AmpForge: Load Calculator

AmpForge is an all-in-one electrical calculator for electricians, contractors, engineers and homeowners. Add rooms and appliances, and AmpForge instantly works out the total load, the wire size, the breaker rating, the inverter and battery backup, and the monthly electricity bill. Everything runs on your phone. No internet, no account, no sign-up. LOAD CALCULATOR • Build a project room by room with ready-made presets (bedroom, living room, kitchen, bathroom, office, garage) • 45+ built-in appliances: lights, fans, ACs, geysers, fridges, pumps, washing machines, EV chargers and more • Add custom appliances or edit any wattage • Duplicate rooms to save time • Connected load and realistic demand load (diversity factors applied) • Current draw in amps and recommended main breaker, updated live • Supports 230V single phase, 120/240V (North America) and 400V three phase WIRE & CABLE SIZER • Recommended cable size in both mm² and AWG • Copper or aluminum conductors • Voltage drop calculation based on cable length • Power loss in watts and suggested conduit size • Clear safe / warning / danger status BREAKER SIZING • Main breaker and MCB rating from standard sizes • Recommended trip curve (B, C or D) with a simple explanation • RCD / GFCI (30 mA) guidance for wet areas • Estimated number of switches and sockets SOLAR, UPS & GENERATOR • Mark which appliances are essential for backup • Inverter size in kVA / kW • Battery bank for 12V, 24V or 48V systems • LiFePO4 lithium or tubular lead-acid batteries • Required Ah, backup hours and standby generator size ELECTRICITY BILL ESTIMATOR • Daily, monthly and yearly units (kWh) • Monthly and yearly cost with your own tariff • Currency options: $, Rs, €, £, AED, SAR • Room-by-room breakdown to see what costs the most EXTRA TOOLS • Ohm's Law calculator (volts, amps, ohms, watts) • Unit converter: HP to kW and kVA to kW • Export a project report: copy text for WhatsApp, or print / save as PDF MULTIPLE PROJECTS Save separate projects for different houses, shops or sites and switch between them anytime. BUILT FOR THE FIELD • Dark and light mode • Works fully offline, even with no signal • Fast, lightweight and ad-free PRIVACY AmpForge collects no personal data. No ads, no tracking, no analytics. Your projects stay on your device. DISCLAIMER AmpForge is an estimation and learning tool. All electrical work must follow your local electrical codes (such as NEC, IEC 60364 or BS 7671) and should be checked and installed by a qualified electrician or engineer. Feedback or feature requests: [email protected]