Percentage calculator
Calculate percentages online, including percent of a number, percentage increase, and percentage decrease.
Project your 401(k) balance at retirement with employer match, salary raises, and 2026 IRS contribution limits. Year-by-year growth table.
Project your 401(k) balance at retirement from your salary, contribution rate, employer match, and expected return.
401(k) calculator is a free online tool on ReallyUseful.Tools. No account is required.
401(k) calculator is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
Calculate percentages online, including percent of a number, percentage increase, and percentage decrease.
Calculate exact age from date of birth in years, months, days, and more with a simple online age calculator.
Calculate your BMI online using height and weight. Get body mass index results with metric and imperial units.
Estimate monthly mortgage payments with loan amount, interest rate, term, deposit, taxes, and fees.
Calculate loan payments, total interest, and repayment schedules for personal loans and other borrowing.