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Plant Engineering Calculator

Updated Sep 17, 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.

Live calculationWorking shownPrivate in browser

Inputs

Results

Annual steam lost 200.0 t
Thermal energy carried 152778 kWh
Annual steam cost 500000
Average thermal loss 19.10 kW
More actions

Shared links reopen these inputs. Recent and saved calculations stay in this browser unless you clear site data.

Formula

Annual steam = leak rate × hours; thermal energy = mass × entered enthalpy basis; annual cost = tonnes lost × steam cost.

Your calculation, step by step

These steps use the values currently entered above so the result can be checked independently.

  1. 1.Formula: Annual steam = leak rate × hours; thermal energy = mass × entered enthalpy basis; annual cost = tonnes lost × steam cost.
  2. 2.Substitute: Steam leak rate (kg/h) = 25; Operating hours/year = 8000; Steam enthalpy basis (kJ/kg) = 2750; Steam cost / tonne = 2500
  3. 3.Primary result: Annual steam lost 200.0 t

How to use this calculator

  1. Enter measured or design values using the units shown beside each field.
  2. Review the live results and the substituted calculation steps before using the estimate.
  3. Check the assumptions below, then continue to a related calculator when the next engineering decision needs another model.

Worked example

A 25 kg/h leak operating 8,000 h/year loses 200 tonnes of steam before any downtime correction.

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.

How to interpret the result

Treat the primary result as an engineering screening value, then use the secondary outputs to understand scale, energy or operating impact. Confirm site measurements, equipment limits and applicable standards before making a design or control change.

Questions engineers ask

Is this a final steam audit value?

No. Validate the governing leak rate with measurement or a suitable engineering method before treating the annual loss as an audit value.

What steam cost should I enter?

Use the site steam cost at the same accounting boundary you want to evaluate, and keep the currency and tonne basis consistent with the result.

Continue the calculation

Use the next calculator in the same engineering workflow instead of restarting from search.

steam coststeam pipe sizing
Methodology. MAXScanner shows the governing formula, entered values and calculation outputs so the estimate is auditable. The calculator is a screening aid; assumptions and equipment-specific limits remain part of the engineering review.