# Free calculators for petrol pumps

> Twelve free calculators for Indian petrol pumps that run in the browser.

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

- [Density at 15 °C calculator](https://dipdensity.watsinfo.com/tools/density-at-15-calculator/): Free density at 15 °C calculator: type the hydrometer reading and temperature, get the density at 15 °C from ASTM D1250 Table 53B, for petrol and diesel.
- [Dip to litres calculator](https://dipdensity.watsinfo.com/tools/dip-to-litres-calculator/): Free dip chart calculator: choose your BPCL, IOCL or HPCL tank model, type the dip in cm, mm or bars, and get the litres, water, space left and percent full.
- [Density variation calculator](https://dipdensity.watsinfo.com/tools/density-variation-calculator/): Free calculator for the tanker density check: your hydrometer reading and temperature to density at 15 °C, compared with the invoice density against the ±3.0 kg/m³ limit.
- [Tanker unloading calculator](https://dipdensity.watsinfo.com/tools/tanker-unloading-calculator/): Free tanker decantation calculator: dip before and after unloading, plus litres sold meanwhile, gives the litres received against the invoice, shortage or excess.
- [Stock variation calculator](https://dipdensity.watsinfo.com/tools/stock-variation-calculator/): Free petrol pump stock variation calculator, laid out as MDG 2024 Annexure 9: opening dip plus receipts less sales against the closing dip, within ±4% or not.
- [Volume correction factor calculator (Table 54B)](https://dipdensity.watsinfo.com/tools/volume-correction-factor-calculator/): Free volume correction factor calculator: litres at any temperature to litres at 15 °C using ASTM D1250 Table 54B, for petrol, diesel and other refined products.
- [Tank space (ullage) calculator](https://dipdensity.watsinfo.com/tools/tank-space-calculator/): Free ullage calculator for petrol pump tanks: from the dip now and the load coming in, see the space left, whether it fits, and the dip after unloading.
- [Litres to dip calculator](https://dipdensity.watsinfo.com/tools/litres-to-dip-calculator/): Free litres to dip calculator: choose a BPCL, IOCL or HPCL tank model and type the litres to find the dip in cm, mm and bars.
- [Horizontal tank volume calculator](https://dipdensity.watsinfo.com/tools/tank-volume-calculator/): Free horizontal tank volume calculator: type the inside diameter, length and dip in cm to get the litres, full capacity and space left of any cylindrical fuel tank.
- [Evaporation loss allowance calculator](https://dipdensity.watsinfo.com/tools/evaporation-loss-calculator/): Free calculator for the evaporation and handling loss MDG 2024 allows: petrol 0.75% up to 600 KL a year and 0.60% beyond; diesel 0.25% and 0.20%.
- [5 litre measure test calculator](https://dipdensity.watsinfo.com/tools/5-litre-measure-test-calculator/): Free 5 litre measure test checker for petrol pump nozzles: type the neck scale reading in ml and see if delivery is within the ±25 ml permissible error and what MDG asks you to do.
- [Fuel litres to kg calculator](https://dipdensity.watsinfo.com/tools/fuel-weight-calculator/): Free litres to kg calculator for petrol and diesel: multiply litres at 15 °C by the density at 15 °C, or turn kilograms back into litres.