Plant engineering calculator · Updated 17 September 2026
Steam Leak Cost Calculator — Annual Steam, Energy & Cost Loss
Convert a measured or estimated steam leak rate into annual lost steam, thermal energy and cost.
Inputs
Live results
- Annual steam lost 200.0 t
- Thermal energy carried 152778 kWh
- Annual steam cost 500000
- Average thermal loss 19.10 kW
Formula and method
Annual steam = leak rate × hours; thermal energy = mass × entered enthalpy basis; annual cost = tonnes lost × steam cost.
Worked example
A 25 kg/h leak operating 8,000 h/year loses 200 tonnes of steam before any downtime correction.
When this is useful
Use it to prioritize leak repairs and translate survey findings into an annual economic value.
Assumptions and limits
- Leak rate should come from a validated estimate or measurement; this tool does not infer sonic-orifice flow.
- Steam enthalpy and unit steam cost must use the same site accounting boundary you want to value.
Frequently asked questions
Is cycling loss the same as standby loss?
No. Standby loss occurs while equipment is idle/hot; cycling loss is the incremental fuel associated with repeated shutdown, purge, warm-up and restart events.
Should I create a separate boiler cycling calculator?
No. These intents overlap heavily, so this page keeps one canonical owner and compares both loss mechanisms without creating a duplicate URL.