Industrial Gases & Cryogenic Systems worked example

Cryogenic Boil-Off Loss at 1.08% target boil-off loss rate: a worked example

This worked example runs the cryogenic boil-off loss numbers for a tougher week than the baseline: 1.08% target boil-off loss rate instead of the typical 1.5%. Calculate cryogenic boil-off loss percentage from liquid volume vented or lost, starting inventory, and target loss rate.

The inputs for this scenario

  • Cryogenic liquid lost to boil-off: 85 gal (held at the documented default)
  • Starting cryogenic liquid inventory: 5,000 gal (held at the documented default)
  • Target boil-off loss rate: 1.08 % (the input this scenario stresses; the baseline uses 1.5)

Working through the calculation

  • The calculation starts from the formula this tool documents: Cryogenic boil-off loss rate = cryogenic liquid lost to boil-off ÷ starting cryogenic liquid inventory × 100.
  • Cryogenic boil-off loss rate works out to 1.7 % at these inputs, and this is the headline figure for the scenario.
  • Cryogenic boil-off loss gap to target works out to -0.62 percentage points at these inputs.
  • Cryogenic liquid lost to boil-off works out to 85 count at these inputs.
  • Starting cryogenic liquid inventory works out to 5,000 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target boil-off loss rate sits at 1.5% and the headline result is 1.7 %, this scenario lands almost exactly on the baseline at 1.7 %.
  • Use it when reviewing tank performance over a holding period, flagging insulation or relief-valve problems, or benchmarking actual evaporation against the manufacturer's normal evaporation rate. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Cryogenic boil-off loss rate: 1.7 % (headline result)
  • Cryogenic boil-off loss gap to target: -0.62 percentage points
  • Cryogenic liquid lost to boil-off: 85 count
  • Starting cryogenic liquid inventory: 5,000 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Cryogenic Boil-Off Loss calculator, set target boil-off loss rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.