HPCL tank charts are plain horizontal cylinders with flat ends. Four common models are 9 KL and 16 KL (200 cm across), 22 KL (227 cm across) and 35 KL (266 cm across). Worked out from diameter and length, the litres match HP's printed charts within 2.5 litres.
The models
| Model | Inside diameter | Length | Deadwood | Full | Source |
|---|---|---|---|---|---|
| 9 KL | 200 cm | 300 cm | – | 9,425 L | HP calibration chart, 9 KL |
| 16 KL | 200 cm | 550 cm | – | 17,279 L | HP calibration chart, 16 KL |
| 22 KL | 227 cm | 600 cm | – | 24,282 L | HP calibration chart, 22 KL |
| 35 KL | 266 cm | 660.7 cm | – | 36,716 L | HP calibration chart, 35 KL; length fitted to its figures |
Sizes that are not round numbers
HPCL’s sizes, 16, 22 and 35 KL, differ from BPCL’s and IOCL’s. The full litres are slightly more than the name: a 16 KL tank holds about 17,279 litres to the top. The size in the name is a round figure; the chart goes all the way to the top of the tank.
Litres every 10 cm
Litres at each dip, rounded to the litre. For a dip between rows, use the dip to litres calculator, which works to the millimetre.
| Dip | 9 KL · 200 | 16 KL · 200 | 22 KL · 227 | 35 KL · 266 |
|---|---|---|---|---|
| 10 cm | 176 | 323 | 376 | 449 |
| 20 cm | 491 | 899 | 1,049 | 1,256 |
| 30 cm | 886 | 1,625 | 1,900 | 2,279 |
| 40 cm | 1,342 | 2,460 | 2,883 | 3,466 |
| 50 cm | 1,843 | 3,378 | 3,968 | 4,783 |
| 60 cm | 2,378 | 4,360 | 5,134 | 6,206 |
| 70 cm | 2,940 | 5,390 | 6,365 | 7,715 |
| 80 cm | 3,520 | 6,454 | 7,646 | 9,296 |
| 90 cm | 4,113 | 7,541 | 8,964 | 10,935 |
| 100 cm | 4,712 | 8,639 | 10,307 | 12,619 |
| 110 cm | 5,311 | 9,738 | 11,665 | 14,336 |
| 120 cm | 5,904 | 10,825 | 13,026 | 16,077 |
| 130 cm | 6,485 | 11,889 | 14,381 | 17,831 |
| 140 cm | 7,047 | 12,919 | 15,717 | 19,588 |
| 150 cm | 7,582 | 13,901 | 17,025 | 21,338 |
| 160 cm | 8,083 | 14,819 | 18,293 | 23,070 |
| 170 cm | 8,538 | 15,654 | 19,506 | 24,776 |
| 180 cm | 8,934 | 16,380 | 20,650 | 26,443 |
| 190 cm | 9,249 | 16,956 | 21,707 | 28,060 |
| 200 cm | 9,425 | 17,279 | 22,653 | 29,614 |
| 210 cm | 23,457 | 31,091 | ||
| 220 cm | 24,061 | 32,474 | ||
| 230 cm | 33,742 | |||
| 240 cm | 34,868 | |||
| 250 cm | 35,813 | |||
| 260 cm | 36,506 | |||
| 270 cm |
How these figures are made
Each model is a horizontal cylinder with flat ends, worked out from its inside diameter and length. The formula is exact for a perfect cylinder. These are the same figures the Dip Density app shows. This site and the app are independent and not made by Hindustan Petroleum or any oil company.
Figures here are for reference. Your oil company’s certified calibration chart, approved instruments and the Marketing Discipline Guidelines always prevail.
Questions
Can I use this chart instead of my tank's certified chart?
No. Your tank's own calibration chart, certified for that tank, always prevails. Use these figures to check a reading or when the chart is not at hand.
Why do my chart's figures differ by a litre or two?
Printed charts round each figure, and some were drawn up from measured tanks. The cylinder formula is exact for the stated diameter and length. Differences of one or two litres are rounding.
My model is not here.
Send its chart from the Dip Density app. We add the model, and it appears in the app for everyone.