Free calculators for the grown-up decisions of everyday life.
Mortgages and roofing squares. Capital gains and compost cubic yards. ToolCalcPro is one place for the small math that quietly runs your home, your money, and your work.
Nine corners of everyday math.
Each category groups calculators that share a vocabulary — pick the one closest to the question you’re trying to answer.
Finance
Mortgages, refinancing, BRRRR, DSCR, debt payoff, FIRE planning, and business deals.
Construction & Home Improvement
Roofing squares, siding, concrete, asphalt, drywall, and excavation estimators.
Garden & Outdoor
Compost, raised-bed soil, pine straw, tree removal, stump grinding, and seed planting.
Home & Interior
Countertops, can lights, recessed lighting, deck stain, epoxy resin, and vinyl wrap.
Animals & Lifestyle
Aquariums, beehives, cat ages, chicken coops, dog days — for the dependents with paws and fins.
Health & Medical
Cumulative dose, dental implants, hair transplant, and other medical-cost estimators.
Math & Science
Binomial probability, boolean logic, partial derivatives, shear-force diagrams, and more.
Real Estate & Legal
State sales tax, capital gains, property tax, paychecks, auction fees, and settlement ranges.
Blog & Guides
How to actually use the calculators — step-by-step articles, worked examples, and reference.
The popular ones.
A handful of calculators that get used the most — by homeowners, contractors, and people doing their own taxes.
Texas Property Tax
Real Estate · 254 countiesCalifornia Capital Gains
Tax · Federal + StateAquarium Size Calculator
Animals · gallons + stockingCountertop Calculator
Home · sq ft + costBinomial Distribution
Math · probability + PMFDental Implant Cost
Health · per-tooth + full mouthCalculators that show their work.
Most calculators on the open web hide their math behind a single big number. Ours don’t. Every tool itemizes the inputs, shows the formula it used, and lets you tweak any line — so you understand the answer well enough to defend it in a meeting.