My Gas Calculator Web Page

Enter details found on top of gas bottle, on the embossed metalic ring:
Note : This is usually a number close to 29 pounds and 0 onces.

The weight of this Gas bottle when empty is kg.
The current weight of Gas bottle is kg.
Bottle is currently % full.

The theoretical amount of gas in full bottle is 13.00kg.
Weight of this bottle in full state is kg.
Remaining gas kg.

Patio Heater usage:

Heater conssumes 980g/hour.
Remaining hours for Patio heater: hours.
Remaining minutes for Patio heater: minutes.

BBQ usage:

Main burner is 540g/hour.
Infra-Red burner is 500g/hour.
Rottisserie burner is 300g/hour.

Most likely (Main+Infra-red together): hours.
Main burner: hours.
Infra burner: hours.
Rotiss. burner: hours.

Note : Print the below and keep with bottle for future reference.