United States Financial Calculators
29 free calculators — updated for 2026
Mortgage Repayment
Calculate monthly mortgage repayments for any term and interest rate
Rental Yield
Calculate gross and net rental yield on an investment property
Buy vs Rent
Compare the long-term financial cost of buying versus renting
Mortgage Overpayment
See how extra mortgage payments reduce your interest and term
Federal Income Tax
US federal income tax with 2026 brackets and standard deduction
FICA
Social Security + Medicare payroll taxes (employee share)
Paycheck
Take-home pay per paycheck with federal tax + FICA + 401(k)
Self-Employment Tax
Schedule SE: 15.3% Social Security + Medicare on net earnings
US CGT
US federal CGT — long-term (0/15/20%) and short-term (ordinary)
Compound Interest
See how your savings or investments grow with compound interest
Savings Goal
Calculate how much you need to save each month to reach your goal
Lump Sum vs Regular
Compare investing a lump sum against regular monthly contributions
Inflation
See how inflation erodes the purchasing power of money over time
Emergency Fund
Calculate how large your emergency fund should be
HSA
HSA contribution limits and triple-tax-advantaged savings
Loan Repayment
Calculate monthly repayments on a personal loan
Car Loan
Calculate monthly payments for car finance
Credit Card Payoff
See how long it takes to pay off your credit card and total interest paid
Debt Payoff
Compare snowball vs avalanche strategies for paying off multiple debts
APR Comparison
Compare loan offers by their true annual percentage rate