Financial Calculators
Plan your financial future with our comprehensive suite of free financial tools.
Navigate the complex world of personal finance with confidence. Our Financial Calculators are designed to help you make informed decisions about mortgages, loans, investments, and retirement planning. Whether you're comparing a mortgage, projecting compound interest, or planning a retirement income, these tools give you the clarity to make the next decision.
All Calculators82
Mortgage Calculator - Estimate Monthly Home Loan Payments
Estimate mortgage payments, interest, taxes, insurance, and amortization to compare home loan costs before you buy.
SIP Calculator — Estimate Mutual Fund Returns & Wealth Growth
Enter a monthly investment amount to see total contributions, estimated returns and the future value. $500/month at 12% for 10 years is roughly $115,000. Plan a long-term goal with the assumptions visible.
Salary Calculator — Free Salary to Hourly, Monthly & Annual Converter
Free salary calculator — instantly convert your pay between annual, monthly, biweekly, weekly, daily, and hourly. See how much $25/hr is per year. No sign-up needed.
Inflation Calculator - Measure Buying Power Over Time
See how inflation changes the value of money over time and compare past amounts with today’s purchasing power.
Sales Tax & VAT Calculator — Add or Remove Tax
Add sales tax or VAT to a net price, or remove it from a tax-inclusive total. Works with any rate and currency.
Currency Converter — Live & Manual Rates
Convert 19 major currencies with daily reference rates, or switch to manual and use the exact rate your bank quoted.
Emergency Fund Calculator
Work out how much cash to keep for a safety net and how long it will take to save it.
Savings Goal Calculator
Find the monthly amount needed to reach a savings target by a chosen date.
Debt Payoff Calculator
See how long a balance will take to clear and how much interest you will pay.
Extra Mortgage Payment Calculator
See how much interest and time an extra monthly payment can save.
Loan Affordability Calculator
Estimate a sensible borrowing range from income, existing debts and current rates.
Net Worth Calculator
Add up assets and liabilities to see your financial position in one number.
50/30/20 Budget Calculator
Split take-home income into needs, wants and savings with the 50/30/20 rule.
4% Rule Retirement Calculator
Estimate sustainable retirement income from a portfolio using the 4% rule.
Freelance hourly rate
Find the hourly rate that covers costs, tax and the income you want to keep.
Rent vs buy
Compare the net cost of renting with owning over a chosen holding period.
FIRE number
Estimate the portfolio needed for financial independence.
Home affordability
Set a home price range from income, debts and a down payment.
Investment fee impact
See how an annual fee reduces a portfolio over time.
Minimum payment payoff
Measure how long a credit card balance lasts at the minimum payment.
Mortgage refinance break-even
Find how many months of lower payments are needed to recover refinancing costs.
Retirement withdrawal
Estimate sustainable monthly income from a retirement portfolio.
Auto loan affordability
Turn a comfortable monthly car payment into a realistic purchase price.
Credit utilization
See how much of your available credit you are using and what it would take to reach a target.
Debt avalanche
Model paying the highest-interest debt first while keeping minimums on the rest.
Debt payoff date
Find the calendar month a balance will be cleared at your current payment.
Debt snowball
Clear the smallest balance first and measure how fast the momentum builds.
Debt-to-income ratio
Measure monthly debt payments against gross income using the ratio lenders commonly review.
Dollar-cost averaging
Average the cost of buying a fixed dollar amount at three different prices.
Down payment goal
Work out the monthly saving needed to hit a home deposit target.
Early loan payoff
Measure the interest and months saved by adding to a fixed loan payment.
Future value
Project what a lump sum grows to at a fixed rate and compounding frequency.
Hourly to salary
Convert an hourly wage into annual, monthly and weekly gross pay.
Inflation-adjusted salary
Find the raise needed to keep your salary level with rising prices.
Loan comparison
Compare two loan offers on monthly payment and total cost including fees.
Monthly cash flow
Add up monthly income and outgoings to see what is left over.
Overtime pay
Calculate extra pay from overtime hours at a chosen multiplier.
Pay raise
See the new salary and percentage change from a raise.
Personal loan payment
Estimate the monthly instalment and total cost of a personal loan.
Salary to hourly
Convert an annual salary into an equivalent hourly wage.
