Math Calculators
◆ Numbers & FormulasPercentages, fractions, averages, ratios and full scientific expressions, each one worked out instantly with the method shown.
Scientific Calculator
Trig and inverse trig in degrees, radians or gradians, log and ln, powers, roots, factorials and scientific notation, with the order of operations spelled out.
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Percentage Calculator
Percent of a number, percent change, reverse percentages, percentage points and percent difference, with the working shown for every answer.
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Fraction Calculator
Add, subtract, multiply, divide or simplify fractions and mixed numbers, with the working printed step by step.
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Average Calculator
Mean of any list with weighted, geometric, harmonic and trimmed means, compound returns and the next value needed for a target.
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Proportion Calculator
Find the missing value in a direct or inverse proportion, with the cross multiplication laid out step by step and the constant of proportionality.
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Statistics Calculator
Enter values with frequencies or paste a list for the median, mode, standard deviation, quartiles by three methods, mild and extreme outliers, skewness and z scores.
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Ratio Calculator
Simplify any ratio of two to eight parts, share out an amount to the cent, scale a recipe or mix, and check a screen's true aspect ratio.
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Area, volume, distance and right-angle maths, all in one place.
Math tools for school, work and everyday numbers
The math calculators on OG Calculators cover the calculations people reach for most, from a quick percentage to a full scientific expression. Each one runs instantly in your browser, follows the correct order of operations, and explains its result so you learn the method, not just the answer.
Use the scientific calculator for trigonometry, logs and powers with Deg, Rad and Grad support; the percentage calculator for discounts, tax, tips and percent change; the fraction calculator for simplified fractions and mixed numbers; and the average calculator or statistics calculator for means, medians and the full spread of a data set.
Ratios and proportions round the group out, so scaling a recipe, checking an aspect ratio or solving the classic rule of three all take a few seconds. Every page shares the same clean design, works identically on phones and desktops, and keeps the formula, worked examples and FAQs one scroll away.
Frequently Asked Questions
Are these math calculators free to use?
Yes. Every calculator on OG Calculators is 100% free, with no sign-up, no download and no limits. They run entirely in your browser.
Do the calculators show how the answer was worked out?
Yes. Each one shows the formula it applied and a step-by-step calculation box, so you can follow the method and reuse it in exams or at work.
Do they work on mobile phones?
All calculators are fully responsive and touch-friendly, so they adapt to phones, tablets and desktops automatically.
Is my data stored anywhere?
No. Everything is calculated locally in your browser, and nothing you type is uploaded, stored or shared.