Oven Power & Heat Calculator Oven Power & Heat Calculator Ambient Temperature (℃) Oven Internal Temperature (℃) Workpiece Heating Weight per Hour (kg/h) Material Specific Heat (kcal/(kg·℃)) Heating Efficiency (%) Calculate Theoretical Heat Required: kcal/hour Theoretical Power Required: kW Actual Heat Required (Including Efficiency): kcal/hour Actual Power Required (Including Efficiency): kW