Fast, accurate, mobile-friendly calculators to estimate materials, costs, measurements, conversions, and everyday calculations.
The tools people reach for first — including our flagship Pea Gravel Calculator.
Estimate pea gravel volume, weight, bags and cost for walkways, patios, playgrounds and drainage.
Estimate gravel volume, weight, bags and cost for driveways, patios and landscaping.
Cubic yards of concrete needed for slabs, footings and columns.
Cubic yards and 2 cu ft bags of mulch for garden beds.
Monthly mortgage payment from loan, rate and term.
Body Mass Index from height and weight.
Every calculator, grouped by the job you're trying to get done.
Estimators for materials, labor, and building projects.
Paint, flooring, drywall, and DIY project helpers.
Concrete, gravel, sand, mulch, soil, and aggregates.
Yards, gardens, pathways, and outdoor spaces.
Mortgages, loans, interest, and personal finance.
ROI, margins, break-even, and business decisions.
Percentages, fractions, algebra, and everyday math.
Physics, chemistry, and scientific tools.
BMI, calories, hydration, and wellness.
Age, durations, and date differences.
Length, weight, temperature, and unit converters.
Fuel, MPG, and EV charging cost.
Ad spend, keyword ROI, and traffic value.
AI cost, freelancer rate, and tool ROI.
Tips, discounts, and quick daily calculators.
Estimate concrete, asphalt, brick, roofing and more.
Cubic yards of concrete needed for slabs, footings and columns.
Cubic yards and bags of concrete for a slab.
Tons of asphalt needed for driveways and lots.
Number of pavers needed for a patio or walkway.
Number of bricks for walls and facades.
Roofing squares and shingle bundles.
Sized for pea gravel, river rock, mulch, soil, sod and retaining walls.
Estimate pea gravel volume, weight, bags and cost for walkways, patios, playgrounds and drainage.
River rock volume, weight and cost for landscaping beds and drainage.
Cubic yards and 2 cu ft bags of mulch for garden beds.
Topsoil volume in cubic yards and tons.
Square feet, rolls and pallets of sod needed.
Blocks needed for a retaining wall.
Fresh tools we've added to the hub.
Estimate pea gravel volume, weight, bags and cost for walkways, patios, playgrounds and drainage.
Total gravel driveway cost: material, delivery and depth.
Gravel volume for a French drain trench.
Decomposed granite (DG) volume, weight and cost for paths and patios.
Debris volume and dumpster size for a renovation.
Sum materials, labor, permits and a contingency line.
From driveway gravel to a home mortgage — accurate, mobile-friendly, and always free.
Every calculator runs in your browser — no waiting, no accounts.
Standard industry formulas and material densities. No guesswork.
Designed for the job site. Works perfectly on any phone or tablet.
No signup, no ads that break your flow, no premium tier.
Common questions about how our calculators work.
107 free tools across 15 categories — from pea gravel to mortgage payments.