Calculators
Clear, fast calculators for percentages, geometry, statistics and the maths you Google weekly.
25 free calculators tools. Every tool runs in your browser, works without an account, and processes files locally whenever the browser allows it.
By the utils.sbs team · Reviewed November 2026
The shelf
All calculators tools
25 tools · updated for 2026
- Basic CalculatorpopularA fast, keyboard-friendly calculator for everyday sums.
- Scientific CalculatorEvaluate expressions with functions, powers and constants.
- Percentage CalculatorWork out percentages, increases and decreases.
- Percent Change CalculatorMeasure the percentage change between two values.
- Ratio CalculatorSimplify ratios and solve equivalent ratios.
- Average CalculatorCalculate mean, median and range from a list.
- Median CalculatorFind the median of any numeric list.
- Mode CalculatorFind the most frequent values in a dataset.
- Standard Deviation CalculatorCalculate population and sample standard deviation.
- Fraction CalculatorAdd, subtract, multiply and divide fractions.
- LCM & GCD CalculatorFind the least common multiple and greatest common divisor.
- Prime Number CheckerTest whether a number is prime.
- Prime FactorizationBreak any integer into its prime factors.
- Quadratic SolverSolve ax² + bx + c = 0 with real and complex roots.
- Triangle CalculatorCalculate triangle area and perimeter from base and height.
- Circle CalculatorFind circle area, circumference and diameter.
- Rectangle CalculatorCalculate rectangle area, perimeter and diagonal.
- Cylinder CalculatorFind cylinder volume and surface area.
- Sphere CalculatorCalculate sphere volume and surface area.
- Pythagorean TheoremSolve the hypotenuse or a missing leg.
- Slope CalculatorFind slope and line equation between two points.
- Distance CalculatorCalculate distance between two coordinate points.
- Midpoint CalculatorFind the midpoint between two points.
- Probability CalculatorCalculate single and complementary event probability.
- Permutation & CombinationCalculate nPr and nCr for any values.
How this shelf works
About calculators tools
Calculators tools handle the small, repeatable jobs that show up between real work: everyday maths. They are built as focused utilities, so each page does one job without asking you to create an account or install software.
Open a tool, add your input, adjust the settings, and download the result. Processing happens in the browser using the platform APIs available for that file type. Files are not uploaded to a server, so the tool keeps working offline once the page has loaded.
Looking for something else? Browse the full tool index or search the catalogue from the homepage.
Calculators tool questions
Are calculators tools free?
Yes. Every calculators tool on utils.sbs is free, requires no account, and has no per-file or per-use charge.
Are my files uploaded when I use a calculators tool?
No. The tools are designed to process input in the browser whenever the platform API allows it. Files are not uploaded to a server for processing.
Do I need to install anything to use these tools?
No. Everything runs in a modern web browser. Open a tool page, use the workspace, and download the result.
How do I choose the right calculators tool?
Each tool page describes what it does, its input and output formats, the engine it uses, and its limitations. Start with the description that matches your job, then open the tool page for the workspace and step-by-step guide.