Calculators & Math
Mathematical calculators and computation tools
Our comprehensive collection of calculators covers everything from basic arithmetic to advanced mathematical calculations. Whether you need to calculate triangles, percentages, BMI, GPA, or perform scientific calculations, these tools provide accurate results with detailed explanations. Perfect for students, professionals, and anyone who needs reliable mathematical computation.
Featured Calculators & Math
Common Use Cases
- Performing complex scientific and mathematical calculations
- Calculating geometric properties like triangle measurements
- Computing percentages for discounts, taxes, and changes
- Determining health metrics like BMI and ideal weight
- Calculating academic performance with GPA tools
- Age calculations for planning and legal purposes
All Calculators & Math
Day Counter
Count days between any two dates
Sleep Cycle Calculator
Calculate optimal sleep and wake times
Weekday Calculator
Find the day of week for any date
Age in Days Calculator
Calculate your exact age in days with fun statistics
Historical Date Calculator
Calculate time elapsed since any historical date
Time Zone Offset Calculator
Calculate the time difference between any two time zones
Basic Calculator
Simple arithmetic calculator for everyday calculations
Fraction Calculator
Add, subtract, multiply, and divide fractions with simplification
Ratio Calculator
Solve proportions, simplify ratios, compare ratios, and scale values
Proportion Calculator
Solve proportions with cross multiplication, verify proportions, and work with direct/inverse proportions
Average Calculator
Calculate mean, median, mode, standard deviation, weighted averages, and moving averages
Rounding Calculator
Round numbers to decimal places, nearest multiples, floor, ceiling, and truncate
Significant Figures Calculator
Count sig figs, round to significant figures, and perform operations with proper sig fig rules
Order of Operations Calculator
Solve math expressions step-by-step using PEMDAS rules with parentheses, exponents, and practice mode
Circle Calculator
Calculate radius, diameter, circumference, area, arc length, sector area, and more from any known value
Rectangle Calculator
Calculate area, perimeter, diagonal, and aspect ratio from length and width. Find missing dimensions.
Square Calculator
Calculate area, perimeter, diagonal, inscribed and circumscribed circle radii from any known value.
Parallelogram Calculator
Calculate area, perimeter, diagonals, and height from base, sides, and angles.
Trapezoid Calculator
Calculate area, perimeter, height, median, and diagonals from bases and legs. Supports isosceles trapezoids.
Pentagon Calculator
Calculate area, perimeter, diagonal, apothem, and radii of a regular pentagon from any known value.
Hexagon Calculator
Calculate area, perimeter, diagonals, apothem, and radii of a regular hexagon from any known value.
Polygon Calculator
Calculate area, perimeter, diagonals, apothem, and angles for any regular polygon from 3 to n sides.
Sphere Calculator
Calculate volume, surface area, radius, diameter, and circumference of a sphere from any known value.
Cylinder Calculator
Calculate volume, surface area, radius, height, and dimensions of a cylinder from various input combinations.
Cone Calculator
Calculate volume, surface area, slant height, and dimensions of a cone from various input combinations.
Pyramid Calculator
Calculate volume, surface area, slant height, and dimensions of a square pyramid from various input combinations.
Cube Calculator
Calculate volume, surface area, face diagonal, space diagonal, and all cube measurements from any known value.
Rectangular Prism Calculator
Calculate volume, surface area, space diagonal, and all box measurements from various input combinations.
Ellipse Calculator
Calculate area, circumference, eccentricity, foci, and all ellipse measurements from various input combinations.
Arc Length Calculator
Calculate arc length, chord length, sector area, segment area, and sagitta from radius and angle.
Sector Area Calculator
Calculate sector area, segment area, arc length, chord length, and perimeter from radius and angle.
Quadratic Formula Calculator
Solve quadratic equations ax² + bx + c = 0 with step-by-step solutions showing discriminant, roots, vertex, and parabola properties.
Polynomial Calculator
Add, subtract, and multiply polynomials with step-by-step results. Shows degree, coefficients, leading term, and constant.
Systems of Equations Solver
Solve 2x2 and 3x3 linear systems using Cramer's rule. Get unique solutions, identify inconsistent and dependent systems.
Matrix Calculator
Add, subtract, multiply matrices. Calculate determinant, transpose, and inverse for 2x2 and 3x3 matrices.
Exponent Calculator
Calculate powers, nth roots, scientific notation, and apply exponent laws. Supports negative and fractional exponents.
