Free Online Calculators & Tools
Powerful, easy-to-use calculators and tools for finance, health, construction, and everyday tasks. No sign-up required.
Financial Calculators
Mortgage Calculator
Calculate monthly mortgage payments, total interest, and amortization schedules.
Compound Interest Calculator
See how your investments grow over time with compound interest.
CD Calculator
Calculate certificate of deposit earnings with APY, compounding, and term length.
Loan Payoff Calculator
Find out how quickly you can pay off your loans with extra payments.
Debt Snowball Calculator
Create a debt payoff plan using the snowball or avalanche method.
Salary Calculator
Convert between hourly, weekly, monthly, and annual salary amounts.
Tip Calculator
Quickly calculate tips and split bills among friends or colleagues.
Retirement Calculator
Plan your retirement savings and estimate your future nest egg.
Investment Return Calculator
Calculate ROI and compare different investment scenarios.
Health & Fitness
Construction & Home Improvement
Gravel Calculator
Estimate gravel volume, weight, and bags needed for driveways, patios, and landscaping.
Drywall Calculator
Calculate drywall sheets, joint compound, and tape needed for walls and ceilings.
Tile Calculator
Estimate tiles and boxes needed for floors or walls with waste and grout adjustments.
Fence Calculator
Calculate posts, rails, pickets, and concrete needed for wood or chain link fences.
Brick Calculator
Estimate bricks, mortar bags, and sand needed for walls and masonry projects.
Stair Calculator
Calculate stair dimensions, riser height, tread depth, and stringer length to code.
Sod Calculator
Calculate sod rolls and pallets needed for your lawn with cost estimates.
Measurement & Conversion
Education
Developer & Text Tools
QR Code Generator
Generate QR codes for URLs, text, contact info, and more.
Password Generator
Create strong, secure passwords with customizable options.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
Color Picker
Pick colors and convert between HEX, RGB, HSL, and other formats.
Case Converter
Convert text between uppercase, lowercase, title case, and more.
Lorem Ipsum Generator
Generate placeholder text for your designs and layouts.