Math Calculators
Solve arithmetic, percentages, averages, algebra, geometry, and advanced mathematics problems.
Average Calculator
Compute the arithmetic mean, median, mode, sum, count, and range for any set of numbers.
Bayes' Theorem Calculator
Calculate conditional posterior probability P(A|B), positive predictive value (PPV), false positives, and medical test accuracy.
Best Scientific Calculator
Advanced online scientific calculator. Trigonometric functions (sin, cos, tan), natural and common logarithms, powers, roots, factorials, and memory.
Bin Packing Calculator
Solve 1D Bin Packing Problems using First Fit Decreasing (FFD) and Best Fit Decreasing (BFD) heuristics with theoretical minimum lower bounds.
Binomial Probability Calculator
Compute exact P(X=k) and cumulative binomial probabilities P(X≤k), P(X≥k), distribution mean, variance, and standard deviation.
Chi Square Calculator
Compute Pearson Chi-Square test of independence (χ²), degrees of freedom, p-value, expected frequencies, and Cramer’s V for 2x2 contingency tables.
Coin Flip Probability Calculator
Calculate probabilities for coin toss trials, exact heads/tails count, at least k heads, and consecutive streak probabilities.
Compound Interest Calculator
Calculate investment growth over time with compound interest, regular monthly additions, and detailed yearly amortization schedules.
Concrete Calculator
Calculate concrete volume in cubic yards and cubic meters, ready-mix truckloads, and pre-mixed bag quantities with customizable waste factor.
Cube Root Calculator
Calculate the principal real cube root of positive and negative numbers. Identifies perfect cubes, nearest integer roots, and complex conjugate roots.
Dice Probability Calculator
Calculate dice rolling probabilities for any number of dice across d4, d6, d8, d10, d12, d20, and d100 with exact, at least, and at most sums.
Equation Solver
Solve linear equations (ax+b=0), quadratic equations (ax²+bx+c=0 with discriminant Δ and complex roots), and 2x2 systems with step-by-step solutions.
Grade Calculator
Calculate weighted semester grades, GPA equivalents, and determine the exact score needed on the final exam to achieve your target letter grade.
Hypergeometric Distribution Calculator
Calculate probabilities for sampling without replacement, card draws, lottery ball selections, and quality inspection batches.
Inch to CM Converter
Convert inches to centimeters (cm) and cm to inches with exact decimals, millimeters, feet & inches, and nearest 1/16" and 1/32" fractions.
Loan Calculator
Calculate monthly loan payments, total interest paid, and full loan amortization schedules for personal, auto, or business loans.
Lottery Odds Calculator
Calculate jackpot and secondary tier odds for Powerball, Mega Millions, and custom multi-ball lotteries with expected value.
Normal Distribution Calculator
Calculate probabilities and percentiles for standard and general normal distributions, z-scores, and interval areas.
Odds Probability Calculator
Convert between probability percentages, decimal odds, fractional odds, and American moneyline odds with payout estimates.
Online Calculator
Free standard online digital calculator with memory, square root, percentage, calculation tape history, and full keyboard shortcut support.
Partial Fraction Decomposition Calculator
Decompose rational functions P(x)/Q(x) into partial fractions with linear and repeated roots using Heaviside’s cover-up method for calculus integration.
Percentage Calculator
Quickly calculate percentages, find what percentage one number is of another, and compute percent changes.
Percentage Decrease Calculator
Calculate the percentage drop, markdown, or reduction between two numbers with absolute difference and step-by-step arithmetic.
Percentage Increase Calculator
Calculate the percentage increase or decrease between two values, along with absolute difference and growth multipliers.
Percentage of Time Calculator
Find what exact hours, minutes, and seconds equal a specified percentage of any day, week, month, or custom duration.
Permutations and Combinations Calculator
Calculate combinations nCr and permutations nPr with or without repetition, factorial expansions, and subset ordering.
Poker Odds Calculator
Evaluate 5-card poker hand probabilities, Texas Hold'em pot odds, hand equity, outs, and the Rule of 4 and 2.
Probability Calculator
Calculate the probability of single events, union of events, intersection, conditional probability P(A|B), and complements.
Reverse Percentage Calculator
Find the original number before a percentage increase or decrease was applied with reverse arithmetic equations.
Sphere Packing Calculator
Calculate sphere packing density, discrete count, Kepler maximum theoretical bound (74.05%), and void volume in boxes, cylinders, and vessels.
Student T Value Calculator
Calculate Student t critical values (t*) and p-values for one-tailed and two-tailed tests from degrees of freedom and significance level alpha.
Time Percentage Calculator
Calculate what percentage of a day, shift, project, or custom timeframe has elapsed with intuitive progress bars.
Tip Calculator
Calculate restaurant tips, split bills equally among friends, and round up totals cleanly for stress-free dining.
Wood Calculator
Calculate lumber board feet (BF), linear footage, cubic volume, and material costs for woodworking, milling, and carpentry.
Frequently Asked Questions about Math Calculators
Are the calculators in this category free to use?
Yes. All math calculators on Calculat.dev are 100% free with no account registration or limits.
Are my calculation inputs saved on a database?
No. Every calculation executes client-side directly in your browser. No personal or numeric inputs are recorded or transmitted to any server.
Explore Other Categories
Finance Calculators
Calculate loans, mortgages, compound interest, investments, savings, and retirement planning.
Health Calculators
Monitor your body mass index (BMI), calories, ideal weight, body fat, and wellness metrics.
Date & Time Calculators
Calculate exact age, days between dates, time durations, work days, and countdowns.
Everyday Calculators
Everyday utilities including restaurant tip splitting, discounts, gas mileage, and cooking conversions.