55 free tools across 12 categories. Pick a calculator. Every result shows the formula behind it.
Topsoil or garden soil for beds, lawns, and leveling, in cubic yards, cubic feet, or bags.
Open calculatorBark, wood chip, or straw mulch for beds and borders, by the bag or by the yard.
Open calculatorCompost for amending beds or top-dressing a lawn, based on the depth you plan to spread.
Open calculatorVolume and weight of gravel or crushed stone for driveways, paths, and drainage.
Open calculatorGrass seed for a new lawn or overseeding, using your seed's own label rate.
Open calculatorSoil to fill one or several raised beds, with bag counts for common bag sizes.
Open calculatorSquare footage, pieces, and pallets of sod for a new lawn, with waste allowance.
Open calculatorHow much fertilizer product to spread, based on your nitrogen target and the bag’s N percentage.
Open calculatorMeasure any lawn by adding rectangles, circles, and triangles — and subtracting beds and patios.
Open calculatorHow many plants fit in a bed at your spacing, in a square grid or an offset (triangular) pattern.
Open calculatorTotal planting area for beds of any shape, with paths and features subtracted.
Open calculatorCount planting squares in a bed and see plant totals at 1, 4, 9, or 16 per square.
Open calculatorPavers for a patio or path, plus base and sand volumes and an optional cost estimate.
Open calculatorConcrete for slabs, pads, and round footings — in cubic yards, cubic meters, or bags.
Open calculatorEdging pieces, connectors, and stakes for straight or curved bed borders.
Open calculatorRolls of weed barrier fabric for beds and paths, accounting for roll width and seam overlap.
Open calculatorPosts, rails, pickets, and post-hole concrete for a straight run of fence.
Open calculatorGallons and sprinkler run time to apply your target amount of water each week.
Open calculatorHow much rain your roof can shed into barrels or tanks for a given rainfall.
Open calculatorGallons or liters of paint for walls, after doors and windows, using your paint’s label coverage.
Open calculatorTiles and boxes for floors, walls, and backsplashes, including grout joints and waste.
Open calculatorSquare footage and boxes of laminate, vinyl plank, or hardwood flooring.
Open calculatorDrywall sheets for walls and ceilings in 4 × 8, 4 × 10, or 4 × 12 sizes.
Open calculatorDeck boards and linear feet for a rectangular deck, with board gaps and waste.
Open calculatorRoof area from footprint and pitch, roofing squares, and shingle bundles.
Open calculatorFind a percent of a number, what percent one number is of another, or percent change.
Open calculatorAdd, subtract, multiply, and divide fractions, with simplified and mixed-number answers.
Open calculatorMean, median, mode, range, and standard deviation for any list of numbers.
Open calculatorFind the hypotenuse or a missing leg of a right triangle.
Open calculatorSimplify ratios and scale them up or down to find a missing value.
Open calculatorMonthly payment, total interest, and total cost for a fixed-rate loan.
Open calculatorMonthly mortgage payment with optional property tax, insurance, and HOA fees.
Open calculatorHow savings grow with compound interest and regular monthly contributions.
Open calculatorHow much to save each month to reach a goal by a target date.
Open calculatorSale price, savings, sales tax, and final total for any discount.
Open calculatorTip amount, total, and split per person for any bill.
Open calculatorBody mass index for adults, with the standard weight categories.
Open calculatorEstimated daily calories to maintain weight, using the Mifflin–St Jeor equation.
Open calculatorEstimate body fat percentage from tape measurements (U.S. Navy method).
Open calculatorEstimated maximum heart rate and five training zones.
Open calculatorA simple screening ratio comparing waist size with height.
Open calculatorInterest and total for simple (non-compounding) interest.
Open calculatorReturn on investment and annualized return for any investment.
Open calculatorHow long it takes to pay off a card balance and the total interest.
Open calculatorConvert hourly, weekly, monthly, and yearly pay before taxes.
Open calculatorProfit, margin, and markup from cost and selling price.
Open calculatorSolve ax² + bx + c = 0, including complex roots.
Open calculatorRaise numbers to any power or take any root.
Open calculatorStandardize a value and find its percentile in a normal distribution.
Open calculatorConvert between Fahrenheit, Celsius, and Kelvin.
Open calculatorConvert numbers between binary, octal, decimal, and hexadecimal.
Open calculatorExact age in years, months, and days, plus days to the next birthday.
Open calculatorPace per kilometer and mile, and average speed, from distance and time.
Open calculatorEstimate your one-rep max from a weight and reps, with training percentages.
Open calculatorBricks for a wall from its size, brick dimensions, and mortar joint.
Open calculator