Calculators that actually calculate — with sourced values.
Free, no sign-up, no cookies. Every calculator names its source and the date of the values used — in dollars, with US defaults.
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Tax & Salary
US Paycheck Calculator What stays from your US salary? Calculate your 2026 take-home pay from your annual gross — with federal income tax, FICA (Social Security + Medicare) and your optional state tax rate, per year, month and paycheck. PTO Accrual Calculator How much paid time off have you accrued? Work out your PTO per paycheck and your current balance — in days and hours. Severance Pay Tax Calculator What’s left of your severance? Estimate the federal tax withheld (supplemental rate) plus FICA and your take-home — in dollars. Self-Employment Tax Calculator How much self-employment tax do you owe? From your net profit, work out the Social Security and Medicare tax (SECA, 15.3%) and the deductible half — in dollars. Per Diem Calculator (M&IE) How much per diem (M&IE) do you get for a business trip? Work out the GSA meals & incidental expenses allowance with the 75% first/last-day rule — in dollars. Sales Tax Calculator Calculate US sales tax: tax amount and total from the pre-tax price — or work backward from the total. With a freely adjustable rate. Crypto Tax Calculator (US) How much federal tax applies to your crypto gain in 2026? Short-term (ordinary rates) vs long-term (0/15/20%) — including the savings from holding for more than one year.
Finance
Salary Converter Convert between hourly wage and weekly, monthly and yearly salary — in dollars, based on your weekly hours. Pay Raise Calculator What is your raise really worth? Compute the real, inflation-adjusted raise in $ and % — and whether it beats inflation. Compound Interest & Savings Calculator How does your money grow? Calculate the future value of a starting amount plus monthly contributions — final balance, total contributions and interest earned, in dollars. Loan Calculator What does your loan cost? Compute the monthly payment, total cost, total interest and effective annual rate from loan amount, APR and term — in dollars. Inflation & Purchasing Power Calculator What will your money be worth in a few years? Calculate the loss of purchasing power and how much you’ll need later for the same value — in dollars. Rental Yield Calculator Is the US property worth it as an investment? Calculate gross and net rental yield plus the gross rent multiplier from purchase price, monthly rent and costs — in dollars. Retirement Gap Calculator How big is your retirement gap? Monthly need minus Social Security and other retirement income — plus the nest egg required (4% rule) and the monthly saving needed until retirement.
Energy
Electricity Cost Calculator What does a device cost in electricity? Calculate yearly, monthly and daily cost plus consumption from power, usage and price — in dollars, with the US electricity price. Heating Cost Comparison What does heating with natural gas, heating oil, propane or a heat pump cost? Compare annual energy cost at the same heat demand — in dollars, with US prices.
Car & Mobility
Gas Cost Calculator What does a trip cost in gas? Calculate gas cost, gallons used and cost per person from distance (miles), MPG and gas price — including carpooling and round trips. EV vs. Gas Car Cost Calculator Is an EV worth it in the US? Compare cost per 100 miles, yearly fuel cost and when the higher EV price pays off — in dollars, miles and MPG.
Everyday
Tip Calculator & Bill Splitter Calculate the tip and split the bill fairly: tip amount, total and amount per person — with optional rounding up to the next dollar. In the US 15–20% is customary. Dog Cost Calculator What does a dog really cost in the US? Calculate monthly and yearly cost, the first year incl. setup and the cost over the whole dog’s life — in dollars. Moving Cost Calculator What will your move cost? Add up movers/truck, packing, deposits, travel and storage into one budget — in dollars. Plus the US tax rules. Wedding Budget Calculator What will your wedding cost? Plan the budget from venue, catering, rings and more — with total and cost per guest, in dollars.
Health
Calorie & Macro Calculator Calculate BMR, daily calories (TDEE) and your macros (protein, fat, carbs) from weight (lb) and height (ft/in) — with a goal for cutting, maintaining or bulking. BMI Calculator Calculate your body mass index from height (ft/in) and weight (lb) — with WHO weight class and the healthy weight range in pounds. Blood Alcohol (BAC) Calculator Estimate your blood alcohol concentration in % (BAC) with the Widmark formula — NIAAA standard drinks, elimination over time, and where you stand against the 0.08% limit (0.05% in Utah). Never a clearance to drive. Due Date Calculator Estimated due date by Naegele’s rule, how many weeks pregnant you are, and your trimester — the way US clinicians date a pregnancy (ACOG).