Financial Calculators
Mortgages, loans, retirement, investing, and taxes — model the numbers before you commit to them.
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Overview
Most financial decisions are really just compound interest wearing a different outfit — a mortgage, a car loan, a 401(k) projection, and a credit-card payoff schedule are all the same underlying math applied to a different situation. This category collects calculators for the decisions that come up again and again: how much house you can afford, whether to refinance, how extra payments shorten a loan, what a retirement account could grow to, and what a given tax bracket actually costs you. Each one runs the same formula a bank, advisor, or spreadsheet would use — the value is in not having to build that spreadsheet yourself every time.
All Financial Calculators
401K Calculator
Project your 401(k) balance at retirement based on your…
403(b) Retirement Calculator
Project your 403(b) balance at retirement, including any…
50/30/20 Budget Calculator
Split your take-home pay into needs, wants, and savings…
529 College Savings Calculator
Project how a 529 college savings plan grows with regular…
Amortization Calculator
Generate a full month-by-month amortization schedule for…
Annuity Calculator
Work out the present value or future value of a stream of…
Annuity Payout Calculator
Find out how much you can withdraw from a lump sum on a…
APR Calculator
Calculate the true Annual Percentage Rate of a loan by…
APY Calculator
Convert a nominal interest rate into its Annual…
Auto Lease Calculator
Calculate your monthly car lease payment from MSRP…
Auto Loan Calculator
Work out your monthly car payment and true total cost by…
Average Return Calculator
Calculate the arithmetic mean, geometric mean (CAGR)…
Boat Loan Calculator
Calculate your monthly boat loan payment and estimate…
Bond Calculator
Calculate a bond's yield to maturity, current yield, and…
Break-Even Calculator
Find how many units you need to sell before a business…
Budget Calculator
Build a monthly budget across common expense categories…
Business Loan Calculator
Calculate the monthly payment, total interest, effective…
CAGR Calculator
Calculate the compound annual growth rate between a…
Canadian Mortgage Calculator
Calculate Canadian mortgage payments using semi-annual…
Cash Back or Low Interest Calculator
Compare a dealer cash-back rebate against a low-interest…
CD Calculator
Estimate the maturity value and total interest earned on…
College Cost Calculator
Project the total future cost of college after accounting…
Commission Calculator
Calculate sales commission earnings using either a flat…
Compound Interest Calculator
Calculate how a lump sum (plus optional monthly…
Credit Card Calculator
See exactly how many months it will take to pay off a…
Credit Card Payoff Calculator
Compare the Avalanche and Snowball payoff strategies…
Crore to Lakh Calculator
Convert a value in crore to the equivalent in lakh, using…
Crore to Million Calculator
Convert a value in crore to the equivalent in million.
Currency Calculator
Convert an amount between major world currencies using…
Debt Avalanche Calculator
Simulate paying off multiple debts…
Debt Consolidation Calculator
Compare what you would pay by continuing your current…
Debt Payoff Calculator
Find out how many months it will take to pay off a single…
Debt Snowball Calculator
Simulate paying off multiple debts…
Debt-to-Income Ratio Calculator
Calculate your front-end and back-end debt-to-income…
Debt-to-Income Ratio Calculator
Calculate your debt-to-income ratio, a figure lenders use…
Depreciation Calculator
Calculate annual asset depreciation using Straight-Line…
Discount Calculator
Calculate the final price after one or two stacked…
Dividend Yield Calculator
Calculate a stock's dividend yield from its annual…
Down Payment Calculator
See how much you need to save for a home down payment at…
Emergency Fund Calculator
Find your emergency fund target based on essential…
Estate Tax Calculator
Estimate potential federal estate tax on an estate above…
FHA Loan Calculator
Calculate your FHA loan payment including upfront and…
Finance Calculator
Solve any one of the five core time-value-of-money…
FIRE Calculator
Calculate your Financial Independence, Retire Early…
Future Value Calculator
Calculate how much a lump sum plus optional periodic…
GDP Calculator
Calculate Gross Domestic Product using the standard…
HELOC Calculator
Calculate your Home Equity Line of Credit payments for…
Home Equity Loan Calculator
Calculate how much you can borrow against your home's…
House Affordability Calculator
Find the maximum home price you can afford based on your…
Income Tax Calculator
Estimate your US federal income tax using illustrative…
Inflation Calculator
Find out how much a sum of money will be worth in the…
Interest Calculator
Compare simple interest against compound interest at any…
Interest Rate Calculator
Work backward from a loan amount, monthly payment, and…
Investment Calculator
Project the future value of an initial investment plus…
IRR Calculator
Calculate the Internal Rate of Return for a series of…
Lease Calculator
Calculate the monthly payment for leasing any asset — v…
Loan Calculator
Work out the monthly payment, total interest, and full…
Margin Calculator
Calculate gross margin percentage, markup percentage…
Marriage Tax Calculator
Compare the combined federal income tax two people would…
Million to Billion Calculator
Convert a value in million to the equivalent in billion.
Million to Lakh Calculator
Convert a value in million to the equivalent in lakh.
Million to Thousand Calculator
Convert a value in million to the equivalent in thousand.
