Math Tools

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

89 tools available

Calculators 87

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.

Calculators › Health & Fitness
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.

Calculators › Health & Fitness
Baby percentile

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

Calculators › Health & Fitness
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.

Calculators › Health & Fitness
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.

Calculators › Health & Fitness
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.

Calculators › Health & Fitness
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Health & Fitness
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.

Calculators › Health & Fitness
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.

Calculators › Health & Fitness
BTU calculator

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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Math Calculators
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.

Calculators › Health & Fitness
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.

Calculators › Health & Fitness
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Health & Fitness
Combinatorics calculator

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

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Financial Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Math Calculators
Discount calculator

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

Calculators › Financial Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Financial Calculators
Exponent calculator

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

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Engineering Calculators
Fraction calculator

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

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Financial Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › HVAC Calculators
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.

Calculators › Math Calculators
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.

Calculators › Health & Fitness
Hex calculator

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

Calculators › Math Calculators
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.

Calculators › Health & Fitness
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.

Calculators › Engineering Calculators
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.

Calculators › Math Calculators
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.

Calculators › Health & Fitness
Ln calculator

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

Calculators › Math Calculators
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.

Calculators › Financial Calculators
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.

Calculators › Math Calculators
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.

Calculators › Health & Fitness
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.

Calculators › Engineering Calculators
Matrix calculator

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

Calculators › Math Calculators
Modular arithmetic calculator

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

Calculators › Math Calculators
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.

Calculators › Financial Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Math Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Math Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
Quadratic equation solver

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

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Math Calculators
Scientific calculator

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

Calculators › Math Calculators
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.

Calculators › Math Calculators
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.

Calculators › Financial Calculators
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.

Calculators › Math Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Engineering Calculators
Statistics calculator

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

Calculators › Math Calculators
Tangent calculator

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

Calculators › Math Calculators
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.

Calculators › Health & Fitness
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.

Calculators › Engineering Calculators
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.

Calculators › Financial Calculators
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.

Calculators › Engineering Calculators
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.

Calculators › Financial Calculators
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.

Calculators › Math Calculators
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.

Calculators › Engineering Calculators

Geography & Mapping Tools 2

Geometry Tools

Free GIS geometry tools: create buffer zones, simplify geometries with Douglas-Peucker, clip by bounding box or polygon. Process GeoJSON/WKT data instantly.

Geography & Mapping Tools
Polygon Calculator

Free polygon calculator: calculate area, perimeter, and centroid of any polygon. Draw on map, import GeoJSON/WKT, get results in multiple units instantly.

Geography & Mapping Tools