Math, Science & Engineering
A complete collection of scientific and engineering calculation tools for students, educators, professionals, and enthusiasts. From basic unit conversions to advanced physics simulations, financial calculations, and specialized engineering tools. Solve equations, convert measurements, calculate loan payments, simulate physical phenomena, balance chemical equations, design electrical circuits, and estimate construction costs—all with accuracy and ease.
Work out your ideal freelance hourly, daily, weekly, and monthly rates from your income goal, work schedule, business expenses, and tax rate.
Estimate total project costs by adding team members with hourly rates, fixed expenses, contingency buffer, profit margin, and tax, with ready templates.
Work out how much gravel, mulch, sand, or soil you need for landscaping. Get volume, weight, bags, and cost across multiple shapes, materials, and units.
Estimate how many bricks, plus the mortar, cement, and sand, you need for walls and pillars, with openings, bond patterns, waste factor, and cost.
Estimate fence materials — posts, rails, pickets, panels, mesh, concrete, and hardware — for wood, chain-link, vinyl, and metal fences, with cost and a diagram.
Calculate optimal stair dimensions including riser height, tread depth, angle, and stringer length, and check building-code compliance with the comfort rule instantly.
Calculate how many drywall sheets you need for walls and ceilings, with door and window deductions, a waste factor, accessories, multi-room totals, and cost.
Calculate board feet for lumber and logs. Build a material list, convert between units, and estimate costs with a waste factor.
Estimate how much flooring you need for any room shape: pieces, boxes, waste, skirting, and cost for laminate, vinyl, hardwood, and tile.
Calculate roof pitch, angle, slope percentage, and multiplier from rise and run, a pitch ratio, or an angle, then estimate rafter length and roof area.
Work out how many tiles you need for a floor or wall, with grout spacing, laying patterns, waste percentage, door and window deductions, boxes, and cost.
Calculate how much paint you need for interior or exterior rooms. Subtracts doors and windows, factors paint type, coats, texture, and waste, with multi-room totals.