- Project plans
- Project activities
- Legislation and standards
- Industry context
- Specialist wikis
Last edited 16 Jan 2021
The word ‘metre’ is the UK spelling for the base unit of length in the International System of Units (SI). In the USA, this may be spelled ‘meter’, although in the UK, ‘meter’ refers to a measuring device. For more information see: Meter.
A metre was originally defined as one ten-millionth of the distance from the equator to the North Pole along a great circle. This was later changed to the length of a reference metal bar, but in 1983 it was redefined as the distance travelled by light in a vacuum in 1/299,792,458 of a second.
A kilometre is 1000 metres.
 Related articles on Designing Buildings Wiki
Featured articles and news
Training reflects updated guidance in BSRIA BG 29/2021.
Complete list of 2021 winners now available.
Recognising past and present role models for the future.
So why not write something?
LETI publishes guidance for energy efficient home retrofits.
Predictions about adequate post-pandemic IAQ in non-domestic buildings.
Government publishes plans to 'build back greener'.
The contentious nature of claims associated with cladding, fire safety and EWS1 forms.
ECA comments on low-carbon heating systems initiative and Heat and Buildings Strategy.