Simple, mobile-friendly calculators for construction, pay estimates, unit conversions, and everyday jobsite math. Get instant answers without an account.
Estimate bags of concrete for slabs, footings, and pads.
PopularCalculate area for rooms, floors, slabs, and project surfaces.
Calculate cubic yards or feet of concrete needed.
Estimate gravel volume for driveways and landscaping projects.
Estimate sheets of drywall needed for walls and ceilings.
Estimate tile quantity for floor or wall installations.
Calculate pitch ratio and angle from rise and run.
Estimate riser count and rise height for any staircase.
Estimate gallons of paint for any surface area.
Estimate mulch needed by garden area and depth.
Estimate posts and sections for fence projects.
Calculate regular pay, overtime pay, and total weekly gross.
Convert your hourly rate to weekly gross pay.
Calculate your 1.5× overtime rate and total pay.
Convert weekly pay to annual gross income.
Estimate the hourly rate a contractor needs to charge.
Convert feet to inches instantly.
Convert inches to feet instantly.
Convert yd³ to ft³ for concrete and material orders.
Convert lb to kg instantly.
Convert US gallons to liters instantly.
Convert Celsius to Fahrenheit and back.
Convert pressure between PSI and bar.
Convert miles to km instantly.
Built for tradespeople, contractors, homeowners, and project managers who need fast answers on the jobsite or at the hardware store. Enter your measurements, get your estimate immediately — no app install, no sign-up, no loading screens.
All calculators include waste factors, real-world examples, and plain-English explanations of every formula. Works on iPhone, iPad, and desktop, even with a poor cell signal.