-step solution — so you not only get the answer, you understand how to reach it.
Each calculator runs entirely in your browser. That means results are instant, nothing is uploaded, and the tools work just as well on a phone as on a laptop. Start with our free online scientific calculator for everyday math, or jump into a specific tool like the percentage calculator, quadratic equation solver, mean calculator or triangle calculator.
Popular calculators
The tools people reach for most — each with worked steps.
- %Scientific CalculatorA full-featured online scientific calculator. Enter an expression and get an exact result — with trigonometry (degrees or radians), logarithms, powers, roots, factorials, constants and memory keys. It works with your keyboard too.Open calculator→
- %Percentage CalculatorWork out percentages three ways: find a percentage of a number, find what percentage one number is of another, or calculate a percentage increase or decrease. Each answer comes with the steps.Open calculator→
- √Quadratic Equation CalculatorEnter the coefficients a, b and c to solve ax² + bx + c = 0. The calculator uses the quadratic formula, reports the discriminant, and shows the full working — including complex roots when they occur.Open calculator→
- ΣMean CalculatorEnter a list of numbers separated by commas or spaces to find the mean (average). You also get the median, mode, range, sum and count — each with the working shown.Open calculator→
- △Triangle CalculatorEnter the three side lengths to find the area (via Heron’s formula), the perimeter, the semi-perimeter and the triangle type. The calculator also checks that the sides form a valid triangle.Open calculator→
- %Fraction CalculatorAdd, subtract, multiply or divide two fractions. The result is shown in lowest terms, as a mixed number and as a decimal, with the full working so you can see how it’s done.Open calculator→
- △Pythagorean Theorem CalculatorUse the Pythagorean theorem (a² + b² = c²) to find a missing side of a right triangle. Find the hypotenuse from the two legs, or find a leg from the hypotenuse and the other leg.Open calculator→
- ×GPA CalculatorWork out your grade point average in seconds. Add each course with its letter grade and credit hours, and the calculator returns your GPA on the standard 4.0 scale. Add or remove courses as needed.Open calculator→
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Five colour-coded collections covering the math you need.
Learning center
Browse our guides by topic — clear, worked explanations for the math you’re studying.