Mortgage Amortization Calculator
Generate a full year-by-year mortgage amortization…
Mortgage Calculator
Estimate your total monthly mortgage payment — principal…
Mortgage Payoff Calculator
See how making extra monthly or one-time payments toward…
Mutual Fund Calculator
Project how a lump-sum investment plus monthly SIP…
Net Worth Calculator
Calculate your net worth by subtracting total liabilities…
NPV Calculator
Calculate the Net Present Value of an investment from its…
Payback Period Calculator
Calculate the simple and discounted payback period for an…
Payment Calculator
Find the exact monthly payment on any loan from its…
Pension Calculator
Project your annual and monthly defined-benefit pension…
Percent Off Calculator
Calculate the final price after any percentage discount…
Personal Loan Calculator
Compare personal loan offers side by side, factoring in…
Present Value Calculator
Determine the current worth of a future lump sum, a…
Real Estate Investment Calculator
Analyze the profitability of a rental property purchase…
Refinance Calculator
Compare your current mortgage payment against a new…
Rent Calculator
Work out how much rent fits your budget using the…
Rent vs. Buy Calculator
Compare the true long-term cost of renting versus buying…
Rental Property Calculator
Analyze a rental property's cash flow, cap rate…
Repayment Calculator
Generate a full year-by-year repayment schedule for any…
Retirement Calculator
Project how your current savings and monthly…
RMD Calculator
Calculate your IRS Required Minimum Distribution from a…
ROI Calculator
Calculate return on investment and annualized ROI (CAGR)…
Roth IRA Calculator
Project how your Roth IRA balance grows tax-free to…
Rule of 72 Calculator
Estimate how many years it takes an investment to double…
Salary Calculator
Convert a salary between hourly, daily, weekly, monthly…
Sales Tax Calculator
Add sales tax to a pre-tax price, or strip tax back out…
Savings Calculator
Project how an initial deposit plus regular monthly…
Simple Interest Calculator
Work out simple interest on a principal amount over any…
Social Security Calculator
Estimate your monthly Social Security benefit at early…
Stock Average (Cost Basis) Calculator
Calculate your average cost per share across multiple…
Stock Split Calculator
See how many shares you'll hold and what the new price…
Student Loan Calculator
Compare Standard, Extended, Graduated, and Income-Based…
Take-Home Pay Calculator
Estimate your net paycheck after federal income tax…
Tip Calculator
Calculate the tip amount, total bill, and cost per person…
Traditional IRA Calculator
Estimate your Traditional IRA balance at retirement, the…
UK Mortgage Calculator
Calculate UK mortgage repayments, Loan-to-Value ratio…
Unit Price Calculator
Compare two products by price per unit to find the better…
VA Mortgage Calculator
Calculate a VA home loan payment including the VA funding…
VAT Calculator
Add or remove Value Added Tax from any price, and…
Zakat Calculator
Calculate zakat owed at 2.5% of net zakatable wealth…
How to Choose the Right Tool
Match the calculator to the decision stage you're at. Early-stage ('can I afford this?') questions point to affordability and payment calculators. Mid-decision ('which option is cheaper?') questions point to comparison-style tools like refinance or lease-vs-buy calculators. Long-horizon planning ('where will this be in 20 years?') points to retirement, investment, and compound-interest calculators. If you're working through a full financial decision rather than a single number, our calculator guides chain the right tools together in order.
At a Glance
| Calculator | Answers | Time horizon |
|---|---|---|
| Mortgage / House Affordability | "What will my monthly payment be, and can I afford it?" | Immediate + loan term |
| Loan / Auto Loan / Personal Loan | "What will this loan cost me in payments and total interest?" | Loan term |
| Refinance / Mortgage Payoff | "Is it worth changing my existing loan terms?" | Remaining loan term |
| Retirement / 401k / Roth IRA | "Will I have enough, and how much should I contribute?" | Years to decades |
| Investment / Compound Interest | "How does my money grow if I leave it invested?" | Years to decades |
| Income Tax / Sales Tax / VAT | "What do I actually owe or take home?" | Immediate |
Common Mistakes to Avoid
- Ignoring property tax, insurance, and PMI when estimating a mortgage payment — the principal-and-interest number alone is usually 20-30% lower than the real monthly cost.
- Comparing loan offers by monthly payment alone instead of total interest paid — a longer term almost always lowers the payment while raising the total cost.
- Forgetting that extra payments only save the interest they're projected to save if a lender actually applies them to principal — always confirm with your servicer.
- Running a retirement projection with a single fixed growth rate for 30 years — real markets don't move in a straight line, so treat the result as a planning estimate, not a guarantee.
Frequently Asked Questions
How accurate are these financial calculators?
They use the same standard formulas (amortization, compound interest, present/future value) used across the lending and finance industry, and are tested against reference calculations before publishing. They won't match a lender's exact quote — which adds fees, points, and underwriting specifics — but they're accurate for planning and comparison.
Do I need an account to use these?
No — every calculator works instantly with no sign-up.
Can I trust these calculators for a major decision like buying a home?
Use them to understand the shape of the decision and compare scenarios, then confirm the exact numbers with a lender or licensed financial advisor before committing — see our Disclaimer for the full explanation.
Why is my real loan quote different from the calculator result?
Lenders factor in discount points, origination fees, your credit profile, and rounding conventions that a general-purpose calculator can't know in advance. Use the calculator to compare scenarios, then get a formal quote for the real number.
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