Free Online Calculators for the US
Simple. Accurate. Instant.
Mortgage, paycheck, auto loan, BMI, age, and everyday tools — built for Americans. No signup. No downloads. 100% free.
Car Payment Calculator
Calculate your monthly car payment with taxes, fees, and trade-in.
Gas Mileage Calculator
Track MPG, trip cost, and total fuel spend for any vehicle.
Concrete Calculator
Calculate concrete volume in cubic yards for slabs, footings, and columns.
Tile Calculator
Calculate how many tiles you need for floors or walls — with waste allowance.
Paint Calculator
Calculate how many gallons of paint you need for any room.
Roof Cost Calculator
Estimate roof replacement cost based on square footage and material.
Property Tax Calculator
Estimate annual property tax by state and home value.
Closing Cost Calculator
Estimate your total closing costs when buying a home in the US.
House Affordability Calculator
Find out how much house you can afford based on your income and debts.
Rent vs Buy Calculator
Compare the true cost of renting vs buying a home in your city.
Unit Converter
Convert length, weight, temperature, and volume units instantly.
Random Number Generator
Generate random numbers, lottery picks, and dice rolls instantly.
Grade Calculator
Calculate your current class grade and what you need on the final exam.
GPA Calculator
Calculate your weighted or unweighted high school and college GPA.
Discount Calculator
Calculate sale price and total savings from any discount percentage.
Tip Calculator
Calculate tips and split the bill instantly — perfect for US restaurants.
Time Zone Converter
Convert time between US and world time zones instantly.
Date Calculator
Add or subtract days, weeks, months, and years from any date.
Percentage Calculator
Solve any percentage problem — increase, decrease, of, and difference.
Heart Rate Zone Calculator
Find your 5 training heart rate zones for fat burning, cardio, and peak performance.
Built for speed, accuracy, and privacy
The calculators US professionals, families, and students trust — with zero friction.
Instant Results
No signups. No downloads. No waiting. Land on the page and get your answer immediately.
US-Standard Accuracy
All calculators use the same formulas US lenders, tax software, and financial advisors rely on.
Privacy First
Everything runs in your browser. We never store, share, or sell any of your input data.
Latest from the blog
Practical guides for US families, buyers, and savers.
How to Consolidate Credit Cards Into One Payment
Learn how to consolidate credit cards into one payment. Compare balance transfers, personal loans, HELOCs, and credit counseling. Save up to $20,000.
How to Convert a 3.5 Weighted GPA to Unweighted
What is a 3.5 weighted GPA in unweighted terms? Learn the conversion, why it varies, and how colleges interpret a 3.5 weighted GPA.
How to Calculate Weighted GPA (Step-by-Step Guide)
Learn how to calculate weighted GPA with Honors, AP, and IB bonus points. Step-by-step formula, worked examples, and a free GPA calculator.
Get new tools & money tips in your inbox
Join thousands of American readers. New calculators, finance guides, and tips every week.