Math & Utility Calculators
Solve everyday math problems and utilize handy tools for managing time, dates, and numbers efficiently.
Free basic online calculator with memory functions, calculation history, square root, percentage, and full keyboard support.
Easily find percentage values, percent differences, and calculate scored marks quickly.
Calculate the exact percentage increase between two values, or calculate a final value by applying a percentage increase to an initial amount.
Calculate the exact percentage decrease between two values, or calculate a final value by applying a percentage decrease to an initial amount.
A sophisticated app to easily convert numerical numbers and amounts into multiple English, Hindi, and International text formats.
Generate a set of cryptographically secure random numbers with customized ranges and duplication rules.
Calculate your exam marks mathematically. Also supports building an exam subject table to find exact percentages.
Calculate the mean, median, and mode of any set of numbers instantly. Useful for statistics, data analysis, and exam prep.
Calculate slope percentage from rise/run, angle, or two points. Interactive graph, step-by-step solutions, and slope category classification.
Calculate win rates, W-L-D records, and season standings. Includes donut charts, horizontal bar graphs, and points tracking.
Calculate your overall grade from individual assignment and exam scores with custom weightings.
Calculate your GPA (Grade Point Average) for a semester or cumulative across all semesters.
Find out what score you need on your final exam to achieve your desired course grade.
Convert any IQ score to a percentile and population rarity. Supports Standard, Cattell, and Stanine scales. Features a dynamic SVG bell curve with sliding marker and classification table.
Calculate crosswind and headwind/tailwind components for any runway. Enter wind speed, wind direction, and runway heading. Essential for pilots and aviation students.
Decode any tire size (e.g. 205/55R16) and calculate sidewall height, overall diameter, circumference, and revolutions per mile. Compare two tire sizes to find speedometer error.
Calculate monthly and annual fuel savings from carpooling. See your CO₂ reduction, equivalent trees planted, and cars taken off the road. Supports metric and imperial.
Calculate speed, distance, or time using the S = D/T formula. Supports km/h, mph, m/s, and knots. Includes pace calculator for runners and a real-world speed reference table.
Calculate engine RPM from vehicle speed, gear ratio, axle ratio, and tire size. Convert RPM to rad/s, Hz, and degrees/s. Includes SVG gauge and gear ratio reference tables.
Convert nautical miles to km, statute miles, meters, and feet. Bidirectional knots speed converter. Navigation calculator for distance, time, and speed at sea.
Calculate traffic density, flow rate, and Level of Service (LOS A–F) using the Greenshields model. Includes SVG flow-density curve with operating-point marker.
Convert between wheel HP (WHP) and crank HP (BHP) using drivetrain loss percentages. Calculate HP from torque and RPM. Includes HP/kW/PS unit converter and SVG power curve.
Figure out exactly how many pizzas to order for any group. Enter people count, pizza size, and slices per person — includes planning buffer, cost estimator, and event presets.
Calculate log base 10, natural log (ln), log base 2, or any custom base. Includes antilog, log table, change-of-base formula, and logarithm property proofs.
Calculate exact factorials up to 170! using BigInt precision. Includes permutation P(n,r), combination C(n,r), factorial table, and Stirling's approximation in Advanced mode.
Live converter between binary, decimal, hexadecimal, and octal. Step-by-step breakdown, two's complement, IEEE 754 float, bitwise operations, ASCII table, and bit-width selector (4–64 bit).
Split any restaurant or group bill equally, by items, or by percentage. Add tip, track group trip expenses, generate WhatsApp-ready summary, and calculate minimum transactions to settle all debts.
Calculate single event, AND/OR/conditional probability, binomial distribution, normal distribution Z-score, and dice/card/coin probabilities. Includes step-by-step formula breakdown.
Perform matrix addition, subtraction, multiplication, transpose, inverse, determinant, and row echelon form for 2×2, 3×3, and 4×4 matrices. Includes step-by-step working and eigenvalue approximation.
Add, subtract, multiply, and divide fractions with mixed number support. Includes simplify, convert fraction to decimal/percent, compare fractions, and find LCD/GCD with step-by-step working.
Perform addition, subtraction, multiplication, and division with step-by-step working. Includes BODMAS expression evaluator, long division with full working, and LCM/GCD calculator with prime factorization.
Calculate restaurant tips with preset percentages (5–20%) or custom rate. Split among multiple people, choose rounding options, and get a generosity badge. Includes custom-split per person and service-type tipping guide.
Calculate any base raised to any power with step-by-step working. Handles positive, negative, and fractional exponents. Includes nth root calculator, find-exponent tool, and powers table for any base 1–100.
Calculate sin, cos, tan, cot, sec, and cosec with step-by-step working. Includes inverse trig, right triangle SOH-CAH-TOA solver, oblique triangle law of sines/cosines, and 15 trig identity verifier.