250 Gallon Propane Tank chart
Geometric capacity 250 gallons. Maximum fill 80% (~200 gal propane).
| Depth | Gallons | Liters | % Full |
|---|---|---|---|
| 1″ | 2 | 9 | 1% |
| 2″ | 7 | 26 | 3% |
| 3″ | 13 | 48 | 5% |
| 4″ | 19 | 73 | 8% |
| 5″ | 27 | 101 | 11% |
| 6″ | 35 | 132 | 14% |
| 7″ | 44 | 165 | 17% |
| 8″ | 53 | 200 | 21% |
| 9″ | 62 | 236 | 25% |
| 10″ | 72 | 274 | 29% |
| 11″ | 82 | 312 | 33% |
| 12″ | 93 | 352 | 37% |
| 13″ | 104 | 392 | 41% |
| 14″ | 114 | 433 | 46% |
| 15″ | 125 | 473 | 50% |
| 16″ | 136 | 514 | 54% |
| 17″ | 146 | 554 | 59% |
| 18″ | 157 | 594 | 63% |
| 19″ | 168 | 634 | 67% |
| 20″ | 178 | 673 | 71% |
| 21″ | 188 | 710 | 75% |
| 22″ | 197 | 747 | 79% |
| 23″ | 206 | 781 | 83% |
| 24″ | 215 | 814 | 86% |
| 25″ | 223 | 845 | 89% |
| 26″ | 231 | 874 | 92% |
| 27″ | 237 | 899 | 95% |
| 28″ | 243 | 920 | 97% |
| 29″ | 248 | 937 | 99% |
| 30″ | 250 | 946 | 100% |
Reading the gauge (don't stick a propane tank)
Propane vessels are sealed pressure vessels — you never open or stick them. Read the float gauge on top: it shows percent of water capacity, and gallons of propane = gauge % × water capacity. The inch table below is the underlying geometry, useful for cross-checking a suspect gauge against a delivery ticket. Maximum legal fill is 80%, so a healthy gauge tops out around there after a delivery.
About this chart
Source geometry: Nominal 30 in dia ASME vessel; length solved to nameplate capacity.. Values are computed with exact partial-fill formulas (see methodology) — a circular/obround segment for the shell, plus dished-head volume solved so total capacity equals nameplate water capacity.
Propane note: your float gauge reads percent of water capacity. Gallons of propane = gauge % × 250. Maximum legal fill is 80%.
FAQ
How many gallons are in my 250 gallon propane tank at half depth?
About 125 gallons. Use the stick reader above for any depth.
Where do I measure from?
From the inside bottom of the tank, straight up to the wet line on your stick. Keep the stick vertical.
Why does my manufacturer chart differ by a gallon or two?
Manufacturer charts account for that tank's exact head shape and fittings; this chart is exact for the stated geometry. Differences are typically 1–3%. Maximum fill 80% (~200 gal propane).