Math Tools

Do math faster: algebra, geometry, statistics and conversions with accurate calculators and clean visualizations for maximum efficiency.

103 tools available

Calculators 87

Engineering Calculators 29

Area calculator

Free online area calculator for rectangle, triangle, circle, trapezoid, ellipse, sector, and parallelogram. Calculate surface area with step-by-step formulas for geometry and construction.

Asphalt calculator

Free online asphalt calculator to estimate the amount of asphalt needed for driveways, roads, and parking lots. Calculate cubic yards, tons, and cost based on area and thickness.

Free online BTU calculator for air conditioning and heating. Calculate BTU requirements based on room size, insulation, climate, and occupancy. Determine the right AC or heater capacity in BTU, tons, and kW.

Beam load calculator

Free online beam load calculator for structural engineering. Calculate maximum deflection, bending moment, and shear force for simply supported and cantilever beams with point loads and distributed loads. Essential tool for engineers and designers.

Brick calculator

Free online brick calculator for construction. Calculate number of bricks and mortar needed for walls. Supports standard, modular, queen, and king brick sizes with mortar joints and waste percentage.

CFM calculator

Free online CFM (Cubic Feet per Minute) calculator for HVAC, ventilation, and air flow calculations. Calculate required air flow based on room size, air changes, or cooling/heating load.

Concrete calculator

Free online concrete calculator for slabs, columns, footings, and tubes. Calculate concrete volume in cubic meters, cubic yards, and cubic feet. Estimate weight and material needed for construction projects.

Drywall calculator

Free online drywall calculator to estimate the number of drywall sheets, screws, joint compound, and tape needed for walls and ceilings. Calculate based on room dimensions with waste factor included.

Duct size calculator

Free online duct size calculator for HVAC systems. Calculate rectangular or round duct dimensions based on CFM and velocity. Essential for air conditioning and ventilation design.

Flow rate calculator

Free online flow rate calculator to calculate volumetric flow rate, velocity, and pipe area. Convert between m³/h, L/min, GPM, and CFM. Essential for plumbing, HVAC, and fluid systems.

Gear ratio calculator

Free online gear ratio calculator to calculate speed ratios, RPM, torque multiplication, and gear teeth for mechanical design. Essential tool for automotive, robotics, and mechanical engineering.

Grade calculator

Free online grade calculator for land grading, site work, and elevation changes. Calculate grade percentage, slope, and elevation differences for drainage, roads, and landscaping projects.

Gravel calculator

Free online gravel calculator to estimate the amount of gravel, stone, or aggregate needed for driveways, paths, and landscaping. Calculate cubic yards, tons, and bags based on area and depth.

Insulation calculator

Free online insulation calculator to estimate the amount of insulation material needed for walls, attics, and ceilings. Calculate based on area, R-value, and insulation type including fiberglass, foam, and cellulose.

Material weight calculator

Free online material weight calculator for steel, aluminum, copper, and other metals. Calculate weight based on dimensions and density for plates, bars, tubes, and sheets.

Mulch calculator

Free online mulch calculator for landscaping projects. Calculate mulch volume needed for rectangular, circular, and triangular garden beds. Determine bags needed and coverage area in cubic yards, cubic feet, and cubic meters.

Paint calculator

Free online paint calculator to estimate the amount of paint needed for walls, rooms, and surfaces. Calculate paint quantity in liters and gallons based on room dimensions, coats, and coverage rate. Perfect for home painting projects.

Pipe volume calculator

Free online pipe volume calculator to calculate internal volume, capacity, and water weight for circular pipes. Calculate based on diameter and length for plumbing and engineering.

Pressure drop calculator

Free online pressure drop calculator for pipes and ducts. Calculate pressure loss for water, air, and gas flow using Darcy-Weisbach equation. Essential for HVAC, plumbing, and fluid mechanics.

Pulley & belt calculator

Free online pulley and belt calculator to calculate speed ratio, RPM, belt length, and pulley sizes. Essential tool for mechanical engineering, conveyor systems, and motor drive calculations.

Rebar calculator

Free online rebar calculator to estimate the number of reinforcement bars needed for concrete slabs, beams, and columns. Calculate rebar quantity, length, and weight based on dimensions and spacing.

