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Mortgage Calculator
Estimate a monthly mortgage payment with taxes, insurance, PMI, HOA dues, and extra principal.
50 tools. Everyday possibilities.
Life has numbers.
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From a first home to a split dinner bill. Free online calculators for the decisions, plans, and little questions that fill your day.
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A little math. A little less mental load.
Your everyday toolkit
A good place to start.
A few favorites for the numbers that come up most.
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Borrowing
Auto Loan Calculator
Estimate a car payment, amount financed, total interest, and total loan cost.
Income
Paycheck Calculator
Estimate take-home pay after federal withholding, Social Security, Medicare, and entered deductions.
Money
Compound Interest Calculator
Project account growth with compound interest and recurring contributions.
Shopping
Sales Tax Calculator
Add sales tax to a price or reverse a tax-inclusive total using the rate you enter.
Shopping
Tip Calculator and Bill Splitter
Calculate a restaurant tip, total bill, and equal per-person split.
Shopping
Discount Calculator
Calculate the sale price and dollar savings from a percentage discount.
Everyday
Fuel Cost Calculator
Estimate fuel used and trip cost from distance, MPG, and gas price.
Math
Percentage Calculator
Solve percent-of, what-percent, percentage-change, and reverse-percentage questions.
Measurement
Square Footage Calculator
Calculate floor or surface area in square feet from length and width.
Date & Time
Age Calculator
Calculate age from a birth date to a selected date.
One question. The right tool.
What are you working out?
Money and borrowing
Mortgage, auto loan, debt, credit-card, and borrowing tools.
7 calculatorsIncome and saving
Pay, overtime, savings, interest, CDs, and return calculations.
12 calculatorsShopping and everyday
Tips, sales tax, discounts, unit prices, fuel costs, and gas mileage.
8 calculatorsMath and measurement
Percentages, fractions, averages, ratios, areas, volumes, and measurements.
9 calculatorsDates and time
Age, date differences, countdowns, shift hours, and time duration.
6 calculatorsConversions
Fast temperature, length, weight, and distance conversions.
8 calculatorsTry the numbers. See what changes.
Adjust your inputs and compare results without starting over.
The working is there, too.
Each tool explains its formula, with an example and the assumptions behind the answer.
No account. No forms. Just the tool.
Calculations run in your browser. Your numbers stay out of sign-up forms and sales funnels.