Cryogenic Storage & LNG Equipment calculator

Tank Boil-Off Rate Calculator

Calculate cryogenic tank boil-off as a percent of starting liquid inventory so operators can judge holding performance, vent loss, and refill risk. Two counts and a target give you a rate plus how far you are from where you need to be.

What this calculator does

  • Calculate cryogenic tank boil-off as a percent of starting liquid inventory so operators can judge holding performance, vent loss, and refill risk.
  • Use it when tank boil-off rate in cryogenic storage and lng equipment needs a clean rate and gap-to-target you can put on a tier board.
  • Turns boil-off or vented liquid equivalent, starting usable liquid inventory, target maximum boil-off rate into a rate for tank boil-off rate in cryogenic storage and lng equipment.

Formula used

  • Tank boil-off rate = boil-off or vented liquid equivalent ÷ starting usable liquid inventory × 100
  • Boil-off above target = measured boil-off rate − target maximum boil-off rate

Inputs explained

  • Boil-off or vented liquid equivalent: Use measured LNG, LN2, LOX, or LAr loss converted to liquid gallons for the storage period.
  • Starting usable liquid inventory: Use usable tank volume at the start of the period, not nameplate gross capacity.
  • Target maximum boil-off rate: Use the supplier guarantee, site KPI, or operating limit for the same day, week, or test period.

How to use the result

  • Use it when tank boil-off rate in cryogenic storage and lng equipment is being reviewed against a KPI.
  • Trend matters more than a single snapshot; pull the result for the last several periods before you act.

Common questions

  • What problem does this tank boil-off rate calculator solve? Calculate cryogenic tank boil-off as a percent of starting liquid inventory so operators can judge holding performance, vent loss, and refill risk. You get a rate you can defend before quoting, scheduling, or sign-off.
  • Where do I get the inputs for this cryogenic storage and lng equipment calculator? boil-off or vented liquid equivalent, starting usable liquid inventory, target maximum boil-off rate usually move the rate most. Pull from measured cryogenic storage and lng equipment runs, supplier data, and recent quotes rather than memory.
  • What do I do with this number? Use the gap to target to prioritize the next cryogenic storage and lng equipment kaizen or corrective action.
  • What should I verify first? Confirm the counts came from the same time window and the same scope; mismatched scope is the most common error.

Last reviewed 2026-05-12.