Refrigerant charge calculator

Free online refrigerant charge calculator for HVAC and air conditioning systems. Estimate the correct amount of refrigerant needed based on system capacity, line set length, and pipe diameter. Supports R-410A, R-32, R-22, and more.

Roofing calculator

Free online roofing calculator to estimate roof area and materials needed. Calculate by roof pitch or angle, including eaves overhang. Get estimates for shingles, felt, and roofing materials.

Slope calculator

Free online slope calculator to calculate slope percentage, angle, rise over run for roofs, ramps, stairs, drainage, and roads. Convert between degrees, percent, and ratio formats.

Square footage calculator

Free online square footage calculator for rectangles, circles, triangles, trapezoids, parallelograms, rings, and sectors. Calculate area in square meters, square feet, square inches, and square centimeters.

Stair calculator

Free online stair calculator for construction and renovation. Calculate number of steps, rise, run, total length, and angle. Verify against building codes for safe and comfortable staircase design.

Tile calculator

Free online tile calculator to estimate the number of tiles needed for floor and wall projects. Calculate by area or room dimensions, includes grout spacing and waste percentage. Get accurate tile estimates.

Torque calculator

Free online torque calculator to calculate torque from force and distance. Convert between N·m, lb·ft, and lb·in. Essential tool for mechanical engineering, automotive, and physics calculations.

Volume calculator

Free online volume calculator for sphere, cone, cube, cylinder, rectangular tank, capsule, pyramid, ellipsoid, and more. Calculate volume with step-by-step formulas for geometry and engineering.

Financial Calculators 9

Compound interest calculator

Free online compound interest calculator. Calculate compound interest with different compounding frequencies (daily, monthly, quarterly, annually). Perfect for investments, savings, and long-term financial planning.

Discount calculator

Free online discount calculator. Calculate final price, discount amount, and savings percentage. Perfect for shopping, sales, promotions, and finding the best deals.

Effective interest rate calculator

Free online effective interest rate calculator. Calculate effective annual interest rate (EAR) and effective period interest rate from nominal rate and compounding frequency. Perfect for comparing loans and investments.

GST calculator

Free online GST (Goods and Services Tax) calculator. Add or remove GST from any amount. Calculate GST for Australia, Canada, India, Malaysia, New Zealand, Singapore and other countries.

Loan calculator

Free online loan calculator for amortized loans, deferred payment loans, and bonds. Calculate monthly payments, total interest, loan maturity amounts with detailed amortization schedules and charts.

Mortgage calculator

Free online mortgage calculator. Calculate monthly payments, total interest, and total payment for your home loan. Perfect for home buyers, refinancing, and mortgage planning with amortization details.

Simple interest calculator

Free online simple interest calculator. Calculate simple interest, principal, rate, time, or total amount. Perfect for loans, savings, and financial planning with step-by-step calculations and formulas.

Tip calculator

Free online tip calculator to calculate tips, tax, and split bills. Calculate tip amounts, total costs, and amount per person for restaurants, services, and more.

VAT calculator

Free online VAT (Value Added Tax) calculator. Add or remove VAT from any amount. Calculate VAT for UK, EU countries, and other nations. Perfect for invoicing, pricing, and tax calculations.

Health & Fitness 17

Child feeding calculator

Calculate recommended infant feeding amounts based on age and weight. Get personalized formula and milk intake guidelines for babies 0-24 months.

Child calorie calculator

Calculate daily calorie needs for children and teens. Determine recommended calories, macros, and nutrition requirements based on age, activity level, and goals.

Baby percentile

Calculate baby growth percentiles for length, weight, and head circumference using WHO standards. Track infant development from 0-36 months.

Child BMI percentile

Calculate BMI percentile for children and teens aged 2-20 years. Determine weight category using CDC growth charts and BMI-for-age standards.

WHO growth chart

Calculate child growth percentiles and Z-scores using WHO growth standards. Track height and weight development for children 0-19 years old.

1RM calculator

Calculate your one rep max (1RM) using multiple formulas including Epley, Brzycki, and more. Get personalized training weights for strength, hypertrophy, and endurance. Free 1RM calculator for weightlifting.

BMI calculator

Calculate your Body Mass Index (BMI) and determine your weight category and health risks. Free online BMI calculator with detailed health risk assessment.

BMR calculator

Calculate your Basal Metabolic Rate (BMR) using multiple formulas including Mifflin-St Jeor, Harris-Benedict, and more. Get accurate TDEE calculations for weight management.

