Free mechanical and engineering calculators for torque, gear ratios, force, and other mechanical formulas.
Overview Formula 01What this calculator tells you A tankless (demand) water heater has no storage tank — it heats water only as it flows, so it must produce your entire peak demand in real time. Sizing it therefore comes down to two numbers: the peak flow rate in gallons per minute you need at once, … Read more
Overview Formula 01What this calculator estimates This heat pump sizing calculator estimates the capacity in kilowatts (kW) a home needs to stay warm on the coldest design day. It works from the building fabric: it multiplies the heated volume (floor area × ceiling height) by a heat-loss factor that reflects how well insulated the property … Read more