Logarithm Calculator
Calculate common log (base 10), natural log (ln), logarithms with any base, and antilogarithms.
Factorial Calculator
Calculate n!, double factorial (n!!), subfactorial (!n), and gamma function. Supports large numbers.
Permutation Calculator
Calculate nPr, circular permutations, and permutations with repetition. Supports large numbers.
Combination Calculator
Calculate nCr, combinations with repetition, and Pascal's triangle rows. Supports large numbers.
Probability Calculator
Calculate event probabilities, conditional probability, Bayes' theorem. Convert between formats.
Prime Factorization Calculator
Factor numbers into primes, check primality, find divisors, list primes in a range.
GCD & LCM Calculator
Find greatest common divisor, least common multiple, and Bezout coefficients.
Complex Number Calculator
Perform arithmetic on complex numbers, convert forms, calculate powers and roots.
Vector Calculator
Perform vector operations, dot/cross products, magnitude, and projection. 2D and 3D support.
Modulo Calculator
Calculate remainders, modular arithmetic, congruence, and applications like Luhn algorithm.
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, and coefficient of variation.
Variance Calculator
Calculate population, sample, weighted, and pooled variance with standard deviation.
Z-Score Calculator
Calculate z-scores, find original values, compute probabilities, and compare values.
Regression Calculator
Calculate linear regression, slope, intercept, R-squared, and make predictions.
Correlation Calculator
Calculate Pearson r, Spearman rho, R-squared, p-values, and correlation matrices.
Confidence Interval Calculator
Calculate confidence intervals for means, proportions, and differences with margin of error.
T-Test Calculator
Perform one-sample, two-sample, and paired t-tests with p-values and statistical significance.
Chi-Square Calculator
Perform chi-square goodness of fit and independence tests with p-values and Cramer's V.
Percentile Calculator
Calculate percentile values, percentile ranks, quartiles, IQR, deciles, and detect outliers.
Normal Distribution Calculator
Calculate probabilities, percentiles, and Z-scores for normal (Gaussian) distributions.
Binomial Distribution Calculator
Calculate binomial probabilities, cumulative distributions, range probabilities, and statistics.
Weighted Average Calculator
Calculate weighted averages, GPA from grades and credits, and portfolio-weighted returns.
Force Calculator
Calculate force, mass, and acceleration using Newton's second law (F=ma) with advanced physics formulas.
Velocity Calculator
Calculate velocity, speed, and kinematics with unit conversions and relative velocity.
Acceleration Calculator
Calculate acceleration from velocity change, distance, or gravitational force with planetary comparisons.
Momentum Calculator
Calculate momentum (p=mv), impulse, and collision outcomes. Includes elastic and inelastic collision calculations.
Work Calculator
Calculate work (W=Fd), force, distance, angle, and power. Includes work with angle and power calculations.
Power Calculator
Calculate power from work/time, electrical (P=VI), and mechanical (P=Fv) formulas. Includes horsepower conversions.
Kinetic Energy Calculator
Calculate kinetic energy using KE=½mv². Includes rotational (KE=½Iω²) and relativistic kinetic energy for high-speed physics calculations.
Potential Energy Calculator
Calculate potential energy using PE=mgh for gravitational, PE=½kx² for elastic springs, and PE=kq₁q₂/r for electric charges.
Ohm's Law Calculator
Calculate voltage, current, resistance, and power using V=IR. Includes P=VI, P=I²R, P=V²/R formulas and Ohm's Law wheel.
Resistor Calculator
Calculate series/parallel resistance, decode 4-band color codes, read SMD codes, and design voltage dividers.
Capacitance Calculator
Calculate series/parallel capacitance, stored energy (E=½CV²), capacitive reactance (Xc), and RC time constants.
Roman Numeral Converter
Convert between Arabic numerals (1-3999) and Roman numerals (I-MMMCMXCIX) with step-by-step breakdown.
Number Base Converter
Convert between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) with base 32 and 64.
Decimal to Fraction Converter
Convert decimal numbers to fractions with automatic simplification. View mixed numbers and convert fractions back to decimals.
Mixed Number Calculator
Convert between mixed numbers and improper fractions. Add, subtract, multiply, and divide mixed numbers with automatic simplification.
Scientific Notation Calculator
Convert between decimal and scientific notation. Perform arithmetic operations with numbers in E-notation format.
Golden Ratio Calculator
Calculate golden ratio proportions (φ ≈ 1.618). Find segments, check ratios, and explore powers of phi.
