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Free Online Calculators for Everyday Needs
Simple, practical calculators for percentages, math, money, dates, health, business, and everyday decisions.
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Why Numveta?
Useful online calculators make common questions easier to answer, without making you work through every formula by hand.
Understand the result
Formula notes and examples explain how common calculations work.
Useful wherever you are
Use the same simple tools on your phone, tablet, or computer.
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Choose a category to find the calculator you need. More subjects join as their tools are prepared.
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Popular Math Calculators
Percentage CalculatorFind a percentage of a number, or work out what percentage one value is of another.Fraction CalculatorAdd, subtract, multiply, or divide two fractions and simplify the result.Ratio CalculatorSimplify a ratio to its smallest whole-number form.Average CalculatorCalculate the arithmetic average of a list of numbers.Probability CalculatorCalculate the probability and odds of an event from possible outcomes.Quadratic Equation CalculatorSolve ax² + bx + c = 0 and show real or complex roots.
Inside the Math collection · 20 tools
From quick percentages to quadratic equations
The current collection brings everyday number questions together in one place. Work with percentages, fractions, ratios, averages, and data; convert between fractions and decimals; explore probability and combinations; or solve powers, roots, and quadratic equations.
Percentages and changes
Fractions and ratios
Averages and statistics
Probability and combinations
Powers, roots, and factorials
Rounding and scientific notation
About Numveta
Everyday calculations, made clearer
Numveta is a growing collection of free online calculators for practical questions at home, school, and work. Use the search to find a tool, or browse a category to explore related calculations.
Online calculators can help you check a percentage, compare values, explore a math problem, or understand a formula without doing every step manually. Each tool focuses on clear inputs and readable results, with examples to help explain the method.
Our Math category includes percentage, fraction, ratio, statistics, probability, and equation calculators. As other subject collections are ready, they can join the same category-first experience.
From the guides
Helpful math articles
Math guide
How to Calculate a Percentage
Learn the basic percentage formula, how to use it in real life, and when to use a calculator instead of doing the math manually.
Read the guide →Math guide
How to Calculate Percentage Increase
This guide shows the percentage increase formula, practical examples, and the difference between increase and percentage difference.
Read the guide →Math guide
How to Calculate Percentage Decrease
Learn how to measure decline from one value to another and avoid confusion between decrease, increase, and difference.
Read the guide →Start calculating
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