Free measurement tools.
Plan the job right.

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

Quick startOnline rulerCalibrate your screen and use a real-size online ruler in inches, centimeters, and millimeters.Screen dimensionsCalculate TV or monitor width and height from diagonal size and aspect ratio. A 55-inch 16:9 screen is about 47.9 inches wide.MulchCalculate mulch in cubic yards, cubic feet, and 2 cu ft bags by bed size and depth. Compare common 2-inch and 3-inch layers.FlooringCalculate flooring square footage, cutting waste, whole boxes, coverage, and material cost.VolumeCalculate cubic feet and cubic yards from length, width, and height for boxes, rooms, and soil beds.

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 online ruler in inches, centimeters, and millimeters.Screen PPICalculate screen pixel density from resolution and diagonal size.Screen dimensionsCalculate TV or monitor width and height from diagonal size and aspect ratio. A 55-inch 16:9 screen is about 47.9 inches wide.

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 mulch in cubic yards, cubic feet, and 2 cu ft bags by bed size and depth. Compare common 2-inch and 3-inch layers.TileCalculate tiles and boxes for a floor or wall, including grout spacing, cutting waste, and cost.FlooringCalculate flooring square footage, cutting waste, whole boxes, coverage, and material cost.PaintCalculate paint gallons for walls and ceilings after subtracting doors and windows. Include coats, coverage, cost, and whole-can rounding.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 inches at 96 PPI, 300 DPI, or any custom density. See screen and print-size examples such as 1920 px.AreaCalculate square feet from length and width.VolumeCalculate cubic feet and cubic yards from length, width, and height for boxes, rooms, and soil beds.

How MeasureSpark helps with everyday projects

Use the online ruler for a quick physical check on a calibrated screen, the screen size calculator for TV and monitor fit, or a material calculator when you are planning a store run. Mulch, flooring, and paint tools turn measurements into bag, box, or gallon estimates and show the assumptions behind the result.

Every core calculation runs locally in your browser. Start with the supplied defaults, replace them with measurements from your room or product label, and confirm the final quantity against manufacturer instructions before buying.

Your measurements stay on your device.

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