Fibonacci Calculator
Calculate Fibonacci numbers, generate sequences, and check if a number is Fibonacci. Find nth term with golden ratio analysis.
Factors Calculator
Find all factors of any number, get factor pairs, prime factorization, and common factors. Calculate GCD and LCM with step-by-step analysis.
Divisibility Calculator
Check if a number is divisible by another, test divisibility rules for 2-12, and find all divisors of any number.
Chemical Equation Balancer
Balance chemical equations automatically. Enter any reaction and get balanced coefficients with atom count verification.
Concrete Calculator
Calculate concrete needed for slabs, footings, columns, and stairs. Get cubic yards, cubic meters, and bag counts.
Gravel Calculator
Calculate gravel needed for driveways, pathways, and landscaping. Get cubic yards, tons, and bag counts for various gravel types.
Mulch Calculator
Calculate mulch needed for garden beds and landscaping. Get cubic yards, bags, and coverage for various mulch types and depths.
Tile Calculator
Calculate tiles needed for floors, walls, and backsplashes. Includes waste allowance and box calculations for any tile size.
Flooring Calculator
Calculate flooring materials for hardwood, laminate, vinyl plank, and engineered wood with waste allowance and cost estimates.
Wallpaper Calculator
Calculate wallpaper rolls needed for your room. Accounts for pattern repeat, doors, windows, and waste allowance.
Dog Age Calculator
Convert dog years to human years using modern science. Accurate calculations based on breed size and development stages.
Cat Age Calculator
Convert cat years to human years based on veterinary research. Includes life stage information and lifestyle considerations.
Love Calculator
Fun love compatibility calculator. Enter two names to discover your romantic match percentage!
Ovulation Calculator
Predict your fertile window and ovulation date. Track your menstrual cycle to find the best days for conception.
Pregnancy Week Calculator
Find out how many weeks pregnant you are, calculate your due date, and track baby development through each trimester.
Conception Date Calculator
Find out when your baby was conceived. Calculate from due date, last period, or ultrasound results.
BAC Calculator
Estimate your blood alcohol content based on drinks consumed, body weight, and time elapsed.
Snow Day Calculator
Predict the probability of a snow day based on weather conditions. A fun tool for students!
GPA to Percentage Converter
Convert between different GPA scales (4.0, 5.0, 10.0) and percentage grades for academic applications
Simple Interest Calculator
Calculate simple interest on loans, savings, and investments using SI = P × R × T / 100
Investment Return Calculator
Calculate ROI, total return, and annualized CAGR on your investments
Stock Return Calculator
Calculate your stock investment profit or loss including commissions and dividends
Dividend Calculator
Calculate dividend income, yield, and shares needed for target passive income
Dollar Cost Averaging Calculator
Simulate DCA strategy, track average cost over time, and compare with lump sum investing
CAGR Calculator
Calculate compound annual growth rate, future value, or required investment
Rule of 72 Calculator
Quickly estimate how long to double your money or required rate for target time
Savings Goal Calculator
Plan savings goals with required contributions, time to goal, or final amount projections
Emergency Fund Calculator
Calculate how much you need in your emergency fund based on monthly expenses
Net Worth Calculator
Calculate your net worth by subtracting liabilities from assets
FIRE Calculator
Calculate when you can achieve financial independence and retire early
Retirement Calculator
Plan your retirement by calculating how much you need to save based on age and goals
401(k) Calculator
Calculate 401(k) growth with employer matching, contribution limits, and projections
Roth vs Traditional IRA Calculator
Compare Roth and Traditional IRA accounts to find the best retirement savings strategy
Social Security Calculator
Estimate your Social Security retirement benefits based on earnings and claiming age
Auto Loan Calculator
Calculate monthly car payments, total interest, and view amortization schedules for auto loans
Student Loan Calculator
Compare repayment plans, calculate monthly payments, and explore forgiveness options for student loans
Personal Loan Calculator
Calculate monthly payments, compare loan terms, and find the best rates for personal loans
Credit Card Payoff Calculator
Calculate how long to pay off credit card debt and see how extra payments save interest
Debt Snowball Calculator
Pay off debts from smallest to largest for quick wins and motivation on your debt-free journey
Debt Avalanche Calculator
Pay off highest interest debts first to minimize total interest and save the most money
Debt-to-Income Calculator
Calculate your DTI ratio to see if you qualify for mortgages and loans
Refinance Calculator
Calculate if refinancing your mortgage makes sense with break-even analysis
Home Equity Calculator
