Plan your golden years with confidence — estimate Social Security benefits, calculate retirement income, track net worth, plan estates, and manage health metrics. All free and private.
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Convert between px, rem, em, pt, and other CSS units
Use tool →Calculate percentages, increases, decreases, and changes
Use tool →Calculate Certificate of Deposit returns with compound interest and compare CD laddering strategies
Use tool →Calculate compound interest with contributions and visual growth chart
Use tool →Estimate federal and state estate tax on an inheritance
Use tool →Estimate US federal income tax with brackets, FICA, and take-home pay
Use tool →Calculate your total net worth from assets minus liabilities
Use tool →Calculate your total net worth by listing assets and liabilities
Use tool →Calculate sales tax for any US state with multi-item and reverse modes
Use tool →Track and categorize blood pressure readings with averages, trends, and health risk indicators
Use tool →Calculate your Body Mass Index with visual BMI scale
Use tool →Project your 401(k) retirement savings with employer matching, catch-up contributions, and growth analysis
Use tool →Calculate annuity growth and payout projections for accumulation and distribution phases
Use tool →Calculate your Financial Independence, Retire Early (FIRE) number with Lean, Regular, and Fat FIRE variants, savings projections, and milestone timeline
Use tool →Estimate retirement savings, income, and how much to save monthly
Use tool →Analyze Roth IRA conversion strategies with break-even year calculation, tax impact analysis, and optimal conversion amount recommendations
Use tool →Estimate your Social Security retirement benefits based on earnings history and claiming age
Use tool →Estimate annual property taxes by entering your home value, assessment ratio, and local mill rate.
Use tool →Learn how to calculate your monthly mortgage payment with the amortization formula. Includes examples, tips for getting lower rates, and a free calculator.
Read guide →Learn how to calculate your Body Mass Index (BMI) with the simple formula. Understand what your BMI means, its limitations, and when to use other health metrics.
Read guide →Understand compound interest and how it makes your money grow exponentially. Learn the formula, see real examples, and discover strategies to maximize compound growth.
Read guide →Learn how to calculate your Total Daily Energy Expenditure (TDEE) and create a calorie deficit for healthy weight loss. Includes formulas, activity multipliers, and a free calculator.
Read guide →NexTool provides free tools for seniors including Social Security benefit estimators, retirement income calculators, net worth trackers, estate tax calculators, annuity calculators, CD rate calculators, Roth IRA conversion calculators, BMI calculators, and blood pressure trackers.
Yes. Our Social Security calculator estimates your monthly benefit based on earnings and retirement age. See how delaying benefits to age 67 or 70 increases your monthly payment.
Completely. All calculations run in your browser. No personal or financial data is ever sent to any server, stored in any database, or shared with anyone. Your privacy is fully protected.
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