Sources

Where every figure on this site comes from: the numbers you type, a fixed formula on every page. Nothing else is assumed.

1. 1Mortgage paymentThe monthly mortgage payment (principal and interest) from price, down payment, rate and term, plus your own property tax, insurance and HOA amounts if you add them. Used by House Buying Costs.
2. 2Down paymentThe down payment on a home or car as a percentage of the price, and the amount left to borrow. Used by Buying And Selling House Costs.
3. 3Price per square footThe price per square foot (or square metre) of a home, a lot or a job, from the price and the area. Used by Cost To Move House.
4. 4Loan to value (LTV)The loan-to-value ratio of a mortgage or secured loan, and the equity, from the loan amount and the property value. Used by Moving Cost.
5. 5Mortgage payoff with extra paymentsHow much sooner a mortgage is paid off, and the interest saved, with an extra monthly payment and a one-time lump sum. Used by Mortgage Payoff.
6. 6Loan paymentThe monthly payment, total interest and total paid on a fixed-rate loan, with a year-by-year schedule. Used by Mortgage Payment.
7. 7Amortization scheduleA year-by-year schedule of a fixed-rate loan or mortgage: principal, interest and balance. Used by Mortgage Amortization.
8. 8Biweekly mortgage paymentsHow much sooner a mortgage is paid off, and the interest saved, by paying half the monthly payment every two weeks. Used by Biweekly Mortgage.
9. 9Pay off by a target dateThe monthly payment needed to pay off a mortgage or loan in a chosen number of years, and the extra that means each month. Used by Mortgage Payoff Date.
10. 10Remaining loan balanceWhat is still owed on a loan after a number of payments, and how much of what you paid went to interest. Used by Remaining Mortgage Balance.
11. 11Refinance savings and break-evenWhat refinancing a loan saves each month, how many months the closing costs take to pay back, and the difference in total paid. Used by Remortgage Savings.
12. 12Mortgage points break-evenWhether buying mortgage discount points pays off: their cost, the monthly saving from the lower rate and how many months it takes to get the cost back. Used by Mortgage Points.
13. 13Debt-to-income ratioYour debt-to-income ratio: monthly debt payments as a percentage of gross monthly income. Used by Debt To Income Ratio.
14. 14Interest-only paymentThe monthly payment on an interest-only loan or mortgage, and the interest paid over the interest-only period. Used by Interest Only Mortgage.
15. 15Balloon paymentA balloon loan: the monthly payment worked out over a long amortization period, and the balance still owed (the balloon) when the loan comes due early. Used by Balloon Mortgage.
16. 16HELOC paymentHELOC payments: interest-only during the draw period, then the payment that repays the balance over the repayment period. Used by Home Equity Loan.
17. 17Cap rate (rental property)The capitalization rate of a rental property: net operating income as a percentage of the property value. Used by Cap Rate.
18. 18Return on investment (ROI)The return on an investment as a percentage, and per year if you give the years held. Used by Return On Investment.
19. 19Compound annual growth rate (CAGR)The compound annual growth rate between a starting and an ending value over a number of years. Used by Property Appreciation.
20. 20Payback periodHow long an investment takes to pay for itself from the cash it brings in each year. Used by Investment Payback.
21. 21Savings goalHow much to save each month to reach a goal by a date, with interest. Used by House Deposit Savings.
22. 22Compound interest and savingsHow savings grow with compound interest and monthly deposits, with a year-by-year table. Used by Compound Interest.
23. 23Loan amount from a paymentHow much you can borrow for a monthly payment you choose, at a rate and term: the loan payment formula worked backwards. Used by How Much Can I Borrow.
24. 24Prorated rentRent for part of a month: a daily rate from the monthly rent, times the days you pay for. Used by Prorated Rent.
25. 25Present valueWhat a future amount is worth today, discounted at a yearly rate. Used by Present Value.

Figures you enter

Some answers depend on your own product, quote or loan. Those calculators ask you for the figure instead of guessing it.

Formulas

Every calculator uses one fixed formula, shown in full on its page under "The formula". The same code works out the result you see and the worked example below it, so the two always agree.

