Measure the job.
Plan it right.

Free rulers, screen tools, and home project calculators that give you the number without an account.

Open the online ruler

Quick startOnline rulerCalibrate your screen and use a real-size ruler in inches, centimeters, and millimeters.ConcreteEstimate cubic yards of concrete for a rectangular slab.TileEstimate tiles needed for a floor or wall, including waste.PaintEstimate gallons of wall paint for a rectangular room.

Choose the job in front of you

Each tool opens with useful defaults, plain-language assumptions, and no data upload.

Screen & ruler

Measure what is on or beside your display.

Online rulerCalibrate your screen and use a real-size ruler in inches, centimeters, and millimeters.Screen PPICalculate screen pixel density from resolution and diagonal size.Screen dimensionsFind screen width from diagonal size and aspect ratio.

Home projects

Plan material quantities before the store run.

ConcreteEstimate cubic yards of concrete for a rectangular slab.GravelEstimate tons of gravel for a driveway, path, or base layer.MulchCalculate cubic yards of mulch for garden beds.TileEstimate tiles needed for a floor or wall, including waste.FlooringEstimate square feet of flooring to purchase.PaintEstimate gallons of wall paint for a rectangular room.WallpaperEstimate double rolls of wallpaper for a room.DeckingEstimate linear feet of deck boards for a rectangular deck.Fence postsEstimate fence posts from total run and spacing.

Conversions

Move cleanly between common dimensions.

Pixels to inchesConvert pixels to physical inches using a known PPI.AreaCalculate square feet from length and width.VolumeCalculate cubic feet from length, width, and height.

Your measurements stay on your device.

Core calculations run in the browser. There is no account, project history, or measurement database.