Calculate anything
for your project
Materials, costs, quantities — get accurate estimates for home improvement projects in seconds.
Browse by Category
Landscaping & Outdoor
Calculate how much mulch, gravel, topsoil, sod, and other landscaping materials you need for your outdoor projects.
Concrete & Masonry
Estimate concrete, brick, paver, and block quantities for slabs, walls, patios, and other masonry projects.
Painting & Staining
Figure out how many gallons of paint or stain you need for interior walls, decks, fences, and more.
Flooring
Calculate tile, laminate, vinyl plank, carpet, and grout quantities with waste factor included.
Crafts & DIY
Calculate wax, lye, resin, fragrance oils, and wick sizes for your DIY projects.
Wedding Planning
Plan your perfect wedding with calculators for catering, alcohol, budget, seating, and more.
Aquarium & Fish
Calculate tank volume, fish stocking levels, CO2, fertilizers, and water changes for your aquarium.
Homebrewing
Calculate ABV, IBUs, priming sugar, mash water, and alcohol dilution for homebrewing.
Landscaping & Outdoor
3 calculators
Concrete & Masonry
3 calculators
Painting & Staining
2 calculators
Flooring
3 calculators
Crafts & DIY
5 calculators
Candle Wax Calculator
Calculate exactly how much wax to melt for your candle jars.
Soap Making Lye Calculator
Calculate lye and water ratio for cold process soap making.
Epoxy Resin Volume Calculator
Estimate how much epoxy resin you need for molds, tables, or coatings.
Wick Size Calculator
Find the recommended wick size for your candle jar diameter.
Fragrance Oil Calculator
Calculate how much fragrance oil to add to your candle wax.
Wedding Planning
5 calculators
Wedding Food Calculator
Calculate exactly how much food you need for your wedding reception.
Wedding Alcohol Calculator
Calculate how many bottles of wine, beer, and spirits you need for your wedding.
Wedding Budget Calculator
Estimate your total wedding cost based on guest count and style preferences.
Wedding Seating Calculator
Calculate how many tables, chairs, and table arrangements you need for your reception.
Wedding Catering Cost Calculator
Estimate your catering costs based on service style, menu, and guest count.
Aquarium & Fish
5 calculators
Fish Tank Volume Calculator
Calculate the exact volume of your aquarium in gallons and liters.
Aquarium Stocking Calculator
Find out how many fish your aquarium can safely hold using the inch-per-gallon rule.
Aquarium CO2 Calculator
Calculate the ideal CO2 concentration for your planted aquarium using pH and KH.
Aquarium Fertilizer Dosing Calculator
Calculate the correct fertilizer dose for your planted aquarium by tank volume.
Aquarium Water Change Calculator
Calculate how much water to change and how long it takes to reach your target nitrate level.
Homebrewing
5 calculators
ABV Calculator
Calculate the alcohol by volume (ABV) of your homebrew beer, wine, or cider.
Priming Sugar Calculator
Calculate exactly how much priming sugar to add for perfect bottle carbonation.
IBU Calculator
Calculate the International Bitterness Units (IBUs) of your homebrew recipe.
Mash Water Calculator
Calculate the amount of strike water and sparge water for all-grain brewing.
Alcohol Dilution Calculator
Calculate how much water to add to dilute a spirit or high-gravity beer to your target ABV.
About Calcomo
Calcomo provides free, accurate calculators for home improvement and construction projects. Whether you're building a patio, painting a room, or laying new flooring, our tools help you estimate the right amount of materials before you buy.
All calculators include waste factors, cost estimates, and detailed explanations of formulas used. Results are approximate — always verify quantities with your supplier or contractor before making large purchases.