Boiler / Steam Duty Calculator
The Boiler / Steam Duty Calculator finds the boiler heat duty (kW and boiler HP) from steam pressure, flow, and feedwater temperature. Example: for 1 kg/s of saturated steam at 10 bar from 80 °C feedwater, Boiler duty = 2441.32 kW, Boiler HP = 248.9 BHP, Saturation temp = 179.9 °C (per ASME BPVC Sec.I/IV | ASME B31.1 | ASME PTC 4 | IAPWS-IF97 | RA 8407 (PH)).
How it works
Computed from your inputs per ASME BPVC Sec.I/IV | ASME B31.1 | ASME PTC 4 | IAPWS-IF97 | RA 8407 (PH).
Worked example (Boiler & Utilities)
Inputs: 1 kg/s of saturated steam at 10 bar from 80 °C feedwater.
| Result | Value |
|---|---|
| Boiler duty | 2441.32 kW |
| Boiler HP | 248.9 BHP |
| Saturation temp | 179.9 °C |
Computed live by WorkHive's calculation engine; standard: ASME BPVC Sec.I/IV | ASME B31.1 | ASME PTC 4 | IAPWS-IF97 | RA 8407 (PH).
How to use this calculator
- Enter the figures for the duty you are sizing: the worked example below uses 1 kg/s of saturated steam at 10 bar from 80 °C feedwater.
- The calculator returns Boiler duty, Boiler HP, Saturation temp, computed per ASME BPVC Section I.
- Check the worked example to confirm the method matches how you would do it by hand, then run your own numbers in the interactive tool.
FAQ
What is a boiler steam duty calculator kW BHP?
The Boiler / Steam Duty Calculator is a free online tool that computes finds the boiler heat duty (kW and boiler HP) from steam pressure, flow, and feedwater temperature. It shows the formula and a fully worked example so you can check the method, not just the number.
How is it calculated?
The result is computed from your inputs following ASME BPVC Section I. The worked example on this page shows a real computation with real numbers.
Is the calculator free?
Yes. WorkHive's engineering calculators are free to use, no sign-up needed for the tools. WorkHive is a free, offline-first maintenance platform built for Philippine industrial plants.
Run it on your own numbers
Open the interactive Boiler / Steam Duty Calculator in WorkHive: free, no sign-up needed for the calculators.