Plumbing Basics

Estimate water pressure at fixture after elevation and friction losses. Free online plumbing calculator with instant, accurate results.

Size main water supply line from total fixture units. Essential plumbing tool for planning, budgeting, and project optimization.

Total water supply and drainage fixture units for pipe sizing. Free online plumbing calculator with instant, accurate results.

Calculate full-pipe head loss or solve flow from an available head budget using actual inside diameter, roughness, viscosity, fittings and elevation.

Build a measured multi-area takeoff, compare exact carton coverage with a reviewed source-tile count, and price whole packages after matching inventory.

Measure individual paint faces with their own openings and coats. Compare product-specific volume ranges, real containers, matching stock and optional cost.

Convert square meters to square feet. Area conversion for real estate and flooring. Free unit converter with precise, instant browser-based conversions — no

Audit source-labelled flow, velocity, circular area and theoretical inside-diameter arithmetic against one already documented candidate ID—without selecting nominal pipe, material or compliance.

Simple in-browser notepad with auto-save. Write quick notes that persist in your browser. Download as text file. No signup needed.

Reconcile one completed peak-hour hot-water demand with one exact storage or non-flow-activated water-heater model's source-owned First-Hour Rating.

Compare documented annual electricity use for two appliances using one local rate, entered upgrade cost, and explicit planning horizon.

Build an installed quote, compare lifetime costs and calculate material packs. Separate payment-day cash from later reimbursements using your project records.

Calculate an entered utility bill reduction and simple payback, or compare observed bill averages without assuming what caused the change.