Math & Statistics Calculators

Percentage Calculator

Find a percentage of any number, calculate percentage increase or decrease, or work out the percentage difference between two values — instantly.

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Scientific Calculator

Full scientific calculator covering trigonometry, logarithms, exponents, and all standard math functions — runs directly in your browser, no download needed.

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Fraction Calculator

Add, subtract, multiply, and divide fractions and mixed numbers instantly — with the fully simplified result shown step by step.

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Average / Mean Calculator

Find the mean, median, and mode of any data set in one click — just paste in your numbers, comma or space separated.

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Square Root Calculator

Calculate the square root, cube root, or any nth root of any number instantly — with exact and decimal results.

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GPA Calculator

Calculate your cumulative GPA for high school or college — supports 4.0 and weighted scales. Enter your grades and credit hours for an instant result.

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Age Calculator

Get your exact age in years, months, and days from any date of birth — plus how many days until your next birthday.

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Standard Deviation Calculator

Calculate population and sample standard deviation, variance, and mean from any data set — paste your numbers and get all results instantly.

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Ratio Calculator

Simplify ratios, solve proportions, and convert ratios to percentages — works for any two or three-part ratio instantly.

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About Our Math & Statistics Calculators

From everyday arithmetic to advanced statistics, our 9 free math calculators give you instant, accurate answers with zero fuss — no app download, no account, and no sign-up required. Whether you are a student, teacher, or just need a quick calculation, every tool works on any device.

Our free percentage calculator handles any percentage problem — find a percentage of a number, calculate a percentage increase or decrease, or work out the percentage difference between two values. The free scientific calculator covers trigonometry, logarithms, exponents, and all standard math functions — no download needed, runs entirely in your browser.

Struggling with fractions? Our fraction calculator adds, subtracts, multiplies, and divides fractions and mixed numbers instantly, showing the fully simplified result. Use the average calculator to find the mean, median, and mode of any data set — just paste in your numbers. The square root calculator handles square roots, cube roots, and nth roots of any number in one click.

For students, our GPA calculator supports both high school and college GPA on 4.0 and weighted scales. The age calculator gives your exact age in years, months, and days from any date of birth. The standard deviation calculator gives you population and sample SD, variance, and mean from any data set. And the ratio calculator simplifies ratios, solves proportions, and converts ratios to percentages. All tools are free, instant, and store none of your data.

  • Percentage calculator — of a number, increase, decrease & difference
  • Scientific calculator — trig, logs, exponents & more
  • Fraction calculator — add, subtract, multiply, divide & simplify
  • Average calculator — mean, median & mode
  • Square root calculator — square, cube & nth roots
  • GPA calculator — high school & college, 4.0 & weighted
  • Age calculator — exact age from any date of birth
  • Standard deviation calculator — population & sample SD
  • Ratio calculator — simplify, proportion & convert

Browse Other Calculator Categories

💰 Finance & Loan Calculators
💪 Health & Fitness Calculators
💼 Business & Tax Calculators
🏠 Home & Lifestyle
🔄 Unit Converters

Frequently Asked Questions

Multiply the number by the percentage then divide by 100. For example, 25% of 80 = (80 × 25) ÷ 100 = 20. Use our free percentage calculator above for instant results on any percentage problem including increases, decreases, and differences.
Percentage increase = ((New Value − Old Value) ÷ Old Value) × 100. For example, a price rising from £50 to £60 is a 20% increase. The same formula applies to decreases — the result is simply negative. Our free percentage calculator handles all three variations instantly.
Mean = sum of all values ÷ count of values. For example, the mean of 4, 8, 6, 10, and 12 is (4+8+6+10+12) ÷ 5 = 8. Use our free average calculator — paste in any list of numbers and get mean, median, and mode in one click.
Standard deviation measures how spread out numbers are from their mean. A low SD means values are close together; a high SD means they are widely spread. It equals the square root of the variance. Use our free standard deviation calculator — paste your data set and get both population and sample SD instantly.
GPA = sum of (grade points × credit hours) for all courses, divided by total credit hours. For example, an A (4.0) in a 3-credit course and a B (3.0) in a 2-credit course gives a GPA of (12 + 6) ÷ 5 = 3.6. Use our free GPA calculator — enter your courses and get your cumulative GPA in seconds.
To add or subtract fractions, find a common denominator then add or subtract the numerators. For example, 1/3 + 1/4 = 4/12 + 3/12 = 7/12. Use our free fraction calculator to add, subtract, multiply, or divide any fractions — including mixed numbers — instantly.
Enter your date of birth into our free age calculator and it instantly shows your exact age in years, months, and days as of today. It also shows how many days until your next birthday. Works for any date format and any country.
Yes — all 9 math and statistics calculators on EverydayCalcPro are completely free. No account required, no subscription, no hidden fees. Every tool works instantly on desktop, tablet, and mobile browsers.