Free Accounting Rate of Return Calculator - Given an initial investment and a set of returns, this calculates the Accounting Rate of Return

Angle of Rotation Calculator - Calculates the clockwise and counterclockwise angle of rotation

Free Balance with Interest Calculator - Calculates the final account balance given a beginning balance, interest rate, and interest crediting period.

Free Blackjack Card Counting Calculator - This calculator allows you to enter a number of players with one deck of cards by simulating an opening blackjack deal using card counting methods.

Free Bond Price Formulas Calculator - Given a face value, coupon percent, yield percent, term, and redemption value, this calculates the price of a bond using the four price formulas for bonds
1) Basic
2) Premium/Discount
3) Base
4) Makeham

Free Caesar Box Calculator - Decodes a Caesar Box, Caesars box, or Caesar's box

Free Chain Discounts and Net Cost Price and Net Cost Equivalent Calculator - Given a chain discount and an original price, this calculates the total discount and net cost price.

Free Change Counting Calculator - This shows you how to make change using the least amount of bills/coins by taking a bill amount and a cash tendered amount from a customer and figuring out the fastest way to make change. Maximum denomination is $100

Free Counting Calculator - Counts up from a number to another number using a factor
Counts down from one number to another number using a factor. Also known as skip counting.

Free Counting by Tens Calculator - Counts by Tens

Free Counting on a Number Line Calculator - Shows addition or subtraction by moving left or right on a number line.

Free Counting with Groups of 10 and Leftovers Calculator - This calculator finds the total using groups of tens and leftover values.

Free Coupon Comparison Calculator - Given a cost of goods, a dollar off coupon, and a percentage off coupon, this calculator will compare the two deals and determine which one is of more value. If the dollar coupon wins, the calculator will project the break even price where the dollar coupon would surpass the percentage coupon

Free Dividend Discount Model Calculator - This calculator determines the present value of dividends using the Dividend Discount Model.

Free Equivalent Annual Cost (EAC) Calculator - Given 2 Items/machines with an Investment Cost, expected lifetime, and maintenance cost, this will calculate the EAC for each Item/machine as well as draw a conclusion on which project to invest in.

Free Expanded Notation Calculator - Writes the expanded notation for a number.

Free Fundamental Rule of Counting Calculator - Given a set of items, this calculates the total number of groups/choices that can be formed using the rule of product.

Free Inclusive Number Word Problems Calculator - Given an integer A and an integer B, this calculates the following inclusive word problem questions:
1) The Average of all numbers inclusive from A to B
2) The Count of all numbers inclusive from A to B
3) The Sum of all numbers inclusive from A to B

Free Installment Sales Method of Accounting Calculator - Given a sales price, cost amount, installment payment amount and term, this will show the accounting for the Installment Payment method.

Free Interval Counting Calculator - Evaluates a set of interval counting statements in the form a(b)c.

Free Inventory Method Calculator - Takes accounting entries using the FIFO (first in first out) and LIFO (last in first out) inventory methods.

Free Method of Equated Time-Exact Method-Macaulay Duration-Volatility Calculator - Given a set of cash flows at certain times, and a discount rate, this will calculate t using the equated time method and the exact method, as well as the macaulay duration and volatility

Free Modified Payback Period Calculator - Given a set of cash inflows, outflows, and a discount rate, this calculates the modified payback period.

Free Multinomial Distribution Calculator - Given a set of x_i counts and a respective set of probabilities θ_i, this calculates the probability of those events occurring.

Free Net Present Value (NPV) - Internal Rate of Return (IRR) - Profitability Index Calculator - Given a series of cash flows C_t at times t and a discount rate of (i), the calculator will determine the Net Present Value (NPV) at time 0, also known as the discounted cash flow model.
Profitability Index
Also determines an Internal Rate of Return (IRR) based on a series of cash flows. NPV Calculator

Free Number Line Calculator - Counts from a point going left and right on a number line

Free Rational,Irrational,Natural,Integer Property Calculator - This calculator takes a number, decimal, or square root, and checks to see if it has any of the following properties:
* Integer Numbers
* Natural Numbers
* Rational Numbers
* Irrational Numbers Handles questions like: Irrational or rational numbers Rational or irrational numbers rational and irrational numbers Rational number test Irrational number test Integer Test Natural Number Test

Free Receivables Ratios Calculator - Given Net Sales, Beginning Accounts Receivable, and Ending Accounts Receivable, this determines Average Accounts Receivable, Receivables turnover ratio, and Average Collection Period.

Free Run Length Encoding Calculator - Given a string, this will determine the run length encoding using repeating patterns of characters.

Free Sequences Calculator - Given a function a(n) and a count of sequential terms you want to expand (n), this calcuator will determine the first (n) terms of your sequence, {a₁, a₂, ..., a_n}

Free Simple Discount and Compound Discount Calculator - Given a principal value, interest rate, and time, this calculates the Accumulated Value using Simple Discount and Compound Discount

Free Simplest Exponent Form Calculator - This expresses repeating algebraic expressions such as 3*a*a*a*b*b into simplest exponent form.

Free Survival Rates Calculator - Given a set of times and survival population counts, the calculator will determine the following:
Survival Population l_x
Mortality Population d_x
Survival Probability p_x
Mortality Probability q_x
In addition, the calculator will determine the probability of survival from t_x to t_{x + n}

Free Unit Savings Calculator - A discount and savings word problem using 2 people and full prices versus discount prices.

Free Vendor Discount Effective Rate of Interest Calculator - Calculates the effective rate of interest earned from a vendor discount for a prepayment of a balance within a certain amount of days for a percentage discount