Math Calculators
◆ Numbers & FormulasPercentages, fractions, averages, ratios and full scientific expressions, each one worked out instantly with the method shown.
Scientific Calculator
Trigonometry, logarithms, powers, roots, factorials and constants with full BODMAS support.
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Percentage Calculator
Percent of a number, percentage change, ratios and percent ↔ decimal ↔ fraction conversion.
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Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers, auto-simplified with decimals.
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Average Calculator
Mean, median, min, max, range and standard deviation of any list, plus weighted averages.
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Proportion Calculator
Solve A/B = C/D by cross multiplication to find any missing value or check a ratio.
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Statistics Calculator
Paste a data set and get the full descriptive statistics: mean, median, mode, range, variance, standard deviation, the five-number summary, IQR and flagged outliers.
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Ratio Calculator
Simplify a ratio to its lowest terms, scale one up or down, share an amount out in a given ratio, or work out an aspect ratio, with the fraction, decimal and percentage forms shown.
Open calculatorWorking with shapes instead?
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.