Personal Finance

  • Social Security Spousal Benefit Calculator
    Estimate your US Social Security spousal benefit. Get 50% of the worker's PIA, reduced if you claim before your full retirement age (FRA).
  • Social Security COLA Increase Calculator (US)
    US Social Security COLA calculator: enter your current monthly benefit and the annual COLA percentage to see your new benefit, monthly and annual increase.
  • Inflation Impact on Retirement Savings Calculator
    See how inflation erodes your retirement savings. Convert a future nominal amount into today's real purchasing power using compound inflation.
  • Retirement Paycheck Calculator
    Estimate the monthly paycheck your retirement savings can provide over a set payout period at a given return rate. Free annuity-style income calculator.
  • Zero-Based Budget Calculator
    Build a zero-based budget by assigning every dollar of income to a category. Instantly see your unassigned balance and whether your budget is balanced.
  • Stacked Discount Calculator
    Stack multiple percent-off discounts on one price. See the final price, total savings, and the true effective discount rate instantly.
  • Disposable Income Calculator
    Calculate your disposable income — the money left after expenses. Enter net monthly income and total expenses to see leftover cash and savings rate.
  • Savings Goal Timeline Calculator
    Find out how many months and years it takes to reach a savings goal based on your current savings and monthly contribution. Free and instant.
  • Average Speed Calculator (Two Distances)
    Calculate average speed across two legs of a trip using total distance divided by total time. Free, instant average speed calculator for any units.
  • Electric vs Gas Car Cost Calculator
    Compare the cost per mile of an electric vs gas car. Enter gas price, MPG, electricity rate and EV efficiency to see your annual fuel savings.
  • Total Cost of Car Ownership Calculator
    Estimate the true 5-year total cost of owning a car: depreciation, fuel, insurance, maintenance, financing and taxes — with per-year and per-month figures.
  • Jet Lag Recovery Calculator
    Estimate how many days you need to recover from jet lag based on time zones crossed and travel direction (eastward vs westward). Free, instant result.
  • How Much Will I Save Calculator
    Find out how much money you save with a percent-off discount. Enter the original price and discount % to see your dollar savings and final price.
  • Cashback Calculator
    Free cashback calculator: enter a purchase amount and cashback rate to instantly see your rewards earned and the net cost after cashback.
  • Knots to MPH and KM/H Converter
    Convert knots to miles per hour and kilometers per hour instantly. Free aviation and marine speed converter using exact conversion factors.
  • Retirement Income Inflation Calculator
    Estimate the future annual income you'll need at retirement after inflation. Enter today's income, inflation rate, and years to retirement to see the real cost.
  • Inflation-Adjusted Rent Calculator
    Estimate future rent adjusted for inflation. Enter current rent, annual inflation rate, and years to see your projected monthly rent and total increase.
  • 401(k) Employer Match Calculator
    US 401(k) employer match calculator. Enter salary, your contribution %, match rate and cap to see the free money your employer adds each year.
  • Feet to Meters Elevation Converter
    Convert elevation in feet to meters instantly. Enter altitude in feet to get the exact metric value using the standard 1 ft = 0.3048 m factor.
  • Frequent Flyer Miles Value Calculator
    Find out how many cents per mile you get from an award flight. Compare your points redemption value against the cash price minus taxes and fees.
  • Nautical Miles to Kilometers/Miles Converter
    Convert nautical miles to kilometers and statute miles instantly. 1 nautical mile = 1.852 km = 1.15078 miles. Fast, accurate distance converter.
  • Knots to MPH & KM/H Converter
    Convert knots to miles per hour (mph) and kilometers per hour (km/h) instantly. Free, accurate marine and aviation speed converter.
  • Overweight Baggage Fee Calculator
    Estimate your airline overweight checked-baggage fee from bag weight, free allowance, fee increment, and price per increment. Fast and free.
  • Car Trip Carbon Footprint Calculator
    Calculate the CO₂ emissions of a car trip from distance, fuel economy and fuel type. Split the footprint per passenger and see grams of CO₂ per km.

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