Calculate home equity and compare HELOC vs home equity loan options
APR Calculator
Calculate true Annual Percentage Rate including all fees and costs
Rent vs Buy Calculator
Compare the true costs of renting versus buying a home over time
Home Affordability Calculator
Find out how much house you can afford based on income and debts
Property Tax Calculator
Calculate annual property taxes based on home value, tax rates, and exemptions
Closing Cost Calculator
Estimate all costs when buying a home including lender fees, title insurance, and prepaid items
Cap Rate Calculator
Calculate capitalization rate, NOI, and property value for real estate investments
Cash on Cash Return Calculator
Calculate cash on cash return for real estate investments with cash flow analysis and property comparison
Rental Yield Calculator
Calculate gross and net rental yield on investment properties with expense analysis and property comparison
Markup Calculator
Calculate markup percentage, profit margin, and selling prices for retail and wholesale
Margin Calculator
Calculate profit margins, set prices from target margins, and analyze comprehensive margin breakdowns
Break-Even Calculator
Calculate break-even point in units and revenue, analyze profitability scenarios, and determine margin of safety
Sales Tax Calculator
Calculate sales tax, find pre-tax amounts, and compute combined rates from multiple jurisdictions
Income Tax Estimator
Estimate federal income tax using 2024 tax brackets for employees and self-employed
Self-Employment Tax Calculator
Calculate Social Security and Medicare taxes for freelancers, contractors, and business owners
VAT Calculator
Calculate Value Added Tax - add VAT, extract VAT from gross amounts, and handle multiple rates
Discount Calculator
Calculate sale prices, stack multiple discounts, and find discount percentages
Tip Calculator
Calculate tips, split bills, and round to convenient totals with tipping guides
Payroll Calculator
Calculate take-home pay, find required salary for desired net, or convert hourly to annual
Hourly to Salary Converter
Convert between hourly wages and annual salaries, and compare job offers side by side
Overtime Calculator
Calculate overtime pay with time-and-a-half, double time, and weekly schedules
Commission Calculator
Calculate sales commissions with simple, tiered, or base salary + commission structures
eBay Fee Calculator
Calculate eBay selling fees, final value fees by category, and determine your true profit margins
Amazon FBA Calculator
Calculate Amazon FBA fees, referral and fulfillment costs, and determine your profit margins
Etsy Fee Calculator
Calculate Etsy selling fees, transaction and processing costs, and determine your profit margins
PayPal Fee Calculator
Calculate PayPal transaction fees, understand fee structures, and determine amounts to request
Stripe Fee Calculator
Calculate Stripe processing fees for different payment types and determine net amounts
Scientific Calculator
Advanced calculator with trigonometric, logarithmic, and memory functions
Triangle Calculator
Calculate triangle properties including area, perimeter, angles, and sides
Time Calculator
Calculate time differences, add or subtract hours/minutes
Date Calculator
Add, subtract, and calculate the difference between dates
Mortgage Calculator
Calculate mortgage payments with property tax, insurance, and PMI
Loan Calculator
Calculate loan payments with amortization schedule and interest breakdown
Percentage Calculator
Calculate percentages, differences, and changes with detailed explanations
Salary Calculator
Convert between hourly, daily, weekly, monthly, and yearly wages with tax calculations
BMI Calculator
Calculate your Body Mass Index to assess weight relative to height
Ideal Weight Calculator
Calculate your ideal weight based on various scientific formulas and methodologies
GPA Calculator
Calculate your Grade Point Average with course credits and grades for academic planning
Age Calculator
Calculate age and time differences between dates
Random Number
Generate random numbers with custom ranges and distributions
Meeting Cost Calculator
Calculate the cost of meetings based on attendees' hourly rates with real-time tracking
Speaking Time Calculator
Calculate how long it takes to speak your text. Estimate presentation time, speech duration, and reading time at different speeds.
Unit Converter
Convert between different units of measurement including length, weight, temperature, and more
Length Converter
Convert between various length units with comprehensive support for metric, imperial, astronomical, and scientific measurements
Weight and Mass Converter
Convert between different units of weight and mass including metric, imperial, precious metals, scientific, and historical units
Volume Converter
Convert between volume units including metric, imperial, cooking, and scientific measurements
Temperature Converter
Convert between temperature units like Celsius, Fahrenheit, Kelvin, and scientific temperature scales
Compound Interest Calculator
Calculate how your investments grow over time with compound interest