Example engineering calculations
Worked, unit-aware calculation worksheets across structural, mechanical, electrical and more. Open any example into your own workspace to edit and reuse. New to Calculeaf? Start with your first worksheet or the examples guide.
59 examples found
Exergy (Availability) of a Heat Stream
The maximum theoretical work obtainable from a heat stream at a given temperature relative to the surrounding environment.
Psychrometric Humidity Ratio
The humidity ratio (mass of water vapor per mass of dry air) of moist air from its vapor pressure and total atmospheric pressure.
Evaporative Cooler Outlet Temperature
The dry-bulb temperature of air leaving a direct evaporative cooler, from the inlet dry- and wet-bulb temperatures and cooler effectiveness.
Cooling Load from Window Solar Gain
The instantaneous cooling load a building must offset from solar radiation transmitted through a window.
Stoichiometric Air-Fuel Ratio (Octane Combustion)
The mass ratio of air to fuel needed for complete, stoichiometric combustion of octane, derived from the balanced combustion reaction.
Adiabatic Flame Temperature Rise Estimate
A simplified estimate of the temperature rise from adiabatic combustion, from the fuel's heating value, air-fuel ratio, and combustion product specific heat.
Straight Rectangular Fin Heat Transfer Rate
The heat transfer rate from a straight rectangular fin, from fin geometry, material conductivity, and the convective heat transfer coefficient.
Radiation View Factor Reciprocity Check
A check that a pair of radiation view factors between two surfaces satisfies the reciprocity relation, and back-calculation of the unknown factor.
Insulation Thickness for a Target Heat Loss
The insulation thickness needed to hold a wall's conductive heat loss at or below a target value, from rearranged Fourier's law.
Dew Point Temperature Estimate (Magnus Formula)
An estimate of the dew point temperature of moist air from its dry-bulb temperature and relative humidity using the empirical Magnus formula.
Room Air Change Rate (ACH)
The number of times per hour a room's air volume is fully replaced by ventilation airflow, a standard indoor air quality metric.