# Evaporation loss allowance calculator

> A free calculator for the evaporation and handling loss allowance in MDG 2024 clause 5.1.11, by fuel and yearly sale, with monthly and daily averages.

Canonical: https://dipdensity.watsinfo.com/tools/evaporation-loss-calculator/
Last updated: 2026-11-02

**Short answer:** MDG 2024 allows petrol an evaporation and handling loss of 0.75% on sales up to an annual average of 600 KL, and 0.60% beyond. Diesel is allowed 0.25% and 0.20%. A pump selling 900 KL of petrol a year is allowed 6,300 litres.

The calculator runs in the browser at https://dipdensity.watsinfo.com/tools/evaporation-loss-calculator/.

## The rates

| Fuel | Up to 600 KL a year | Beyond 600 KL a year |
|---|---|---|
| Petrol (MS) | 0.75% | 0.60% |
| Diesel (HSD) | 0.25% | 0.20% |

The calculator applies the first rate to the first 600 KL of the year's sale and the second rate to the rest, then shows the month and day averages so you can compare them with your daily stock register.

## Questions

### Why is petrol allowed more than diesel?

Petrol is far more volatile. Its lighter parts evaporate every time a tank breathes, a tanker unloads or a vehicle is filled. Diesel barely evaporates at normal temperatures.

### Is this on top of the 4% band?

Clause 5.1.11 lists it as one of the factors considered along with the normal operational variation of 4% of tank stock when establishing a stock variation.

## Sources

- [BPCL, Marketing Discipline Guidelines 2024](https://www.bharatpetroleum.in/images/files/MDG-2024-Effective-24-10-2024.pdf)