What Calculator — FAQ

Q: Which calculator should I use to record seller-financed payments and calculate payoff amounts?

Use the Loan Payoff Calculator . It lets you enter each payment. It supports missed, skipped, and extra payments. It supports interest rate changes.

Q: Which calculator lets me enter irregular repayments and see the remaining balance?

Use the Loan Payoff Calculator . Enter payments on their actual dates. It supports missed, skipped, and extra payments. It supports interest rate changes.

Q: My lender and I disagree on the amount I owe. Which calculator will compute the current balance?

Use the Loan Payoff Calculator . Enter the complete payment history. The calculator computes the balance using your actual payments and any rate changes.

Q: How do I calculate annualized rate of return (IRR) or gross return for stocks, options, bonds, or mutual funds?

Use the Internal Rate of Return (IRR) Calculator . Select Help in the calculator for setup instructions.

Q: How do I plan financially for retirement, college, or another large expense?

Use the Accurate Investment Calculator . It can include taxes, inflation, and fees. For irregular contributions, use the Ultimate Financial Calculator . For retirement income planning, use the Retirement Calculator .

Q: How much will $60 saved each week grow to in 10 years at a 6% return?

It will be worth $42,717. Use the Future Value Schedule Calculator .

Q: Which calculator should I use to plan quarterly college savings over 12 years?

Use the Savings Calculator for a quick estimate. For a more detailed plan, use the Investment Calculator . It supports inflation and tax adjustments.

Q: I invested $10,000 and sold for $14,687 after 27 months. What were my returns?

Gross return: 46.9%. Annualized return: 18.5%. Use the Return on Investment (ROI) Calculator . To save the scenario or add more transactions later, use the Internal Rate of Return (IRR) Calculator .

Q: I lent $45,000. After one year, I will receive $1,067.17 for 48 months. What is my rate of return?

Gross return: 13.8%. Annualized return: 4.5%. Use the Internal Rate of Return Calculator .

Q: Will a $200,000 cash purchase rented at $6,000 per year for 10 years and sold for $220,000 achieve a 9% return?

No. The result is about $58,565 below a 9% target. Use the Net Present Value Calculator .

Question 1

Which calculator should I use to record seller-financed payments and calculate payoff amounts?

Accepted Answer

Use the Loan Payoff Calculator. It lets you enter each payment. It supports missed, skipped, and extra payments. It supports interest rate changes.

Question 2

Which calculator lets me enter irregular repayments and see the remaining balance?

Accepted Answer

Use the Loan Payoff Calculator. Enter payments on their actual dates. It supports missed, skipped, and extra payments. It supports interest rate changes.

Question 3

My lender and I disagree on the amount I owe. Which calculator will compute the current balance?

Accepted Answer

Use the Loan Payoff Calculator. Enter the complete payment history. The calculator computes the balance using your actual payments and any rate changes.

Question 4

How do I calculate annualized rate of return (IRR) or gross return for stocks, options, bonds, or mutual funds?

Accepted Answer

Use the Internal Rate of Return (IRR) Calculator. Select Help in the calculator for setup instructions.

Question 5

How do I plan financially for retirement, college, or another large expense?

Accepted Answer

Use the Accurate Investment Calculator. It can include taxes, inflation, and fees. For irregular contributions, use the Ultimate Financial Calculator. For retirement income planning, use the Retirement Calculator.

Question 6

How much will $60 saved each week grow to in 10 years at a 6% return?

Accepted Answer

It will be worth $42,717. Use the Future Value Schedule Calculator.

Question 7

Which calculator should I use to plan quarterly college savings over 12 years?

Accepted Answer

Use the Savings Calculator for a quick estimate. For a more detailed plan, use the Investment Calculator. It supports inflation and tax adjustments.

Question 8

I invested $10,000 and sold for $14,687 after 27 months. What were my returns?

Accepted Answer

Gross return: 46.9%. Annualized return: 18.5%. Use the Return on Investment (ROI) Calculator. To save the scenario or add more transactions later, use the Internal Rate of Return (IRR) Calculator.

Question 9

I lent $45,000. After one year, I will receive $1,067.17 for 48 months. What is my rate of return?

Accepted Answer

Gross return: 13.8%. Annualized return: 4.5%. Use the Internal Rate of Return Calculator.

Question 10

Will a $200,000 cash purchase rented at $6,000 per year for 10 years and sold for $220,000 achieve a 9% return?

Accepted Answer

No. The result is about $58,565 below a 9% target. Use the Net Present Value Calculator.

Question 11

Which is better: $150,000 now, or $20,000 for 8 years followed by $10,000 for 5 years?

Accepted Answer

At a 4.5% discount rate, choose the extended payout. Its present value is $170,112. Use the Ultimate Financial Calculator. If the cash flow amount does not change, you can use the Present Value of an Annuity Calculator.