• House Buying Costs Calculator: The monthly mortgage payment (principal and interest) from price, down payment, rate and term, plus your own property tax, insurance and HOA amounts if you add them.
• Buying And Selling House Costs Calculator: The down payment on a home or car as a percentage of the price, and the amount left to borrow.
• Cost To Move House Calculator: The price per square foot (or square metre) of a home, a lot or a job, from the price and the area.
• Moving Cost Calculator: The loan-to-value ratio of a mortgage or secured loan, and the equity, from the loan amount and the property value.
• Mortgage Payoff Calculator: How much sooner a mortgage is paid off, and the interest saved, with an extra monthly payment and a one-time lump sum.
• Mortgage Payment Calculator: The monthly payment, total interest and total paid on a fixed-rate loan, with a year-by-year schedule.
• Mortgage Amortization Calculator: A year-by-year schedule of a fixed-rate loan or mortgage: principal, interest and balance.
• Biweekly Mortgage Calculator: How much sooner a mortgage is paid off, and the interest saved, by paying half the monthly payment every two weeks.
• Mortgage Payoff Date Calculator: The monthly payment needed to pay off a mortgage or loan in a chosen number of years, and the extra that means each month.
• Remaining Mortgage Balance Calculator: What is still owed on a loan after a number of payments, and how much of what you paid went to interest.
• Remortgage Savings Calculator: What refinancing a loan saves each month, how many months the closing costs take to pay back, and the difference in total paid.
• Mortgage Points Calculator: Whether buying mortgage discount points pays off: their cost, the monthly saving from the lower rate and how many months it takes to get the cost back.
• Debt To Income Ratio Calculator: Your debt-to-income ratio: monthly debt payments as a percentage of gross monthly income.
• Interest Only Mortgage Calculator: The monthly payment on an interest-only loan or mortgage, and the interest paid over the interest-only period.
• Balloon Mortgage Calculator: A balloon loan: the monthly payment worked out over a long amortization period, and the balance still owed (the balloon) when the loan comes due early.
• Home Equity Loan Calculator: HELOC payments: interest-only during the draw period, then the payment that repays the balance over the repayment period.
• Cap Rate Calculator: The capitalization rate of a rental property: net operating income as a percentage of the property value.
• Return On Investment Calculator: The return on an investment as a percentage, and per year if you give the years held.
• Property Appreciation Calculator: The compound annual growth rate between a starting and an ending value over a number of years.
• Investment Payback Calculator: How long an investment takes to pay for itself from the cash it brings in each year.
• House Deposit Savings Calculator: How much to save each month to reach a goal by a date, with interest.
• Compound Interest Calculator: How savings grow with compound interest and monthly deposits, with a year-by-year table.
• How Much Can I Borrow Calculator: How much you can borrow for a monthly payment you choose, at a rate and term: the loan payment formula worked backwards.
• Prorated Rent Calculator: Rent for part of a month: a daily rate from the monthly rent, times the days you pay for.
• Present Value Calculator: What a future amount is worth today, discounted at a yearly rate.

House Buying Costs Calculator, Buying And Selling House Costs Calculator, Moving Cost Calculator, Mortgage Payoff Calculator, Mortgage Payment Calculator, Mortgage Amortization Calculator, Biweekly Mortgage Calculator, Mortgage Payoff Date Calculator, Remaining Mortgage Balance Calculator, Remortgage Savings Calculator, Mortgage Points Calculator, Debt To Income Ratio Calculator, Interest Only Mortgage Calculator, Balloon Mortgage Calculator, Home Equity Loan Calculator, Cap Rate Calculator, Return On Investment Calculator, Property Appreciation Calculator, Investment Payback Calculator, House Deposit Savings Calculator, Compound Interest Calculator, How Much Can I Borrow Calculator, Prorated Rent Calculator, Present Value Calculator use the standard loan and interest formulas with the amounts and rates you type. They use no outside figures.

Worked examples

Each calculator page has a worked example with made-up figures, labelled as such. They show how the maths works and are not current prices, rates or product figures.