AJ Design Software provides programs, applications, apps, tools, solutions and calculators for engineering, design, science, finance and education problems.
Popular Calculators  Featured Programs  Websites 
Audio Subwoofer Design Software 
Design software for solving the required
calculations for building bandpass, sealed and vented
speaker and subwoofer box designs. Build, plan and design
your own custom sub boxes and speaker enclosures for
home, car, truck, boat and sport utility vehicle applications.
(Go to the Subwoofer
Index to see more subwoofer related
calculators) 
Circle Equation Calculator 
Solve problems related to circles, math, geometry, diameter, radius, circumference, area, arc, central angle, segment, chord length midpoint and sector. 
Circular Motion Calculator 
Solve problems related to centripetal acceleration, velocity, radius, period, orbits and satellites. 
Compounding and Discount Factors Calculator 
Solve problems related to economics, cash flow factors and symbols, discrete compounding, capital recovery, single payment compound amount, single payment present worth, uniform gradient future worth, uniform gradient present worth, inform gradient uniform series, inform series compound amount, uniform series present worth and uniform series sinking fund. 
Constant Acceleration Motion Calculator 
Online program for calculating various equations related to constant acceleration motion. Calculator includes solutions for initial and final velocity, acceleration, displacement distance and time. Equations can be used for one, two and three dimensional space. 
Density Equations Calculator 
Solve for any variable in density equation. Variables include density, mass and volume. 
Earned Value Management Calculator 
Solve problems related to earned value management, project management, cost performance index, budgeted cost of work performed, actual cost of work performed, schedule performance index, cost variance, schedule variance, variance at completion, budget at completion, estimate at completion and budgeted cost of work scheduled. 
Force Equation Calculator 
Solve problems related to force, mass and acceleration. 
Friction Equations Calculator 
Solve for kinetic friction, static friction, normal force, coefficient, maximum frictional force. 
Geometric Formulas Calculator 
Solve various attributes of shapes and solids. Make calculations for circle, parallelogram, rectangle, square, trapezoid, right circular cone, right circular cylinder, pyramid, rectangular solid, and sphere geometric formulas. Geometry attributes include volume, area, perimeter, surface area, radius, length and circumference. 
Gravity Equations Calculator 
Solves problems related to Newton's law of gravity, universal gravitational constant, mass, force, satellite orbit period, planet mass, satellite mean orbital radius, acceleration, critical speed, escape speed, radius from planet center and Kepler's third law. 
Horsepower Equations Calculator 
Solves various equations related to horsepower. Solve for horsepower, torque, power to weight ratio, and revolutions per minute(rpm). Determine engine and motor performance using the ET and trapspeed methods. Calculate changes in horsepower when after market or performance parts have been added to a vehicle. Determine dyno correction factor. Correct horsepower for normally aspirated internal combustion engines to a standard humidity, pressure and temperature after a dynamometer measurement. 
Hydraulic Radius Calculator 
Solve equations related to hydraulic radius, area of section flow, wetted perimeter, mean depth, top water surface width, Froude number, flow velocity, acceleration of gravity, circular segment, central angle, partially, fully and half filled pipe, and arc length. 
Ideal Gas Law Calculator 
Solve any variable in the ideal or perfect gas law equation. Variables include mole, temperature, volume and pressure. 
Infant Baby Growth Charts 
Provides growth chart percentile calculations for infants, babies and children. Charts and graphs include length for age, weight for length, head circumference for age and stature for age. 
Interest Rate Calculator 
Solves various interest related equations. Includes computations for compound interest, simple interest, annual percentage rates (APR), installment loans and regular deposits. 
Kinetic Energy Calculator 
Solve computations related to kinetic energy, mass and velocity. 
Loan Calculator 
Calculate monthly payment, interest, principal, amortization tables and loan balance for automobile, boat, car, motorcycle, recreational vehicle (RV), house, furniture and truck credit loans. 
Line Equation Calculator 
Solves problems related to lines, the slope intercept line function, distance, x and y. 
Linear Interpolation Calculator 
Solves for the unknown value in linear interpolation for use with numeric charts, data and tables. 
Mortgage Loan Calculator 
Solves problems related to home mortgages, house loans, monthly payment, principal, interest, early payoff date, savings from extra payments and loan balance.

