Plant engineering calculator · Updated 17 September 2026
Boiler Steam-to-Fuel Ratio Calculator — kg Steam/kg Fuel & Specific Fuel
Calculate steam-to-fuel ratio, specific fuel consumption and optional benchmark gap from measured steam and fuel mass flows.
Inputs
Live results
- Steam/fuel 13.33 kg/kg
- Specific fuel 0.0750 kg/kg
- Fuel per tonne 75.0 kg/t
- Benchmark gap -0.67
Formula and method
SFR=msteam/mfuel; SFC=mfuel/msteam.
Worked example
8,000 kg/h steam from 600 kg/h fuel gives 13.33 kg steam/kg fuel.
Assumptions and limits
- Mass-flow ratio alone does not normalize fuel heating value, feedwater temperature or steam condition.
- Use boiler efficiency/fuel-comparison tools for thermodynamic normalization.
Frequently asked questions
What does this Boiler Steam-to-Fuel Ratio Calculator calculate?
Calculate steam-to-fuel ratio, specific fuel consumption and optional benchmark gap from measured steam and fuel mass flows.
Is this suitable for final design?
Use it as a transparent engineering screen. Verify final decisions against measured data, OEM curves, applicable standards and site operating limits.
Why are assumptions visible?
Plant calculations can look precise while hiding uncertain inputs. MAXScanner keeps the governing assumptions visible so scenarios can be checked and compared.