FitAndFillFree home project calculators for U.S. DIYers
Quick, no-signup calculators for the numbers you need before a trip to the home center: how much concrete, gravel, paint, tile, shingles, fencing, decking, sod or mulch to buy for a project, plus a square footage calculator for the area itself.
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Concrete Slab Calculator
Estimate the concrete for a rectangular slab in cubic yards and in 40, 50, 60, 80 or 90 lb bags, with a waste allowance.
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Paint Calculator
Work out how much paint a room needs from its size, doors, windows, number of coats and the coverage printed on the can.
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Mulch Calculator
Estimate mulch for a rectangular or round bed in cubic yards and bags, and compare the cost of bulk delivery with bagged mulch.
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Gravel and Stone Calculator
Estimate how many cubic yards and how many tons of gravel, crushed stone or sand you need for an area and a depth, with typical weights by material.
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Tile Calculator
Work out how many tiles and boxes you need for a floor or wall from its size, the tile size, the grout joint and a waste allowance.
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Roofing Shingle Calculator
Estimate the roof area, roofing squares and bundles of shingles from the roof footprint and its pitch, with an allowance for cuts and waste.
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Fence Calculator
Estimate the posts, sections, rails and pickets for a fence from its length, post spacing, gates and picket size.
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Sod Calculator
Work out how many square feet, rolls or slabs and pallets of sod you need for a lawn, with an allowance for cuts and waste.
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Square Footage Calculator
Find the area of a rectangle, triangle, circle or trapezoid in square feet, square yards, square meters and square inches, from measurements in feet, inches, yards, meters or centimeters.
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Deck Calculator
Estimate the deck boards, joists and fasteners for a rectangular deck from its size, the board width and gap, the joist spacing and an allowance for waste.
Guides
New to measuring? These short guides explain the basics, with diagrams and worked examples.
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How to Measure Square Footage
A step-by-step method to measure any floor or lawn: sketch it, split it into rectangles, triangles and circles, and add the areas, with worked examples and a diagram.
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Cubic Yards Explained
What a cubic yard is, how to get it from length, width and depth, how much ground one cubic yard covers at each depth and how many bags that is, with diagrams and tables.
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How to Measure for a Fence
How to count posts, sections, rails and pickets for a fence that goes around a yard, why corner posts are shared and how a gate changes the count, with a top-down diagram.
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Roof Pitch Explained
What a roof pitch such as 6/12 means, how to measure it from the attic or from the end of the house, and how the pitch turns a roof footprint into a real roof area, with diagrams and a table.
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How Much Paint Do You Need
A five-minute method to estimate the gallons of paint for a room from its walls, doors, windows and coats, with a diagram of the walls laid flat and a worked example.
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How Many Tiles Do You Need
How to turn a floor or wall area into a number of tiles and boxes, why the grout joint matters, and how much extra to add, with a diagram and worked examples.
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Deck Boards and Joists
How the joists, deck boards and fasteners of a deck fit together and how to count each one from a few measurements, with a top-down diagram and tables for joist spacing and board length.
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How to Order Sod
How to measure a lawn, add the right allowance and convert square feet into rolls, slabs and pallets, plus what extension services say about delivery, timing and laying, with a diagram.
How these calculators are built
- Formulas in plain sight. Every page shows the math and a worked example calculated by the same code the tool uses.
- Tested. The calculation code is covered by automated tests, including rounding edge cases.
- Sources and dates. Product yields and coverage figures link to their source and show when they were last checked.
- Private. The numbers you enter are calculated in your browser and are not sent to us.
Read more in our editorial policy.
Good to know
Results are planning estimates. Real projects have uneven ground, waste and product differences, so buy a little extra and follow the instructions on the product label and your local building rules.