Home, Garden & Craft Calculators
Free calculators for mulch, gravel, topsoil, paint, concrete, tile, seed, pond liners, firewood, candle wax and epoxy resin. Formulas and bag sizes shown on every page.
Every home, garden and workshop calculator on CalcNest, in one place. These tools answer the question you actually have at the store: how many bags, how many gallons, how many cubic yards, how much will it cost. Each calculator publishes the coverage rate or density it assumes — about 350 square feet per gallon of paint, 1.4 tons per cubic yard of gravel, 2 to 4 inches of mulch — plus the bag sizes suppliers commonly sell, so you can swap in your own numbers. Where real materials vary (stone type, wax blends, seed cultivars) the page says so and shows you how to adjust the result instead of pretending there is one exact answer.
All 14 home, garden and craft calculators
Mulch Calculator
Cubic yards, cubic feet and bags of mulch for any bed size and depth.
Gravel Calculator
How much gravel you need in cubic yards and tons, by area and depth.
Topsoil Calculator
Topsoil volume in yards plus tons and bag counts for lawns and beds.
Paint Calculator
Gallons of paint for a room, with doors and windows subtracted.
Grass Seed Calculator
Pounds of seed for your lawn size, by grass type and seeding method.
Raised Bed Soil Calculator
Soil volume and bag counts for any raised bed or planter size.
Pond Liner Calculator
Liner size that covers your pond's length, width, depth and overlap.
Sourdough Hydration Calculator
True dough hydration percentage, including your starter's water.
Candle Wax Calculator
Wax and fragrance oil amounts per container, by wax type and load.
Aquarium Heater Calculator
Heater wattage for your tank size and the temperature rise you need.
Firewood Cord Calculator
Full cords and face cords in any stack, with cost per cord.
Tile Calculator
Tiles and boxes needed for a floor or wall, with grout gaps and waste allowance.
Concrete Calculator
Slabs, footings and columns: cubic yards or metres plus 60 lb and 80 lb bags to buy.
Epoxy Resin Calculator
Mixed volume, resin/hardener split by ratio, kits to buy and cost per square foot.
How these calculators are built
Each tool is a single static page: the form and the arithmetic run in your browser, so there is no account, no upload and no waiting. The formula block on every page names the constants used, and the FAQ covers the exceptions. If a number disagrees with your supplier or your tape measure, the page tells you which assumption to change rather than hiding it behind a single "result" number.
New calculators are added every week. If something is missing, send a request — reader suggestions decide what gets built next.