# Accuracy of COP measurements **URL:** \ **Category:** Applications\ **Tags:** cop\ **Created:** [26 January 2023 09:58 UTC](https://community.openenergymonitor.org/t/accuracy-of-cop-measurements/22637 "2023-01-26T09:58:01Z")\ **Posts on this page:** 1\ **Showing post:** 12
**Author:** ![Timbones](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/timbones/32/20308_2.png) [@Timbones](https://community.openenergymonitor.org/u/Timbones)\ **Post date:** [31 January 2023 12:05 UTC](https://community.openenergymonitor.org/t/accuracy-of-cop-measurements/22637/12 "2023-01-31T12:05:24Z")
> [@Rachel](#): > > I wonder if, for those of us who have the data, it would be useful to provide historic gas use? While not exactly the same, “equivalent gas use” can be calculated from the heat output divided by 90%. If the home is being heated to the same temperature, then this is how much gas would have been consumed, assuming that a gas boiler system is 90% efficient - this has been described as “generous”, as many systems won’t be anywhere near this good, but it’s a reasonable number for comparisons. I have an experimental dashboard that shows [running costs of heat pumps](https://heatpumpmonitor.org/costs.html) (for current UK prices). See this post for the [analysis of running costs](https://community.openenergymonitor.org/t/introducing-heatpumpmonitor-org-a-public-dashboard-of-heat-pump-performance/21885/68) I did a little while back. --- _[View the full topic](https://community.openenergymonitor.org/t/accuracy-of-cop-measurements/22637)._