BSA calculator

Calculate Body Surface Area (BSA) using multiple medical formulas including Du Bois, Mosteller, and Haycock. Free BSA calculator for accurate medical dosing and assessment.

Body Fat calculator

Calculate your body fat percentage using the U.S. Navy Method. Get accurate body fat estimates with measurements of height, weight, neck, waist, and hip circumference.

Body type calculator

Find your body shape and type for females. Free body type calculator determines if you're hourglass, pear, rectangle, inverted triangle, or triangle shape. Get personalized styling tips and waist-hip ratio analysis.

Calorie calculator

Calculate your daily calorie needs for weight loss, weight gain, or maintenance. Free calorie calculator with BMR, TDEE, and macronutrient breakdown. Get personalized calorie goals based on your activity level and fitness goals.

Healthy weight calculator

Calculate your healthy weight range based on BMI, age, and height. Free healthy weight calculator with visual weight status indicator and personalized recommendations.

Ideal weight calculator

Calculate your ideal body weight using multiple scientific formulas including Robinson, Miller, Devine, and Hamwi. Free ideal weight calculator based on height, gender, and body frame.

Lean body mass calculator

Calculate your lean body mass (LBM) using multiple formulas including Boer, James, and Hume. Free LBM calculator to determine muscle mass and body fat percentage for fitness tracking.

Macro calculator

Calculate your daily macronutrient needs (protein, carbs, fats) based on your goals. Free macro calculator for weight loss, muscle gain, and maintenance with personalized recommendations.

Target heart rate calculator

Calculate your target heart rate zones for different fitness goals. Free heart rate calculator with multiple formulas including Karvonen method. Get personalized training zones for fat burning, cardio, and peak performance.

HVAC Calculators 1

HVAC load calculator

Free online HVAC load calculator to estimate heating and cooling requirements for buildings. Calculate sensible and latent heat loads for proper HVAC system sizing.

Math Calculators 31

Binary calculator

Free online binary calculator for binary arithmetic and bitwise operations. Perform addition, subtraction, multiplication, division, AND, OR, XOR, NOT, and shift operations on binary numbers.

Combinatorics calculator

Free online combinatorics calculator. Calculate permutations (nPr), combinations (nCr), and factorials with big integer support for large numbers.

Complex number calculator

Free online complex number calculator for addition, subtraction, multiplication, division, polar/rectangular conversion, and complex functions. Perfect for math and engineering students.

Cosecant calculator

Free online cosecant calculator to compute csc(x) and arccsc(x). Calculate trigonometric cosecant function with step-by-step explanation. Supports degrees and radians.

Cosine calculator

Free online cosine calculator to calculate cosine and arccosine values. Find cosine of any angle and arccosine of any value with step-by-step calculation.

Cotangent calculator

Free online cotangent calculator to compute cot(x) and arccot(x). Calculate trigonometric cotangent function with step-by-step explanation. Supports degrees and radians.

Derivative & integral calculator

Free online derivative and integral calculator with step-by-step solutions. Calculate derivatives, integrals, and partial derivatives symbolically. Perfect for calculus students.

Exponent calculator

Free online exponent calculator to calculate powers and exponents. Compute base raised to any power with step-by-step calculation and explanation.

Factor calculator

Free online factor calculator to find all factors of a number. Calculate factors, factor pairs, and prime factors with step-by-step explanation.

Factorial calculator

Free online factorial calculator to calculate n! (n factorial). Find the factorial of any positive integer with step-by-step calculation and explanation.

Fraction calculator

Free online fraction calculator to add, subtract, multiply, divide, and simplify fractions. Perform fraction operations with step-by-step calculation and explanation.

GCF calculator

Free online GCF calculator to find the greatest common factor of two or more numbers. Calculate GCF with step-by-step explanation and examples.

Haversine calculator

Free online haversine calculator to compute great-circle distance between two coordinates. Calculate shortest distance on Earth's surface with step-by-step explanation.

Hex calculator

Free online hex calculator to convert between hexadecimal and decimal numbers. Perform hex arithmetic operations with step-by-step calculation and explanation.

LCM calculator

Free online LCM calculator to find the least common multiple of two or more numbers. Calculate LCM with step-by-step explanation and examples.

