Finance Calculators: Savings, Interest, Tax and Markup
Explore savings growth, compare markup with margin, or estimate income tax. Each tool asks for the inputs relevant to that calculation and explains its assumptions alongside the result.
- Compound Interest CalculatorGrowth of a balance with compounding and monthly contributions, year by year.
- Tax Calculator2026 federal income tax by bracket, with effective and marginal rates.
- Tax Refund CalculatorEstimate your 2026 refund or amount owed from income, withholding, and dependents.
- Savings CalculatorGrowth of a starting balance plus monthly deposits at a given APY, or the deposit needed to hit a goal.
- Markup CalculatorSelling price, profit, markup percent, and gross margin from a cost.
Choose a calculator for your money question
- Plan deposits toward a savings goal
- Savings Calculator. Enter a starting balance, APY and time period to project a balance, or switch to goal mode to find the monthly deposit for a target. Results depend on the rate you enter.
- Compare compounding schedules
- Compound Interest Calculator. Choose a compounding frequency and monthly contribution to see a year-by-year balance. Use this tool when you want to change the compounding assumption explicitly.
- Compare selling price, markup and margin
- Markup Calculator. Start with cost and enter a markup, selling price or target margin. The result separates profit as a share of cost from profit as a share of selling price.
Common questions
Should I use the tax calculator or the tax refund calculator?
Use the tax calculator to explore estimated federal income tax and tax brackets. Use the refund calculator when you also want to enter withholding and compare it with estimated tax owed.
Does a savings projection guarantee that balance?
No. The savings and compound interest tools model the rates, deposits and time period you supply. They do not predict future rates, and their balances do not account for every real-world fee or tax.
Continue with a related calculation
- Paycheck and Salary Calculators for 2026. Compare gross earnings with estimated take-home pay.
- Everyday Calculators: Tips, Discounts, Age and Area. Work out a sale price, tip or shared bill.