Finance Calculators

Mortgage payment, compound interest, tip calculator, percentage tools, income calculators and business pricing - all free, instant and private.

Loan & Mortgage

Mortgage payment, loan amortization, refinance savings and auto loan calculators

Mortgage Payment CalculatorLoan Amortization Calculator
Investment & Savings

Compound interest, savings goal, ROI, retirement savings and rule of 72 calculators

Compound Interest CalculatorSavings Goal Calculator
Income & Tax

Paycheck estimator, hourly to salary, overtime pay and freelance rate calculators

Paycheck CalculatorHourly to Salary Calculator
Tip & Bill Split

Tip calculator, bill splitter, group dining and tip by service type

Tip CalculatorBill Splitter
Percentage

Percentage calculator, percentage change, markup vs margin and discount calculator

Percentage CalculatorPercentage Change Calculator
Business & Pricing

Break-even analysis, profit margin, unit economics and pricing calculators

Break-Even CalculatorProfit Margin Calculator

Need to figure out how much your monthly mortgage payment will be on a $350,000 home, how long it takes to double your money at 7% interest, what a 20% tip on a $85 dinner comes to, or what markup percentage gives you a 30% profit margin? These finance calculators cover the everyday math that matters most - from loan amortization and retirement savings projections to bill splitting, percentage calculations and break-even analysis. Every tool runs instantly in your browser with no sign-up, no ads and no data sent to any server.

Frequently asked questions

At 6.5% interest for 30 years, the monthly principal and interest payment on a $300,000 mortgage is approximately $1,896. Over the life of the loan you would pay about $382,633 in total interest. A 15-year term at the same rate would be $2,613/month but only $170,389 in total interest.

With annual compounding and no additional contributions, $10,000 at 7% grows to approximately $19,672 in 10 years. If you also contribute $200/month, it grows to about $53,879. The compound interest calculator shows the breakdown of contributions vs growth.

A 15% tip on $50 is $7.50, making the total $57.50. For comparison: 18% = $9.00 (total $59), 20% = $10.00 (total $60), 25% = $12.50 (total $62.50). The tip calculator also splits the bill per person.

Markup is the percentage added to cost (cost × markup% = profit), while margin is profit as a percentage of the selling price. A product that costs $60 and sells for $100 has a 66.7% markup but a 40% margin. Margin is always lower than markup for the same transaction.

Divide your annual salary by 2,080 (52 weeks × 40 hours). A $75,000 salary equals about $36.06/hour. For freelancers, factor in self-employment tax (15.3%), health insurance and unpaid time off - a $75,000 target income typically requires charging $55-65/hour.

Need other converters? Explore our metric converters, science & engineering, digital storage, time and date and cooking.