From derivatives to GST, sine to EMI — 48 powerful, free, and beautifully designed tools for every calculation need.
Pick a category below and dive into powerful, free tools crafted for real-world use.
Simple, Arithmetic, Fraction, Ratio, Average, LCM, HCF, Rounding & more  essential math tools.
Explore ToolsSolve equations, factor polynomials, and master algebra step-by-step.
Explore ToolsCompute Area, Perimeter, and Volumetrics of 2D & 3D mathematical shapes.
Explore ToolsCalculate sine, cosine, tangent, inverse functions, and solve triangles easily.
Explore ToolsSolve percentages, taxes, and complex scientific equations with ease.
Explore ToolsCalculate ages, date differences, and convert Unix timestamps instantly.
Explore ToolsConvert units, currencies, number systems, and write numbers in words.
Explore ToolsBMI, EMI, Discount, and GPA tools  practical calculators for everyday life.
Explore Tools56+ carefully crafted tools  all free, all instant, no login required.
Clean, fast calculator for everyday addition, subtraction, multiplication & division.
Add, subtract, multiply, divide with step-by-step solutions and detailed working.
Add, subtract, multiply, and divide fractions with simplified results & steps.
Simplify ratios, solve proportions, and scale ratios with clear working.
Calculate mean, median, mode, range, sum, min & max for any data set.
Find the Least Common Multiple of two or more numbers with prime factorization steps.
Find the Highest Common Factor using the Euclidean algorithm with full working.
Round numbers to decimal places, significant figures, or a custom place value.
Evaluate algebraic expressions with basic grouping and variables.
Solve linear or simple equations for an unknown variable x.
Solve polynomials of degree 2 using the quadratic formula with steps.
Evaluate or find roots of polynomial functions.
Computes logarithm for a given base and x. Includes natural logs.
Computes base to an exponent with steps.
Solves basic algebraic inequalities like 3x - 5 > 10.
Prime factorization for numbers and basic expressions.
Simple %, increase/decrease, fraction to %, value of %.
Add/remove GST, slab-wise breakdown (5%, 12%, 18%, 28%).
Arithmetic, trigonometry, logarithms, roots & factorials.
Calculate future value, interest accrued, and visualize exponential growth.
Exact age, total days lived, next birthday countdown & more.
Convert epoch time to readable date or date to Unix timestamp.
Find the exact days, months, and years between any two dates.
Weight, length, temperature, area  all in one smart converter.
Binary, Decimal, Hexadecimal, Octal  convert instantly.
Convert any number to Roman numerals or decode Roman to Number.
Convert numbers to English words or Indian rupees (Lakh/Crore).
Live exchange rates, historical rates, crypto to fiat conversion.
Calculate your Body Mass Index and get a health status reading.
Calculate monthly EMI for loans, mortgages with interest breakdown.
Find sale price, savings amount, and discount percentage instantly.
Convert GPA to percentage and back  for students worldwide.
Create highly secure, randomized passwords with specific constraints.
Calculate your Basal Metabolic Rate and TDEE maintenance calories.
Quickly find the precise 2D area for various planar shapes.
Compute perimeter and circumference boundaries instantly.
Calculate total cubic capacities for 3D boxes, spheres, and more.
Map the total outer surface areas of your standard geometric bodies.
Extrapolate area and circumference using just one input value.
Use Base & Height or Heron's 3-side Formula to extract Area.
Computes 2D properties and Pythagorean Diagonal spans of rectangles.
Enter an edge and quickly find internal area and perimeters.
A 3D spatial mapping tool for circular volume capacity and TSA.
Determine volumes and distinct Lateral surface areas of cylinders.
Find true mathematical Slant Heights alongside Volumes.
Yes! Every tool on Arattai.it.com is 100% free forever. No registration, no subscription, no hidden fees.
No account needed. Simply open the tool and start calculating instantly. We respect your privacy.
Yes, the Currency Converter fetches live exchange rates so you always get the most up-to-date values for USD, INR, EUR, BTC, and more.
Arattai.it.com uses precise floating-point arithmetic with smart rounding. Results are reliable for both personal and professional use.
Absolutely. Arattai.it.com is fully responsive and optimized for all screen sizes  phones, tablets, and desktops.