Clean calculators for real problems.
Whether you're ordering topsoil, pouring concrete, or figuring out how big your puppy will get — we do the math so you don't over-order, under-prepare, or guess.
See it in action
Our most-used calculator. Try the math right here — no clicks required.
Topsoil Calculator
Calculate cubic yards, tons, and bags of topsoil for any garden bed or lawn project. Adjusts automatically for depth.
All 13 calculators
Free tools for home, construction, and pet care. Organized by category.
Construction
Concrete, asphalt, gravel, roofing, and framing.
Fence Calculator — Posts, Panels, Pickets & Cost
Work out exactly how many posts, panels, pickets, and rails you need for any fence project. Saves you from counting twice at the lumber yard.
ConstructionAsphalt Calculator — Tonnage & Cost Estimator
Calculate tonnage and cost for driveway paving, resurfacing, or parking lot jobs. Works with standard hot-mix asphalt at any thickness.
ConstructionTile Calculator — Square Feet, Tiles & Waste
Work out exactly how many tiles you need, including waste for cuts and breakage. Works for any room size, any tile dimensions — floors, walls, backsplashes.
ConstructionConcrete Calculator — Cubic Yards, Bags & Cost
Calculate exactly how much concrete you need for slabs, footings, sidewalks, or driveways. Results in cubic yards, 80lb bags, 60lb bags, and total cost.
ConstructionRoof Pitch Calculator — Angle, Rise & Rafter Math
Convert rise and run into roof pitch, angle in degrees, and rafter length factor. Essential math for framing, re-roofing, or picking the right shingles.
ConstructionSand Calculator — Tons & Cubic Yards for Any Project
Calculate tons and cubic yards of sand for paver bases, sandboxes, playgrounds, or construction. Works with all sand types from masonry to play sand.
ConstructionGravel Calculator — Tons, Cubic Yards & Cost
Calculate gravel tonnage and cubic yards for driveways, walkways, drainage, or any landscape project. Works for pea gravel, crushed stone, and river rock.
Home & Garden
Topsoil, mulch, soil, paint, and landscaping math.
Mulch Calculator — Cubic Yards & Bags Needed
Work out exactly how much mulch you need — in cubic yards or bags — before you head to the garden center. Works for wood chips, bark, and decorative mulches.
Home & GardenTopsoil Calculator — Cubic Yards, Tons & Bags
Figure out exactly how much topsoil you need — in cubic yards, tons, or bags — before you order. No guessing, no over-ordering.
Dog Age Calculator — Convert Dog Years Accurately
Convert your dog's age to human years with a modern, breed-adjusted formula. More accurate than the "multiply by 7" myth — size matters after year 2.
PetsDog Pregnancy Calculator — Due Date & Stages
Pick your dog's breeding date and get the expected whelping date, current week of pregnancy, and what's happening at each stage. Works for all breeds.
PetsCat Age Calculator — Cat Years to Human Years
Convert your cat's age to human years with a modern veterinary formula. See which life stage your cat is in and what care it needs at that age.
PetsPuppy Weight Calculator — Predict Adult Size
Predict how big your puppy will get based on their current age, weight, and breed size. Most accurate between 14 and 26 weeks old.
How it works
No signups, no fluff — three steps from question to answer.
Pick your tool
Browse by category or search by name. Every calculator opens immediately — no signup required, no email harvesting.
Enter your numbers
Length, width, depth, weight, breeding date — whatever the math needs. Most calculators take under 30 seconds.
Get the answer
Multiple result formats — cubic yards, tons, bags, or whatever your supplier asks for. Print or screenshot away.
Why we built this
Tools first. Content second. Always.
Most calculator sites on the web are bloated, ad-ridden, and designed to keep you scrolling rather than answer your question. That's the opposite of what a calculator should be.
A calculator is a tool. You come with a question, you leave with an answer. The math should be instant, the answer should be trustworthy, and nothing in between should get in your way.
Every formula on TidyCalculator comes from industry standards — for construction materials, from contractor references and trade publications; for pet health, from peer-reviewed veterinary literature. Pet content is reviewed by a licensed veterinarian.
Common questions, instant answers
Real examples of what TidyCalculator solves.
Vet-reviewed pet content
Pet health calculators reviewed by Dr. Sarah Chen, DVM.
Industry-standard formulas
Sourced from contractor references and veterinary literature.
No signups, no paywalls
Free forever. No accounts, no email harvesting, no ads above the fold.