Ln calculator

Free online natural logarithm calculator. Calculate ln(x) with step-by-step explanation and common logarithm values.

Log calculator

Free online log calculator to calculate logarithms with any base. Find log base 10, natural log, and custom base logarithms with step-by-step calculation.

Matrix calculator

Free online matrix calculator with operations including determinant, inverse, transpose, eigenvalues, and matrix multiplication. Perfect for linear algebra students and professionals.

Modular arithmetic calculator

Free online modular arithmetic calculator. Calculate modulo operations, modular inverse, modular exponentiation, and solve modular equations.

Percentage calculator

Free online percentage calculator with 5 different calculation types. Calculate percentage of value, percentage change, increase/decrease, and more. Perfect for discounts, taxes, and financial calculations.

Polynomial solver

Free online polynomial equation solver. Solve polynomial equations of any degree with real and complex roots. Find solutions for linear, quadratic, cubic, and higher-degree polynomials.

Quadratic equation solver

Free online quadratic equation solver. Solve ax² + bx + c = 0 with step-by-step solution using the quadratic formula.

Random number generator

Free online random number generator. Generate random numbers within a specified range with customizable step size and quantity. Perfect for games, simulations, and statistical analysis.

Ratio calculator

Free online ratio calculator to calculate ratios, proportions, and aspect ratios. Find missing values in ratios and solve proportion problems with step-by-step calculation.

Root calculator

Free online root calculator to calculate square roots, cube roots, and nth roots. Find roots of any number with step-by-step calculation and explanation.

Scientific calculator

Free online scientific calculator with advanced mathematical functions including trigonometry, logarithms, exponentials, and more. Perfect for students and professionals.

Secant calculator

Free online secant calculator to compute sec(x) and arcsec(x). Calculate trigonometric secant function with step-by-step explanation. Supports degrees and radians.

Sine calculator

Free online sine calculator to calculate sine and arcsine values. Find sine of any angle and arcsine of any value with step-by-step calculation.

Statistics calculator

Free online statistics calculator. Calculate mean, median, mode, range, variance, standard deviation, z-scores, and quartiles for any dataset.

Tangent calculator

Free online tangent calculator. Calculate tan(x) in degrees or radians and inverse tangent (arctan) with common tangent values table.

Versine calculator

Free online versine calculator to compute versin(x) and inverse versine (aversin). Calculate trigonometric versine function with step-by-step explanation. Supports degrees and radians.

Conversion 10

Area Conversion 1

All Area Units

Convert all area units instantly. Square meters, feet, acres, hectares, square kilometers, miles in one tool.

Energy Conversion 1

All Energy Units

Convert all energy units instantly. Joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, electronvolts in one tool.

Frequency Conversion 1

All Frequency Units

Convert all frequency units instantly. Hertz, kilohertz, megahertz, gigahertz, and revolutions per minute in one tool.

Fuel Consumption Conversion 1

All Fuel Consumption Units

Convert fuel consumption units instantly. Kilometers per liter, liters per 100km, miles per gallon US and UK in one tool.

Length Conversion 1

All Length Units

Convert all length units instantly. Meters, feet, inches, centimeters, kilometers, miles, yards, millimeters in one tool.

Pressure Conversion 1

All Pressure Units

Convert all pressure units instantly. Pascal, bar, psi, atmosphere, mmHg, torr, kilopascal in one tool.

Speed Conversion 1

All Speed Units

Convert all speed units instantly. Kilometers per hour, miles per hour, meters per second, knots, feet per second in one tool.

Temperature Conversion 1

All Temperature Units

Convert all temperature units instantly. Celsius, Fahrenheit, Kelvin conversions with formulas in one tool.

Volume Conversion 1

All Volume Units

Convert all volume units instantly. Liters, gallons, milliliters, cubic meters, quarts, pints, cups in one tool.

Weight Conversion 1

All Weight Units

Convert all weight units instantly. Kilograms, pounds, ounces, grams, tons, stones, milligrams in one tool.

Fun Tools 2

2048 Game

Play the addictive 2048 puzzle game online. Merge tiles, reach 2048, and beat your high score. Multiple board sizes, undo moves, and statistics tracking.

Sudoku

Play Sudoku online for free. Multiple difficulty levels, hints, notes mode, and statistics tracking. Challenge your brain with the classic number puzzle game.