Question 12

I will save every other month: $1,000 now, $2,200 starting in 5 years, and $3,000 starting in 10 years. What will the balance be after 5, 10, and 20 years? What if interest rates change?

Accepted Answer

Use the Ultimate Financial Calculator. It supports irregular deposits and interest rate changes.

Question 13

After I retire, how long will my savings last if I withdraw $2,500 per month and earn 8%? What will I have after 10 years?

Accepted Answer

Use the Annuity Schedule calculator. It shows the depletion date and balances by month and year.

Question 14

What is the interest on a $50,000 loan for 70 days at 11.5% (simple interest)?

Accepted Answer

The interest is $1,102. Use the Interest Calculator.

Question 15

In 20 years, what monthly amount will match the purchasing power of $6,000 today if inflation is 3% for 5 years and 4% for the next 15 years?

Accepted Answer

You will need $12,525 per month. Use the Inflation Calculator. Do the calculation in two steps.

Question 16

How do I calculate my current net worth?

Accepted Answer

Use the Net Worth Calculator.

Question 17

How many units must we sell to break even on a new product?

Accepted Answer

Use the Break Even Point Calculator. Enter fixed costs, unit price, and unit variable cost.

Question 18

Should we lease or buy office furniture? How does depreciation affect the decision?

Accepted Answer

Use the Lease vs Buy Calculator. It includes depreciation in the comparison.

Question 19

Which loan costs less: $150,000 at 8.5% with 0 points, or $150,000 at 8.0% with 3 points paid upfront? What if I move after five years?

Accepted Answer

Use the Accurate Amortization Schedule. Run one case with points and one case without points.

Question 20

How much interest will I save if I pay an extra $100 per month toward principal? Which calculator should I use?

Accepted Answer

Use the Extra Payment Calculator. It also compares extra payments with investing the same amount.

Question 21

How do I model occasional extra payments toward a loan? How much will I save?

Accepted Answer

Use the Ultimate Financial Calculator (UFC). See the tutorials for setup steps.

Question 22

I must provide a Regulation Z APR disclosure. Which calculator should I use?

Accepted Answer

Use the APR Calculator. It is compliant with the Truth in Lending Act.

Question 23

How much can I borrow if I can pay $1,250 per month at 6.5%?

Accepted Answer

Use the Loan Calculator. You can also use the Amortization Schedule.

Question 24

Can we afford a $375,000 home?

Accepted Answer

Use the Affordable House Calculator and the Budget Calculator.

Which calculator should I use?

Frequently Asked Questions

Q. Which calculator should I use to record seller-financed payments and calculate payoff amounts?

Q. Which calculator lets me enter irregular repayments and see the remaining balance?

Q. My lender and I disagree on the amount I owe. Which calculator will compute the current balance?

Q. How do I calculate the annualized rate of return (IRR) or gross return for stocks, options, bonds, or mutual funds?

Q. How do I plan financially for retirement, college, or another large expense?

General Financial Planning

Q. How much will saving $60 per week grow to in 10 years at a 6% annual return?

Q. Which calculator should I use to plan quarterly college savings over 12 years?

Q. I invested $10,000 and sold the investment for $14,687 after 27 months. What are my gross and annualized returns?

Q. I lent $45,000. I will receive $1,067.17 per month for 48 months, with the first payment after one year. What is my rate of return?

Q. Will a $200,000 cash purchase rented at $6,000 per year for 10 years and sold for $220,000 achieve a 9%% return?

Q. Which is better: $150,000 now, or $20,000 for 8 years followed by $10,000 for 5 years?

Q. I will save every other month: $1,000 now, $2,200 starting in 5 years, and $3,000 starting in 10 years. What will the balance be after 5, 10, and 20 years? What if interest rates change?

Q. After I retire, how long will my savings last if I withdraw $2,500 per month and earn 8%? What will I have after 10 years?

Q. What is the interest on a $50,000 loan for 70 days at 11.5% (simple interest)?

Q. In 20 years, what monthly amount will match the purchasing power of $6,000 today if inflation is 3% for 5 years and 4% for the next 15 years?

Q. How do I calculate my current net worth?

General Business Questions

Q. How many units must we sell to break even on a new product?

Q. Should we lease or buy office furniture? How does depreciation affect the decision?

Loan Planning

Q. Which loan costs less: $150,000 at 8.5% with 0 points, or $150,000 at 8.0% with 3 points paid upfront? What if I move after five years?

Q. How much interest will I save if I pay an extra $100 per month toward principal? Which calculator should I use?

Q. How do I model occasional extra payments toward a loan? How much will I save?

Q. I must provide a Regulation Z APR disclosure. Which calculator should I use?

Q. How much can I borrow if I can pay $1,250 per month at 6.5%?

Q. Can we afford a $375,000 home?

Questions?
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