Embed Free Interactive Pro Calculators On Your Website
Give your visitors instant engineering, clean energy, and financial calculation tools. Zero API keys, 100% free, responsive iframe code designed to maximize reader engagement and on-page dwell time.
Pin ToolsVault Directly in Your Browser Toolbar
Access all 1,000+ calculation engines with one click. Instant search across Real Estate, Solar ITC, GPU TCO, Contractor CSI-16, and Personal Finance tools directly from your browser extension tray.
Commercial Solar & BESS Peak Shaving Calculator
Calculates commercial 15-minute peak demand shaving, battery sizing (kW/kWh), and utility demand charge mitigation.
Concrete Slab & Foundation Volume Calculator
Calculates cubic yards, bag counts, rebar grid weight, and 10% spillage waste for footings and slabs.
Commercial DSCR Loan Underwriting Calculator
Calculates max loan proceeds, minimum debt service coverage ratio, debt yield, and amortizing payments.
HVAC Duct Sizing & CFM Airflow Sizer
Calculates round vs rectangular duct sizing per ACCA Manual D based on friction rate and CFM velocity.
NFPA 13 Fire Sprinkler Friction Loss Calculator
Calculates Hazen-Williams PSI pressure drop across Schedule 10 vs 40 black steel and CPVC piping.
Three-Phase Transformer kVA & Full Load Amps
480V to 208Y/120V delta-wye transformer kVA, primary/secondary full load amps, and breaker sizing.