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Professional-grade calculators for construction, finance, health & everyday math. 100% free, instant results.
Concrete Calculator
Estimate cubic yards of concrete needed
Lumber Calculator
Board feet & framing estimates
Paint Calculator
Gallons needed for your project
Tile & Flooring
Square footage with waste factor
Drywall Calculator
Sheets, mud & tape estimates
Mulch Calculator
Cubic yards for landscaping
Gravel Calculator
Tons & cubic yards needed
Roofing Calculator
Squares & shingles estimate
Fence Calculator
Posts, rails & materials
Insulation Calculator
R-value & material needs
Loan Calculator
Monthly payments & total interest
Mortgage Calculator
Home loan payment breakdown
Compound Interest
Watch your money grow over time
Salary Converter
Annual ↔ hourly ↔ monthly breakdown
Tip Calculator
Split bills & calculate tips fast
ROI Calculator
Return on investment percentage
Amortization Calculator
Loan schedule & extra payments
Inflation Calculator
Purchasing power over time
Paycheck Calculator
Net pay after taxes
Debt Payoff Calculator
Payoff timeline & interest savings
Retirement Calculator
Project your retirement savings
Auto Loan Calculator
Car payment & total cost
Gas Mileage Calculator
MPG, cost per mile & efficiency
BMI Calculator
Body mass index & healthy range
Calorie Calculator
Daily calories & TDEE
Grade Calculator
Weighted grades & what you need
Percentage Calculator
Percentages, changes & comparisons
Square Footage Calculator
Area for any shape in sq ft
Date Calculator
Days between dates & add/subtract
Discount Calculator
Sale price & savings instantly