Natural Log Equation Calculator 
Solves problems related to the natural log (ln) equation. 
Ohm's Law Calculator 
Solves for any variable in the Ohm's Law equation. Includes computations for electrical resistance (ohms), power (watts), current (amps) and voltage (volt). 
Overtime Pay Rate Calculator 
Calculate overtime hourly pay rates given normal or standard pay rate. Calculates time and a half, double, triple and quadruple overtime pay rates. Page is related to payroll, work and career. 
Potential Energy Calculator 
Solves problems related to potential energy, mass, acceleration of gravity and height. 
Power Calculator 
Solves for variables related to power, force, time, displacement and velocity. 
Present Worth Analysis Calculator 
Solves problems related to present worth or value, future worth or value, interest rate, number of years and annual payment or cost. 
Pressure Calculator 
Solve for different variables related to force, area, bulk modulus, compressibility, change in volume, fluid column top and bottom pressure, density, acceleration of gravity,
depth, height, absolute, atmospheric and gauge pressure. 
Projectile Motion Calculator 
Solves problems related to projectile motion, vertical displacement and velocity, horizontal displacement and velocity, range, projection angle, time and acceleration of gravity. Note, solutions for time include the addition and subtraction of the quadric square root. 
Pump Calculator 
Solve problems related to cavitation, net positive suction head (NPSH), liquid velocity, impeller centerline inlet pressure, vapor pressure, specific weight of fluid, gravity, pump discharge, total head, pump efficiency, water horsepower and brake horsepower. 
Relative Humidity Calculator 
Solves problems related to relative humidity, actual vapor pressure, dew point temperature and saturated vapor pressure. 
Salary Wage Pay Calculator 
Solves problems related to salary, wage, pay, jobs, career, economy, payroll, check, labor, money, hour, week, day, year and hourly pay. 
Statistics Calculator 
Solves problems related to standard deviation, variance, mean, binomial coefficient, median, samples, standard error parameter, sample size, mean value sample estimate, probability theory, data analysis, variability coefficient and populations. 
Stress Strain Calculator 
Solves solutions related to stress, strain, force, sensors, change in length and original length and area. 
Temperature Conversion Calculator 
Solves problems related to thermometers , Fahrenheit, Celsius and Kelvin. 
Tire Size Conversion Calculator 
Converter to compare different tire sizes. Standard and metric tires are supported. Solve problems related to automobile, car, truck, width, section, aspect ratio, wheel, diameter, circumference, sidewall, height, speed, speedometer and calibration. 
Torque Calculator 
Solves equations in relation to torque, force and distance or length. 
Triangle Equations Calculator 
Solve various attributes of different types of triangles. Triangle types include equilateral, isosceles, right and scalene. Attributes include sides, angles, altitudes, medians, angle bisectors, perimeters, semiperimeters, areas, base, Law of Cosines and Sines, height, radius of circumscribed circles, Pythagorean Theorem, radius of inscribed circles. 
Trigonometry Equations Calculator 
Solves problems related to cosine (cos), sine (sin), tangent (tan), inverse cosine (arccos), inverse sine (arcsin), inverse tangent (arctan), cotangent (cot), secant (sec) and cosecant (csc). 
Weight Loss Equations Calculator 
Solves problems related to basal metabolic rate (BMR), total daily energy expenditure (TDEE), body mass index (BMI), age, height, weight, body fat percentage and lean body mass. Solutions for both men and women. Exercise activity multipliers include sedentary, diet, weight control, light, moderate, high and extreme for males and females. Solve for percent body fat and lean body mass. 
Work Calculator 
Solve problems related to work, force and distance. 

Note: 
This online software site provides a resource for solving math, algebra, chemistry, geometry, trigonometry, physics and science problems. Covers problems and solutions at the grade school, middle school, high school, university and college course levels. Students, teachers, instructors, professors, educators, and tutors feel free to use charts, images, diagrams, formulas, answers, pictures, graphs, plots, code, figures and equations in your school lesson plans, assignments, tutorials, help or review sessions, examples, class room presentations, lectures, research trials, lab experiments, instruction manuals, jobs, careers, work, papers, helper worksheets, tests, exams, quizzes, projects, essays, how to guides and homework. 

