AJ Design Software provides programs, freeware applications, tools, solutions, and online calculators for engineering, design, science and education problems.

Miscellaneous
Force Equation Calculator	Solve problems related to force, mass and acceleration.
Fourier Number Calculator	Solve problems related to Fourier number dimensionless value, heat transfer and conduction, thermal diffusivity, characteristic time and length.
French Drain Design Calculator	Solves problems related to French drains, seepage rate or flow per foot of trench, permeability, area normal to flow per foot of trench and flow line slope.
Geotextile Calculator	Solve problems related to geotextile, permittivity, normal and plane hydraulic conductivity, transmissivity and fabric thickness.
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.
Gross Domestic Product Calculator	Solves problems related to GDP, consumption, investment, government spending, imports and exports.
Gutter Design Calculator	Solves problems related to curb type gutters, capture flow rate, carry over, bypass, roadway cross slope, longitudinal slope, flow width, Manning's coefficient, openings, inlets, interception capacity, slotted pipe drain inlets, orifices, grate perimeter, weirs, carryover and efficiency.
Hardness Test Calculator	Solves problems related to hardness testing, Brinell hardness number, load, steel ball diameter and depression diameter.
Heart Rate Calculator	Solves problems related to heart rate reserve, maximum heart rate, standard and Karvonen target heart rate and resting heart rate.
Horsepower Estimate Calculator Elapsed Time	Estimate engine or motor horsepower given elapsed time of a quarter mile run and vehicle weight. Calculation include a plot of horsepower versus time.
Horsepower Estimate Calculator Trap Speed	Estimate engine horsepower given trap speed velocity at the end of a quarter mile run or drag race and car or vehicle weight. Calculation include a graph of horsepower versus velocity.
Human Body Surface Area BSA Medical Calculator	Medical calculator for solving the surface area of a human. Doctors and physicians use this calculator to determine medicine and medication doses and cardiac index.
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 problems related to the ideal or perfect gas law equation, mole, temperature, volume, pressure, specific gas constant and density.
IEEE 754 Binary Word Calculator	Solve problems related to IEEE 754 binary floating point numbers. The calculator shows the conversion of a 32 bit word to a decimal value. It calculates the sign, exponent, fraction, biasing and mantissa. In addition, it determines if the word is normalized or de-normalized.
Impulse Momentum Equations Calculator	Solve for impulse, momentum, mass, velocity change, force and time change.
Inductor Design Calculator	Solve problems related to inductors, wire coil number of turns, coil material permeability, coil area, average coil length, flat spiral air core and inductance.
Inflation Rate Calculator	Solves problems related to inflation rate, consumer price index CPI of this and last year, real interest rate and nominal interest rate.
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.
Knudsen Number Calculator	Solve problems related to Knudsen number, mean free path, representative physical length scale, statistical mechanics and continuum mechanics.
Lewis Number Calculator	Solves problems related to Lewis number, mass and thermal diffusivity, heat transfer and mass transfer.
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.
Logarithm Calculator	Solves various logarithm related equations, formulas and functions. Includes computations for log in any base and calculations in base 2.
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.
Mach Number Calculator	Solves problems related to Mach number, speed of sound, object velocity, subsonic, supersonic, hypersonic, transonic, high speed fluid mechanics and dimensionless values.
Microorganism Disinfection Calculator	Solves problems related to CT value constant, disinfectant concentration and contact time to achieve percentage of bacteria or virus inactivation.
Mixing Design Calculator	Solves problems related to propeller, turbine, paddle, static and pneumatic mixers, laminar and turbulent flow, Reynolds number, power requirement, dissipated power, headloss, water specific weight, flowrate, fluid dynamic viscosity and liquid mass density, rotation speed, atmospheric pressure, air volume, discharge point air pressure, and impeller diameter.
Moment Equation Calculator	Solves problems related to moment, force and lever arm length.
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.
Newton's Second Law Equations Calculator	Solve for any variable in Newtons second law of motion equation. Variables include net force, mass and acceleration.
Nusselt Number Calculator	Solve for problems related to Nusselt number dimensionless value, heat transfer, thermal conductivity, convection heat transfer coefficient and characteristic length.
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, papers, helper worksheets, tests, exams, quizzes, projects, essays, how to guides and homework.
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