Finance Calculators
Plan your budget better using our loan calculator, EMI calculator, and compound interest calculator. Whether it's daily expenses or long-term savings, Vast Calculators brings clarity to your financial decisions.
About Our Finance Calculators
The loan, EMI, and mortgage tools all use the standard amortization formula — the same math the CFPB describes for how lenders compute monthly payments. Compound-interest and savings tools use the textbook compound-growth equations you'll find behind the SEC's own Investor.gov calculators. Each page shows the formula, a worked example with real numbers, and a reference table you can sanity-check offers against.
What these tools can't know: your credit-based rate, lender fees, taxes, or insurance. That's why a bank's quote will differ from a clean formula result — ours tells you the mathematical core of the deal so you can spot how much of the quote is rate and how much is extras. Estimates here are education, not financial advice.
All 37 Finance Calculators
- 401(k) Calculator Projects your 401(k) balance at retirement and splits it into your own contributions, the employer match, and investment…
- AED to USD Converter Enter an amount in UAE dirhams and this returns the US dollar equivalent, along with the rate applied and the date that …
- Auto Loan Calculator This works out the monthly payment on a car loan and the total interest you pay across the term. Gather six figures firs…
- Break Even Calculator This works out how many units you must sell before a product or a business stops losing money. You need three numbers: t…
- CD Calculator A certificate of deposit pays a fixed yield for a fixed term. Enter the deposit, the advertised APY and the term in mont…
- Compound Interest Calculator Projects what a starting principal plus regular deposits grows into over a term you set, compounding anywhere from annua…
- Credit Card Payoff Calculator Months to clear a card balance at your payment, or the payment that meets your deadline, plus the interest either way.
- Currency Converter Calculator Enter an amount, pick the currency you hold and the one you want, and this returns the converted figure, the unit rate a…
- Discount Calculator Takes an original price and a percent off and returns the amount due, with sales tax applied to the reduced price rather…
- EMI Calculator This calculates the equated monthly installment on a loan, the fixed amount you hand over every month until the debt is …
- Gas Cost Calculator This estimates what a drive costs in fuel, and what each passenger owes if you split it. Choose your unit system first, …
- Home Affordability Calculator Turns income, monthly debts, savings and a mortgage rate into the home price the 28/36 rule supports, and names which of…
- Home Equity Calculator This separates two numbers that are often confused: the equity you own in your home, and the smaller sum a lender will a…
- Inflation Calculator Move a sum forward or backward through the years at an inflation rate you set, and see what today's money must become — …
- Investment Calculator Projects a lump sum plus monthly contributions at an assumed annual return, split into the money you paid in and the gro…
- Loan Calculator Works out the installment on a fixed-rate loan after your down payment, for monthly, quarterly, semi-annual, or annual r…
- Loan Repayment Calculator This turns a loan into the three numbers that decide whether you can carry it: the fixed monthly repayment, the total yo…
- Margin Calculator Turns a unit cost and a selling price into the profit margin, or a cost and a target margin into the price that reaches …
- Mortgage Calculator This estimates the full monthly cost of owning a home rather than the loan payment alone. Enter the home price and your …
- Overtime Pay Calculator This calculates gross weekly pay when some of the hours are paid at a premium rate. You need your regular hourly rate, t…
- Personal Loan Calculator Prices an unsecured personal loan: the monthly payment, the total interest, and what actually reaches your account once …
- Prorated Rent Calculator This works out the rent owed for a partial month when a tenancy starts or ends part way through. Choose whether you are …
- Refinance Calculator Tests whether a mortgage refinance pays: the new monthly payment, the saving against your current one, and the months ne…
- Retirement Calculator Projects the balance your savings reach by your target retirement age, then converts it into the yearly income a 4% with…
- RMB to USD Converter Enter an amount in Chinese yuan and this returns the US dollar equivalent, together with the rate applied and the date i…
- RMD Calculator Divides last December 31's retirement account balance by the IRS Uniform Lifetime Table denominator for your age to give…
- ROI Calculator Turns money in, money back and any attached costs into a return percentage — the third field is there so fees, commissio…
- Roth IRA Calculator Projects the balance a Roth IRA reaches by retirement and splits it into what you contributed and the growth qualified w…
- Salary Calculator Convert hourly pay to an annual salary and back, with monthly, biweekly, weekly and daily equivalents at your own weekly…
- Sales Tax Calculator Adds sales tax to a price or backs it out of a tax-inclusive total. Enter the amount and your combined state-plus-local …
- Savings Calculator Projects what a starting balance plus a monthly deposit is worth after a set number of years: the ending balance, the in…
- Student Loan Calculator Your student loan's monthly payment and lifetime interest on the standard plan — 10 to 25 years — with the extra-payment…
- Tip Calculator Works out the tip, the sales tax, the final total and each person's share from one check. Enter the pre-tax subtotal, th…
- TSP Calculator Project your Thrift Savings Plan balance to retirement: contributions, the 5% agency match (1% automatic + 4% matching),…
- Uber Fare Calculator Estimate a rideshare fare from your city's rate card — base, per-mile, per-minute, booking fee, and surge — with the far…
- USD to JPY Converter Convert US Dollars to Japanese Yen with live rates. Learn why the yen has no decimal cents, how USD/JPY moves as a free-…
- VAT Calculator Work out VAT-inclusive and VAT-exclusive prices at any rate — add VAT to a net price or back it out of a gross figure in…
Where Most People Start
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Loan Calculator
Monthly payment for any amount, rate, and term — with a per-$10,000 cheat sheet.
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Mortgage Calculator
P&I plus taxes, insurance, and HOA — the real monthly number.
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Compound Interest Calculator
See what rate, time, and contributions actually do to a balance.
Finance Calculators — FAQs
Why does my bank's quote differ from the calculator?
The calculator returns the pure amortization math for the rate and term you enter. Lenders add origination fees, credit-based rate adjustments, escrow for taxes and insurance, and sometimes different day-count conventions. If the gap is large, ask the lender to break out which add-ons cause it — the base math should match ours.
Are these results financial advice?
No — they're mathematical estimates for education and planning. Rates, fees, and eligibility vary by person and lender. For decisions like a mortgage or large investment, confirm the numbers with a qualified financial adviser.
Which formulas do the finance tools use?
Standard industry math: the amortization payment formula for loans/EMI/mortgages, compound growth A = P(1 + r/n)^nt for interest and savings, and simple ratio math for ROI and break-even. Every calculator page lists its formula and cites a source such as the CFPB, SEC Investor.gov, or the Federal Reserve.