Sales tax inclusive
Split a tax-inclusive total into the pre-tax price and the sales tax.
Savings interest
Estimate interest earned on a deposit over a chosen term.
Savings rate
Measure the share of income you save or use to repay debt.
Sinking fund
Set aside a steady monthly amount for a known future bill.
Stacked discount
Combine percentage discounts and a fixed coupon into one final price.
Student loan repayment
Estimate the monthly payment and total interest on a student loan.
Subscription audit
Add up recurring subscriptions and project their cost over several years.
Unit price comparison
Compare two package sizes and find the cheaper price per unit.
VAT reverse
Remove VAT from a gross amount to recover the net price.
Vacation savings goal
Plan the monthly saving needed for a trip by a chosen month count.
Zero-based budget
Give every unit of monthly income a job and see what is left unassigned.
Loan Calculator - Calculate Monthly Payment, Interest and Total Cost
See monthly loan payments, total interest, and total repayment for personal, student, or other loans with a quick online calculator.
Auto Loan Calculator - Estimate Car Payment, Interest and Taxes
Calculate your monthly car payment, total interest, sales tax, and trade-in impact before financing a new or used vehicle.
Investment Calculator - Estimate Future Value and Investment Growth
Project investment growth with contributions, return rate, and compounding to see future value and long-term wealth potential.
Retirement Calculator - Estimate How Much You Need to Retire
Plan retirement savings, future income needs, and monthly contributions with a calculator built for long-term retirement goals.
Compound Interest Calculator — See How Your Money Grows Over Time
Free compound interest calculator with daily, monthly, and yearly compounding. See future value, total earnings, and growth chart for any investment.
Simple Interest Calculator — Calculate Interest on Loans & Savings
Free simple interest calculator to instantly find the interest amount, total maturity value, and principal. Supports months and years for fast calculation.
Discount Calculator — Sale Price After X% Off (With Tax)
Enter original price and discount % → instantly see the sale price, savings amount, and final total after tax. Supports coupons, bulk quantities, and multiple discounts.
Marginal tax bracket
See how tax applies to the next slice of income at your marginal rate.
Perpetuity value
Value an endless stream of payments, with or without growth.
APR vs interest rate
Compare the quoted interest rate with the true annual cost after fees.
Adjustable-rate mortgage
See how an adjustable-rate mortgage payment changes when the fixed period ends.
Annuity payout
Turn a lump sum into a steady income stream for a set number of years.
Car lease vs buy
Compare the cash cost of leasing a car with buying and reselling it.
Closing costs
Estimate the fees and taxes due when a property purchase closes.
Interest-only mortgage
Compare the interest-only payment with the higher payment after principal repayment starts.
Loan prepayment penalty
Check whether repaying a loan early still saves money after the penalty.
Lump sum vs DCA
Compare investing a lump sum now with spreading purchases over several months.
PMI cost
Estimate mortgage insurance premiums and when the policy can be removed.
Severance pay
Turn a severance package and savings into a monthly runway estimate.
Wedding budget
Split a wedding budget between catering, venue and a contingency reserve.
Biweekly mortgage
See how paying half a mortgage payment every two weeks shortens the loan.
Bulk buy comparison
Check whether a lower bulk unit price still saves money after storage and waste.
Commission pay
Estimate tiered commission earnings from sales and a quota.
Compound annual growth rate
Measure the smoothed annual growth rate between two values.
Currency conversion fee
Price the spread and fees hidden in a currency conversion.
Dividend yield
Calculate the income return on a share price and the yield on your cost.
Education fund
Work out the monthly saving needed for future tuition costs.
Expense ratio cost
Convert a fund expense ratio into an annual fee and a long-term cost.
Present value
Discount a future amount back to what it is worth today.
Property tax
Estimate annual and monthly property tax from value and local rates.
Rule of 72
Estimate how many years an investment takes to double at a fixed annual return.
Frequently asked questions
What are the best free financial calculators?
NumberPrism offers a wide range of free financial tools including Mortgage, Loan, Investment, and Retirement calculators.
How accurate are online loan calculators?
Our calculators use standard financial formulas to provide highly accurate estimates for monthly payments and interest costs.
Can I use these calculators for business planning?
Yes, tools like ROI, Margin, and Loan calculators are perfect for small business financial planning.