Smart Calculators & Tools

Retirement Withdrawal Calculator: How Long Will Your Savings Last?

Estimate how long your retirement savings will last with our free, browser‑based calculator. Input withdrawals, inflation, returns, and more.

PTO Accrual Calculator (Paid Time Off, US)

Project your paid time off balance with this precise accrual calculator. Easily model your policy, track your remaining hours, and plan your time off.

Mortgage Extra Payment Calculator: See How Much Interest and Time You Save

See how extra principal payments reduce interest and shorten your mortgage term. Use our calculator to compare schedules and view your potential savings.

Gallons to Liters Converter - US Gallon to Liter Calculator

Instantly convert US liquid gallons to liters and vice versa with our precise calculator. Get exact conversion factors and a helpful reference chart.

Stair Calculator: Rise, Run, Riser Height & Stringer Length

Instantly calculate stair rise, run, riser height, and stringer length. Enter floor-to-floor rise and max riser for accurate counts and code compliance.

Time Zone Difference Calculator: Time Difference Between Cities (US)

Easily convert time between U.S. cities, view UTC offsets, daylight saving status, and find overlapping business hours for any date. Free and accurate.

Take-Home Pay Calculator (US): Salary to Net Pay

Enter your salary or hourly rate, filing status, deductions and state to instantly see your net take‑home pay per paycheck, month, and year.

Age Calculator: Exact Age in Years, Months and Days (US)

Find your exact age in years, months, days, total days, weeks, next birthday countdown, birth weekday, and age differences. Free instant results.

Fahrenheit to Celsius Converter - F to C Calculator

Instantly convert Fahrenheit to Celsius with exact arithmetic, view the formula, and get Kelvin values. No sign‑up, no rounding until the final step.

Home Affordability Calculator: How Much House Can You Afford?

Calculate how much house you can afford in the United States based on your income, debts, and loan terms. Get accurate housing budget estimates today.

Dividend Yield Calculator: Yield, Yield on Cost and Dividend Income

Instantly calculate dividend yield, yield on cost, dividend income, and payout ratio. Input share price, dividends, and optional cost basis for U.S. stocks.

Roof Pitch Calculator: Pitch, Angle in Degrees and Slope Percent

Instantly convert roof pitch (x:12) to angle in degrees and slope percent. Add span to compute rafter length, area multiplier, and roof area.