A financial calculator turns a money question into an exact number: your mortgage payment, when a debt will be paid off, what your savings grow into, or the tax on your pay. This hub groups every finance calculator on the site by the decision you are making, so the right tool is one click away.
Quick answer
- What it is
- 96 free financial calculators for mortgages, loans, debt, pay and tax, saving, investing and business.
- Best for
- Checking a payment, a cost or a return before you sign, borrow or invest.
- How to start
- Pick the topic that matches your decision below, or open one of the most-used tools.
- Cost
- Free. No account or email, and every calculation runs in your browser.
Most used: Loan Mortgage Home affordability Compound interest ROI Inflation
Which Finance Calculator Do I Need?
Pick your goal and jump straight to the right tool.
- Buying a home - set a price range with the home affordability calculator, then get the full monthly cost with the mortgage payment calculator.
- Borrowing - compare offers with the loan calculator and the true yearly cost with the APR calculator.
- Paying off debt - build a plan with the debt snowball calculator or see if one loan is cheaper with the debt consolidation calculator.
- Pay and tax - convert your pay with the salary calculator and estimate tax with the self-employment tax or Canadian income tax calculators.
- Budgeting - split your income with the 50/30/20 budget calculator.
- Saving - see growth with the compound interest calculator and set a target with the savings goal calculator.
- Investing - measure a return with the ROI calculator or CAGR calculator.
- Running a business - price with the margin calculator and find the break-even point.
Mortgage and Home
16 toolsWhat a home really costs: price you can afford, monthly payment, refinancing and paying off early.
Loans and Credit
13 toolsMonthly payments, true borrowing cost and interest for personal, car and student loans.
Also: Loan Payment Calculator · APR vs APY
Debt Payoff
8 toolsPlan your way out of credit card and loan balances, and check where lenders see you.
Income, Pay and Tax
16 toolsConvert pay between periods, compare salaries and estimate the tax on what you earn and spend.
Budgeting
7 toolsSplit your income, track spending and see your net worth in one number.
See every budgeting calculator
Saving and Retirement
9 toolsGrow savings with compound interest, build a safety net and plan retirement income.
Also: Money Market Calculator
Investing and Trading
13 toolsMeasure returns, value cash flows, account for inflation and size trades.
See every investing calculator
Business and Startups
14 toolsPrice, cost and plan a business: margins, break-even, runway and equity.
Marketing ROI
5 toolsTurn ad and traffic numbers into rates, costs and return.
Everyday Savings
7 toolsSmall numbers that add up: discounts, cashback, tips and daily habits.
See every everyday savings calculator
How to Get the Most From These Calculators
Guessing at money numbers is expensive, and seeing the real figure often changes the decision. Each calculator here uses the standard formula for its task, shows the working next to the answer, and runs privately in your browser. Start with the topic that matches your decision, or open a topic page to see every related tool.
Start With the Big Three
For most households the highest-impact numbers are housing, debt and savings rate. If you are buying, set a realistic price range before you look at homes. If you carry balances, check your debt-to-income ratio and payoff dates. To build savings, pick a framework such as the 50/30/20 budget and automate the savings share.
Worked Example: Can I Afford This Home?
- Set the limit. On a gross income of $120,000 a year ($10,000 a month), the common 28 percent guideline allows about $2,800 a month for housing. The home affordability calculator applies this with your debts.
- Price the loan. A $300,000 mortgage at 6.5 percent over 30 years costs $1,896.20 a month in principal and interest, or $382,633 in total interest. Add tax and insurance in the mortgage payment calculator.
- Compare the term. The same loan over 15 years at 6.0 percent is $2,531.57 a month but only $155,683 in interest, about $227,000 less. The 15 vs 30-year mortgage calculator shows the trade-off.
Estimates, Not Advice
Results are only as accurate as the figures you enter. Rates, taxes and fees vary by lender and location, and no calculator knows your full situation, so treat every result as a planning estimate and confirm important numbers with a qualified professional.
Key Finance Terms
- APR
- The yearly cost of borrowing, including interest and most fees, shown as a percentage.
- APY
- The yearly return on savings once compounding is included; 12 percent compounded monthly is an APY of 12.68 percent.
- Principal
- The original amount borrowed or invested, before any interest.
- Amortization
- Paying off a loan in equal instalments, where early payments are mostly interest and later ones mostly principal.
- Compound interest
- Interest earned on both your money and the interest it has already earned.
- Debt-to-income ratio (DTI)
- Monthly debt payments divided by gross monthly income; lenders often look for 36 percent or less.
- PMI
- Private mortgage insurance, usually charged on a conventional loan when the down payment is under 20 percent.
- Equity
- The share of an asset you own outright: its value minus what you still owe.
- CAGR
- Compound annual growth rate: the steady yearly rate that turns a starting value into an ending value.
- Net present value (NPV)
- Future cash flows discounted to today's money, minus the cost; a positive NPV adds value.
- Inflation
- The rise in prices over time, which lowers what each unit of money can buy.
- Break-even point
- The sales volume at which revenue exactly covers fixed and variable costs.
Explore Other Calculators
Beyond finance, browse the rest of the site.
- Converters - units, measures and everyday conversions.
- Math Calculators - percentages, algebra, geometry and more.
- Health Calculators - BMI, calories and body metrics.
- Date and Time Calculators - dates, ages and durations.
- AI and Crypto Calculators - crypto profit, staking and AI cost tools.
Frequently Asked Questions
What is a financial calculator?
A financial calculator is a tool that applies a standard money formula, such as a loan payment, compound interest or net present value, to your own figures and returns an exact result.
How much house can I afford?
A common guideline keeps housing costs at or below 28 percent of gross monthly income and all debt payments at or below 36 percent. On $10,000 a month that is about $2,800 for housing.
How is a monthly mortgage payment calculated?
Principal and interest use the amortization formula M = P x r(1+r)^n / ((1+r)^n - 1), with r the monthly rate and n the number of payments. $300,000 at 6.5 percent for 30 years is $1,896.20 a month.
What is the difference between APR and APY?
APR is the yearly borrowing cost including fees, without compounding; APY is the yearly return with compounding included. The same 12 percent rate compounded monthly is an APY of 12.68 percent.
Is the debt snowball or avalanche method better?
The avalanche method, paying the highest rate first, saves the most interest. The snowball method, paying the smallest balance first, gives quicker wins that help many people stay on track.
What is a good debt-to-income ratio?
Many lenders look for a DTI of 36 percent or less, and many mortgage programmes set an upper limit around 43 percent.
How does compound interest work?
Each period, interest is added to the balance and then earns interest itself. $10,000 at 7 percent compounded yearly grows to $19,671.51 in 10 years.
How much should I keep in an emergency fund?
A common target is three to six months of essential expenses, more if your income is irregular.
What is the 50/30/20 budget rule?
It splits after-tax income into 50 percent for needs, 30 percent for wants and 20 percent for saving and paying down debt.
How do I calculate return on investment?
ROI is (final value - cost) / cost x 100. Buying for $1,000 and ending with $1,250 is a 25 percent return; the ROI calculator also annualizes it.
What is the rule of 72?
Divide 72 by the yearly return to estimate how many years money takes to double. At 8 percent that is about 9 years.
Are these results financial advice?
No. They are estimates from standard formulas and the figures you enter. Confirm important decisions with a qualified, licensed professional.
Reviewed by Prof. Dr. Khalil Mudassar, PhD
Formulas and methods on this page are checked for accuracy against standard references. About the reviewer
The calculators on this page are provided for general information and planning only and do not constitute financial, tax, investment or legal advice. Results are estimates based on the figures you enter. Always confirm important decisions with a qualified, licensed professional.